High School Biology : Understanding Digestive Organs

Study concepts, example questions & explanations for High School Biology

varsity tutors app store varsity tutors android store

Example Questions

Example Question #1 : Understanding Digestive Organs

Which of the following does not contribute to chemical digestion in the body?

Possible Answers:

The esophagus

The mouth

The stomach

The small intestine

Correct answer:

The esophagus

Explanation:

No chemical digestion occurs in the esophagus. The esophagus is used in order to move food into the stomach using peristaltic motion.

Amylase is introduced in the mouth and begins breaking down carbohydrates. Pepsin in the stomach helps digest proteins. Lipase, trypsin, and other digestive enzymes are introduced in the small intestine, where the majority of chemical digestion takes place.

Example Question #2 : Understanding Digestive Organs

Which section of the small intestine is responsible for the majority of chemical digestion?

Possible Answers:

Jejunum

Ileum

Cecum

Duodenum

Correct answer:

Duodenum

Explanation:

The duodenum is the first section of the small intestine. It is the site of the most digestion in the small intestine (and the digestive tract in general) because pancreatic enzymes and bile are released into its lumen. These enzymes break down proteins and carbohydrates, while the bile helps to digest lipids and fats. The jejunum and ileum are primarily involved in absorbing nutrients. The cecum is part of the large intestine.

Example Question #3 : Understanding Digestive Organs

Which organ produces bile?

Possible Answers:

Pancreas

Liver

Small intestine

Gall bladder

Correct answer:

Liver

Explanation:

While the pancreas is responsible for the secretion of the majority of digestive enzymes, the liver is responsible for the creation of bile. The gall bladder is responsible for the storage of bile. When the gall bladder is stimulated, bile is released into the small intestine, where it helps with the emulsification and digestion of fats.

Example Question #74 : Tissues, Organs, And Organ Systems

Which of the following functions is not performed by the liver?

Possible Answers:

Glycogen formation

Blood filtration

Detoxification

Protein digestion

Correct answer:

Protein digestion

Explanation:

The liver has a variety of functions, including blood detoxification, glycogen formation, and blood filtration. The liver is not responsible for chemical digestion, but is needed to synthesize and store key nutrients and macromolecules. Protein digestion primarily takes place in the small intestine, though the process begins in the stomach.

Example Question #3 : Understanding Digestive Organs

Which of the following is not part of the digestive system?

Possible Answers:

Lymph nodes

Duodenum

Liver

Mouth

Colon

Correct answer:

Lymph nodes

Explanation:

The digestive system consists of the organs that food passes through, from the mouth to the anus, as well as the accessory organs that influence digestion. This includes organs that produce materials aiding in digestion, for example the liver, which produces bile the digest fats. The mouth is the first step in the digestive tract, the duodenum is a region of the small intestine, and the colon is a region of the large intestine.

The lymph nodes are part of the lymphatic system and do not play a role in the digestive system.

Example Question #4 : Understanding Digestive Organs

Which of the following is the primary function of the large intestine?

Possible Answers:

Reabsorption of water and nutrients prior to elimination of waste

Mechanical digestion of food

Maintenance of blood sugar levels

Chemical digestion of food

Correct answer:

Reabsorption of water and nutrients prior to elimination of waste

Explanation:

The large intestine is located near the end of the gastrointestinal tract. Its primary function is to reabsorb water and nutrients prior to elimination of waste. Mechanical digestion of food occurs in the mouth and stomach. Chemical digestion of food occurs in the mouth (saliva has amylase), stomach, and early in the small intestine. Blood glucose levels are maintained by the pancreas.

Example Question #5 : Understanding Digestive Organs

Bile is responsible for breaking down which macromolecule?

Possible Answers:

Proteins

Starches 

Lipids

Carbohydrates

Sugars

Correct answer:

Lipids

Explanation:

Bile is a dark greenish brown substance continuously produced by the liver. It is stored and concentrated in the gallbladder, and is released into the small intestine after eating. In the small intestine, bile aids in the digestion of lipids (this is a very important part of the absorption of fat soluble substances such as certain vitamins).  

Example Question #791 : High School Biology

Which of the following is not a component of the digestive system?

Possible Answers:

Trachea

Colon

Rectum

Mouth

Pharynx

Correct answer:

Trachea

Explanation:

The digestive system begins at the mouth where food is chewed into pieces small enough to be digested. In the mouth, food is already starting to be digested by enzymes, and is lubricated by saliva (saliva starts to be secreted even before you take your first bite). Next the pharynx, also called the throat, receives the food from the mouth. The food is then moved to the esophagus, which carries food to the stomach.  From the stomach food is moved to the small intestine, then to the colon, rectum, and anus. During this process there are a number of motility types, hormones, secretions, and accessory digestive organs involved in the digestive process. 

The trachea, also known as the windpipe, moves air from the pharynx (shared with the digestive system) to the bronchi and then into the lungs. It plays no role in digestion.  

Example Question #6 : Understanding Digestive Organs

Cystic fibrosis is an autosomal recessive disease that effects many functions and organs of the body. One of the organs effected, is the pancreas. Injury to the pancreas can lead to what?  

Possible Answers:

Pancreatic cancer 

Fat soluble vitamin deficiency 

Non fat soluble vitamin deficiency 

Decreased iron absorption 

Correct answer:

Fat soluble vitamin deficiency 

Explanation:

The pancreas is an important organ in digesting fats. The fat soluble vitamins (A, D, E, K) rely on the pancreatic function for their absorption into the body. Without the pancreas, an individual with cystic fibrosis will have fat soluble vitamin deficiencies and steatorrhea (fatty stools). 

Learning Tools by Varsity Tutors

Incompatible Browser

Please upgrade or download one of the following browsers to use Instant Tutoring: