- The author's central idea that RNA is a 'versatile molecular workhorse' is supported by which detail?
Answer: tRNA reads the genetic code and delivers the correct amino acids.
When you encounter reading comprehension questions that ask how an author supports their central claim, focus on finding the specific detail that most directly demonstrates or proves that claim.
The author argues that RNA is a "versatile molecular workhorse," which means RNA performs multiple, varied, and essential functions. To support this claim, you need evidence showing RNA's diverse capabilities in action. Choice C perfectly illustrates this versatility by highlighting tRNA's dual functionality: it both reads genetic code AND delivers amino acids. This demonstrates RNA performing two distinct, complex tasks that require different molecular skills—exactly what makes it "versatile."
Choice A is incorrect because it describes DNA's role, not RNA's capabilities. While this information provides context, it doesn't demonstrate RNA's versatility. Choice B is wrong because it simply defines gene expression without showing how RNA specifically contributes to this process. Choice D is incorrect because it states the consequence of RNA's absence rather than demonstrating what makes RNA versatile. This choice tells us RNA is important but doesn't show the varied functions that make it a "workhorse."
For HESI reading questions about supporting evidence, always distinguish between background information, consequences, and direct proof. The correct supporting detail will specifically demonstrate the claim being made. Look for concrete examples of the characteristic or process described in the main idea, rather than general statements about importance or definitions of related concepts.
- Which detail best supports the author's claim that antibiotic misuse fuels the development of resistant bacteria?
Answer: Susceptible bacteria are killed by antibiotics, while mutated ones survive and reproduce.
When you encounter reading comprehension questions that ask for supporting evidence, you need to identify which detail directly demonstrates or proves the author's specific claim, not just relates to the general topic.
The author's claim is that antibiotic misuse "fuels the development" of resistant bacteria. Option B provides the clearest mechanistic explanation of how this happens: "Susceptible bacteria are killed by antibiotics, while mutated ones survive and reproduce." This directly shows the process by which antibiotic use creates selective pressure that allows resistant bacteria to proliferate. The word "fuels" in the question maps perfectly to this survival-and-reproduction cycle.
Option A discusses the lack of new antibiotic development, which relates to why resistance is problematic but doesn't explain how misuse creates resistance in the first place. Option C gives an example of a resistant bacterium (MRSA) but doesn't demonstrate the mechanism by which antibiotic use drives resistance development. Option D simply restates that resistance is a crisis without providing supporting evidence for how misuse contributes to the problem.
The key trap here is confusing examples or consequences with actual evidence. MRSA (option C) might seem compelling because it's a concrete example, but it doesn't show the cause-and-effect relationship the question asks about.
For HESI reading questions asking for supporting evidence, always look for the option that explains "how" or "why" the claim works, not just examples of the claim's effects. The best supporting detail will mirror the logical structure of the main argument.
- The author supports the main idea of homeostasis as a dynamic self-regulating process by providing which example?
Answer: The body initiates sweating and vasodilation in response to rising temperatures.
When you encounter reading comprehension questions asking how an author "supports" a main idea, you're looking for specific examples or evidence the author uses to illustrate their central point.
The passage establishes that homeostasis is a "dynamic self-regulating process" where the body maintains stability through constant adjustments. To support this abstract concept, the author provides a concrete example of thermoregulation. Choice B captures this perfectly—when body temperature rises, the body responds with sweating and vasodilation to cool down. This demonstrates the dynamic, active nature of homeostasis in action.
Choice A describes the importance of homeostasis (why it matters for enzymes and cells) but doesn't provide an example of how the self-regulating process actually works. Choice C simply restates the definition of homeostasis rather than supporting it with evidence. Choice D mentions that feedback loops achieve self-regulation, but this is more of an explanation of the mechanism rather than a specific example showing homeostasis in action.
The key distinction is between describing homeostasis (what it is or how it works) versus demonstrating it through a specific physiological example. The thermoregulation example with sweating and vasodilation shows the body actively detecting change and responding to maintain balance.
For HESI reading questions, remember that "supporting evidence" means concrete examples, not definitions or explanations of importance. Look for the most specific, tangible illustration of the concept being discussed.
- Which detail from the passage supports the main idea that the gut microbiome is crucial for proper immune function?
Answer: Certain bacteria help T-cells distinguish between pathogens and harmless microbes.
When you encounter reading comprehension questions asking which detail "supports the main idea," you need to identify which piece of evidence directly demonstrates or proves the central claim being made.
The passage's main idea is that the gut microbiome is crucial for proper immune function. Answer choice C provides the strongest support because it describes a specific, direct mechanism: certain bacteria actively help T-cells distinguish between pathogens and harmless microbes. This is a concrete example of how the microbiome is essential for immune system training and proper function. Without this bacterial guidance, the immune system couldn't properly identify threats, making it truly crucial rather than just helpful.
Answer A simply states a fact about the gut's bacterial population but doesn't explain why this matters for immune function. It's descriptive background information, not evidence of the microbiome's importance. Answer B mentions that SCFAs have anti-inflammatory properties, which relates to immune function, but doesn't establish that the microbiome is "crucial" – anti-inflammatory effects could be beneficial without being essential. Answer D focuses on timing (early life being most significant) rather than demonstrating why the microbiome is crucial in the first place.
On HESI reading questions, distinguish between supporting details that merely relate to the topic versus those that actually prove or demonstrate the main claim. Look for evidence that shows causation, necessity, or direct functional relationships rather than just descriptive facts or peripheral connections.
- The author's argument that public sanitation was a major public health breakthrough is supported by which piece of evidence?
Answer: Mortality rates from infections dropped sharply after sewer systems were built.
When you encounter reading comprehension questions asking for evidence that supports an author's main argument, you need to distinguish between general background information and specific proof that directly validates the central claim.
The author's main argument is that public sanitation systems represented "one of the most significant advances in public health history." To support this bold claim, you need evidence showing measurable, dramatic improvement. Option C provides exactly this: "Mortality rates from infections dropped sharply after sewer systems were built." This demonstrates cause and effect with quantifiable results—the infrastructure was implemented, and death rates immediately plummeted. This concrete outcome directly proves the "significant advance" claim.
Let's examine why the other options fall short. Option A describes the problem that existed before sanitation systems but doesn't prove the systems were effective solutions. Option B explains the mechanism of disease transmission, which is background information rather than evidence of improvement. Option D restates the author's concluding principle about prevention versus treatment, but this is a general statement, not specific evidence about sanitation's impact.
The key distinction is between describing problems or principles versus demonstrating measurable results. Background context and general principles don't constitute proof of effectiveness.
For HESI reading questions, remember that "evidence" means concrete data or outcomes that directly support the main claim. Look for measurable changes, statistical improvements, or specific results rather than descriptive information or restated conclusions. The strongest evidence will show clear cause-and-effect relationships with quantifiable impacts.
- According to the passage, which factor most strongly supports the argument that HAI prevention requires systematic, multi-faceted approaches?
Answer: Bundle approaches combining multiple practices have reduced CLABSI rates by over 70%
Choice B most strongly supports the need for systematic, multi-faceted approaches by demonstrating their effectiveness with specific outcome data. Choice A shows a single factor's inadequacy but doesn't directly support multi-faceted solutions. Choice C describes severity but not prevention strategy needs. Choice D illustrates one environmental challenge but doesn't support systematic approaches.
- Which detail supports the author's argument that the integumentary system plays an active, multifaceted role in health?
Answer: The skin synthesizes vitamin D when it is exposed to ultraviolet light.
When you encounter reading comprehension questions that ask which detail "supports" an author's argument, you need to identify evidence that directly demonstrates the claim being made. The author argues that the integumentary system plays an "active, multifaceted role" in health, meaning it performs multiple important functions rather than serving as just a protective barrier.
The correct answer is C because vitamin D synthesis perfectly exemplifies both "active" and "multifaceted" functioning. This process shows the skin actively producing an essential nutrient (not just passively protecting), and it represents an additional role beyond the defense and temperature regulation functions already mentioned. This biochemical activity demonstrates the skin's complex, multi-dimensional contributions to health.
Let's examine why the other options don't support this argument: Option A simply lists the components of the integumentary system without showing any active functions. Option B describes a protective role, which could be considered passive defense rather than demonstrating active, varied functionality. Option D identifies a type of specialized cell but doesn't explain what these cells actually do or how they contribute to the system's active role.
For HESI reading questions, remember that "supporting evidence" must directly prove the specific claim being made. Look for details that demonstrate action, process, or function rather than just description or identification. The strongest supporting evidence will show concrete examples of the behavior or characteristic the author is highlighting.
- Which detail from the passage supports the idea that the skeletal system has a key metabolic function?
Answer: The skeleton serves as a reservoir, releasing calcium to regulate blood levels.
When you encounter questions about body systems on the HESI, you need to distinguish between structural functions (what something is) and metabolic functions (what biochemical processes it performs). Metabolic functions involve chemical reactions, substance conversion, or regulation of body chemistry.
The correct answer is C because it describes a specific metabolic process: the skeleton actively releasing stored calcium into the bloodstream to maintain proper blood chemistry levels. This is a regulatory metabolic function where bones chemically interact with the circulatory system to maintain homeostasis. The passage emphasizes this happens continuously and is "regulated by hormones," indicating active metabolic control.
Answer A describes structural support and protection—these are mechanical, not metabolic functions. While important, they don't involve chemical processes or substance regulation. Answer B discusses hematopoiesis (blood cell production), which is indeed a metabolic function, but this occurs in bone marrow rather than in the bone tissue itself. The question asks about skeletal system metabolic function specifically. Answer D simply states that bone is "living tissue," which is too general and doesn't identify any specific metabolic process.
On the HESI, watch for questions that test whether you can identify the difference between structural roles (support, protection, shape) and metabolic roles (chemical production, regulation, conversion). Look for keywords like "releases," "produces," "regulates," or "maintains levels" to spot metabolic functions.
- Which supporting detail best demonstrates why medication adherence problems persist despite healthcare provider awareness?
Answer: Healthcare providers often underestimate non-adherence rates in their patients
Choice B best demonstrates persistence of adherence problems by showing that providers lack accurate awareness of the problem's scope, creating a barrier to effective intervention. Choice A describes one cause but doesn't explain persistence despite awareness. Choice C describes technology limitations but not provider awareness issues. Choice D describes cultural factors but doesn't address the awareness component.
- Which detail from the passage provides the strongest evidence that microbiome disruption has wide-ranging health consequences?
Answer: Dysbiosis contributes to inflammatory bowel disease, allergies, and mental health disorders
Choice C provides the strongest evidence by listing diverse health consequences (digestive, immune, and neurological disorders) directly linked to microbiome disruption. Choice A describes normal function but not disruption consequences. Choice B explains immune training but not disruption effects. Choice D shows correlation with autism but represents a single condition rather than wide-ranging effects.
- Which detail from the passage most directly supports the main idea that human practices have accelerated the development of antibiotic resistance?
Answer: Surviving bacteria with resistance genes multiply rapidly when antibiotics are discontinued prematurely
Choice C most directly supports the main idea by providing a specific mechanism showing how human behavior (premature discontinuation of antibiotics) directly accelerates resistance development. Choice A describes the evolution of MRSA but doesn't specify human causation. Choice B describes agricultural practices but is less direct about acceleration. Choice D restates the problem's significance rather than supporting the causation claim.
- The author supports the claim that the lymphatic system is essential by highlighting which of its functions?
Answer: It prevents the buildup of excess fluid in body tissues, known as edema.
When analyzing reading comprehension questions about supporting evidence, focus on what the author explicitly uses to demonstrate their main claim. Here, the author states the lymphatic system is "essential" and must provide evidence to back up this assertion.
The author directly supports the essentiality claim by explaining how the lymphatic system prevents edema: "One of its primary roles is to collect excess interstitial fluid from tissues and return it to the bloodstream, preventing fluid buildup, or edema." This function demonstrates why the system is essential - without it, dangerous fluid accumulation would occur in body tissues. Answer D correctly identifies this supporting evidence.
Looking at the incorrect options: Answer A describes how the lymphatic system works (lacking a pump, using muscle contractions) but doesn't explain why this makes it essential - this is structural description, not functional importance. Answer B mentions fat transport, which the passage does include, but this is presented as additional information rather than primary evidence for essentiality. Answer C states that the system works with circulatory and immune systems, but while the passage mentions this relationship, the author doesn't use this connection as the main supporting evidence for why the system is essential.
The key difference is between what the passage mentions versus what it uses as supporting evidence. The author specifically positions edema prevention as a "primary role" and directly connects it to the system's importance.
For reading comprehension questions asking about supporting evidence, always distinguish between background information and the specific details an author uses to prove their main point. Look for direct cause-and-effect relationships that demonstrate importance or necessity.
- Which supporting detail best illustrates why quality improvement success depends on organizational culture rather than just methodology?
Answer: Frontline staff may resist changes imposed without their input despite their workflow knowledge
When you encounter questions about healthcare quality improvement, focus on distinguishing between technical methods and the human elements that make them succeed or fail. This question asks you to identify evidence that culture, not just methodology, drives lasting improvement.
