Human Anatomy and Physiology : Help with Other Innate Immunity Physiology

Study concepts, example questions & explanations for Human Anatomy and Physiology

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Example Questions

Example Question #1 : Help With Other Innate Immunity Physiology

Leukocytopenia is defined as which of the following?

Possible Answers:

Abnormally high white blood cell counts

Abnormally low white blood cell counts

Abnormally low red blood cell counts

Abnormally low platelet counts

Correct answer:

Abnormally low white blood cell counts

Explanation:

The suffix "-penia" in medical terminology is used to signify a deficiency. This means that the amount is abnormally low. The prefix "leuko-" can also be found in the word leukocytes, which is another word for white blood cells. As a result, leukocytopenia means abnormally low white blood cell levels.

Erythropenia is a condition in which erythrocyte counts (red blood cells) are low.

Example Question #2 : Help With Other Innate Immunity Physiology

Which of the following is not an example of innate immunity in the body?

Possible Answers:

Stomach acid

Skin

Neutrophils

Plasma cells

Correct answer:

Plasma cells

Explanation:

Innate immunity is a generalized defense system against invading pathogens and foreign materials. In other words, these defenses are already found in the body and do not need to see a pathogen before becoming present. Plasma cells arise from B-lymphocytes, and must interact with an antigen from a pathogen in order to proliferate in the body.

Skin, stomach acid, and granulocytes (such as neutrophils) are constant presences in the body that help defend against pathogens.

Example Question #3 : Help With Other Innate Immunity Physiology

Which of the following does not limit bacterial growth?

Possible Answers:

Bacterial cell density

Increased nutrient availability

Immune response

Decreased nutrient availability

Correct answer:

Increased nutrient availability

Explanation:

Increased nutrient availability would increase bacterial cell growth, while all the other answers decrease ability of bacteria to grow in culture.

Example Question #4 : Help With Other Innate Immunity Physiology

Which of the following is not a part of innate immunity?

Possible Answers:

Tears

Saliva

Skin

Stomach acid

Antibodies 

Correct answer:

Antibodies 

Explanation:

The immune system consists of two components, the innate (non-specific) and the adaptive (specific) arms. These components work together to prevent infection, clear established infections, and to protect against disease or foreign bodies. The innate (non-specific) system consists of barriers, the complement cascade, and other specialized cells. Barriers include saliva, tears, skin, mucous linings, stomach acid, and "good" gut bacteria (this outcompetes bad bacteria). 

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