Choice D correctly illustrates the cultural challenge because it highlights the paradox of human resistance to change. Even when frontline staff have valuable workflow knowledge that could improve processes, they resist changes imposed without their input. This demonstrates that successful quality improvement isn't just about having the right methods—it's about creating a culture where people feel heard, valued, and engaged in the change process. The resistance occurs despite staff having relevant expertise, showing that the problem isn't knowledge or capability, but rather organizational culture and communication patterns.
Choice A describes a methodology (PDSA cycles) but doesn't address cultural factors that influence success. Choice B mentions deterioration without reinforcement, but this could be solved through better project management rather than cultural change—it doesn't specifically illustrate why culture matters more than methodology. Choice C identifies a technical resource limitation (analytics capabilities) rather than a cultural barrier, focusing on what organizations lack technologically rather than behaviorally.
For HESI questions about organizational change, remember that technical solutions often fail due to human factors. Look for answer choices that highlight resistance, engagement, communication, or leadership dynamics rather than just describing processes or resource constraints. Cultural transformation involves changing how people think and interact, not just what tools they use.
- The author's main point that carbohydrates are an essential energy source is supported by which of the following details?
Answer: The brain is an organ that depends almost exclusively on glucose for its fuel.
When you encounter reading comprehension questions that ask about supporting details for a main point, focus on identifying which piece of evidence most directly reinforces the author's central argument.
The author's main claim is that carbohydrates are essential for energy. The strongest supporting detail is found in choice C: the brain depends almost exclusively on glucose for fuel. This directly demonstrates why carbohydrates are essential—they provide glucose that a vital organ requires to function. Without adequate carbohydrates, the brain cannot operate properly, making them truly indispensable rather than just beneficial.
Choice A discusses what happens to excess glucose after glycogen stores are full, but this addresses storage and conversion processes rather than why carbohydrates are essential. Choice B mentions popular diets' negative perception of carbohydrates, which provides context but doesn't support the claim that carbohydrates are necessary—it's background information about public opinion. Choice D identifies sources of complex carbohydrates, which is descriptive information but doesn't explain why the body needs them.
The key distinction is between information that's related to the topic versus information that actually proves the main point. Details about brain glucose dependency provide compelling evidence for essentiality, while storage processes, public perceptions, and food sources are supporting context.
For HESI reading questions, always ask yourself: "Does this detail directly prove the author's main argument, or does it just relate to the topic?" Look for the evidence that would be hardest to argue against when defending the main point.
- The passage suggests that effective pain management is multifaceted. Which supporting detail best illustrates the complexity of this approach?
Answer: Cultural background influences both how patients express pain and their treatment preferences
Choice C best illustrates complexity by showing how cultural factors add layers of consideration beyond medical assessment, requiring providers to navigate both clinical and cultural dimensions. Choice A explains one theory but doesn't show complexity. Choice B describes a tool but not complexity. Choice D describes physical therapy benefits but represents a single intervention approach.
- Which detail most effectively supports the passage's assertion that the nursing shortage creates a self-perpetuating crisis?
Answer: Overwhelming workloads drive experienced nurses to leave bedside care or exit the profession
Choice B most effectively demonstrates self-perpetuation by showing how current shortages create conditions (overwhelming workloads) that drive away existing staff, worsening the shortage. Choice A describes consequences but not the self-perpetuating mechanism. Choice C shows high turnover but doesn't connect to the perpetuating cycle. Choice D describes educational constraints but not the self-reinforcing nature.
- The author's claim that chronic inflammation can be harmful is supported by which statement?
Answer: It contributes to the buildup of atherosclerotic plaques in heart disease.
When analyzing reading comprehension questions that ask for supporting evidence, you need to identify which statement directly backs up the author's specific claim with concrete examples or mechanisms.
The author claims that chronic inflammation "can be profoundly damaging" and then provides specific examples of how this damage occurs. Answer choice D gives a concrete mechanism: chronic inflammation "contributes to the buildup of atherosclerotic plaques in heart disease." This directly supports the harm claim by explaining exactly how chronic inflammation causes damage in cardiovascular disease.
Let's examine why the other choices don't provide this support. Choice A discusses acute inflammation being beneficial, which actually contrasts with rather than supports the claim about chronic inflammation's harm. Choice B simply lists the physical signs of inflammation without addressing whether chronic inflammation is harmful or beneficial. Choice C states that chronic inflammation is "an underlying factor in many age-related conditions," but being an "underlying factor" doesn't necessarily prove harm—it could theoretically be neutral or even beneficial.
The key distinction is that D provides a specific pathological mechanism (plaque buildup), while C only establishes association without proving causation or harm. The passage uses D as evidence to support its claim, making it the strongest supporting statement.
For HESI reading questions asking about supporting evidence, look for answer choices that provide specific examples, mechanisms, or concrete details that directly demonstrate the author's point, rather than general statements or background information.
- Which statement from the passage supports the main idea that myelin enhances the speed of nerve impulses?
Answer: The action potential jumps from one node of Ranvier to the next.
Reading comprehension questions on the HESI often ask you to identify which specific detail from a passage best supports the main idea. You need to distinguish between general background information and the key evidence that directly proves the central claim.
The passage's main idea is that myelin enhances nerve impulse speed. To support this claim, you need evidence that shows the mechanism by which myelin actually makes signals faster. Choice C states "The action potential jumps from one node of Ranvier to the next" — this describes saltatory conduction, which the passage explicitly identifies as "significantly faster" than the alternative. This jumping mechanism is the direct way myelin creates speed enhancement.
Choice A describes what myelin is (a lipid-rich insulating substance) but doesn't explain how it increases speed — it's background information, not supporting evidence. Choice B explains what happens in unmyelinated axons (continuous propagation) but describes the slower process, not how myelin improves speed. Choice D mentions that high-speed communication is needed for motor control, but this explains why speed matters rather than how myelin creates that speed.
When answering "supports the main idea" questions, look for the specific mechanism, process, or evidence that directly demonstrates the claim rather than general descriptions or consequences. The correct supporting detail should show how or why the main idea works, not just provide context around it.
- The passage argues that population health management requires a paradigm shift. Which detail most strongly supports this argument by contrasting new approaches with traditional healthcare?
Answer: Social determinants often have greater impact on health outcomes than medical interventions alone
When you encounter questions about paradigm shifts in healthcare, focus on identifying what fundamentally changes between old and new approaches. A paradigm shift represents a complete transformation in thinking, not just an improvement in methods or tools.
The passage argues that population health management shifts focus from individual patient care to community-wide health improvement. Answer choice A most strongly supports this argument because it directly contrasts the traditional medical model (medical interventions) with the new population health approach (addressing social determinants). This statement fundamentally challenges the assumption that healthcare solutions are primarily medical, suggesting instead that non-medical factors like housing, food security, and education may be more powerful drivers of health outcomes. This represents a true paradigm shift in how we conceptualize health improvement.
Answer choice B describes community health workers' services, which is an implementation strategy rather than evidence of paradigm shift. Answer choice C mentions GIS mapping technology, which is simply a new tool for analysis, not a fundamental change in thinking. Answer choice D discusses long-term investment requirements, which describes a challenge of the new approach but doesn't contrast it with traditional methods to demonstrate the shift.
Remember that paradigm shift questions test whether you can identify what fundamentally changes versus what's merely different. Look for answer choices that explicitly contrast old versus new thinking or challenge core assumptions of the traditional approach. The strongest evidence of paradigm shift will show how basic beliefs or priorities have transformed, not just how methods have improved.
- The author's claim that sleep deprivation negatively impacts cognitive abilities is supported by which statement?
Answer: fMRI scans reveal decreased activity in key brain regions during tasks.
When you encounter reading comprehension questions that ask about supporting evidence for an author's claim, focus on distinguishing between background information and actual proof. The passage argues that sleep deprivation harms cognitive abilities, so you need to identify which statement provides concrete evidence for this claim.
Option D is correct because fMRI scans showing "reduced activity in this region [prefrontal cortex] in sleep-deprived individuals" provides direct, measurable scientific evidence that sleep deprivation physically impacts brain function during cognitive tasks. This neuroimaging data directly supports the author's claim about cognitive impairment.
Option A is wrong because feeling fatigued is a subjective symptom, not evidence of cognitive decline. Fatigue doesn't prove that thinking abilities are actually impaired. Option B describes what the prefrontal cortex normally does but doesn't show that sleep deprivation affects it—this is just background anatomy. Option C defines memory consolidation but doesn't demonstrate that sleep deprivation disrupts this process; it's merely explaining a concept.
The key distinction is between describing normal processes versus showing how sleep deprivation disrupts them. Options A, B, and C provide context or definitions, while only option D presents empirical evidence of dysfunction.
For HESI reading questions about supporting evidence, always look for statements that provide measurable proof, research findings, or observable changes rather than general descriptions or background information. Evidence should demonstrate the relationship the author claims exists.
