Question 1

Which of the following best describes the dual function of the pancreas in the digestive system?

Accepted Answer

It produces digestive enzymes (exocrine) and hormones like insulin and glucagon (endocrine).

Question 2

A patient has a blockage preventing the release of pancreatic juice into the duodenum. Which of the following digestive processes would be most directly impaired?

Accepted Answer

Breakdown of carbohydrates, proteins, and fats in the small intestine

Question 3

Which of the following correctly matches a pancreatic enzyme with its substrate?

Accepted Answer

Lipase – lipids

Question 4

What is the primary role of bicarbonate ions ($\mathrm{HCO_3^-}$) in pancreatic juice?

Accepted Answer

To neutralize acidic chyme entering the duodenum

Question 5

Which hormone stimulates the pancreas to secrete enzyme-rich pancreatic juice in response to fatty chyme in the duodenum?

Accepted Answer

Cholecystokinin (CCK)

Question 6

During digestion, which of the following is the correct sequence for the activation of pancreatic proteases?

Accepted Answer

Trypsinogen is activated to trypsin, which then activates procarboxypeptidase to carboxypeptidase.

Question 7

A patient with a deficiency in bile production would have the most difficulty digesting which type of nutrient?

Accepted Answer

Fats

Question 8

Which of the following best explains why pancreatic enzymes are secreted in an inactive form?

Accepted Answer

To avoid autodigestion of pancreatic tissue

Question 9

Which process is responsible for moving meal remnants, bacteria, and debris into the large intestine after nutrient absorption in the small intestine?

Accepted Answer

Peristalsis

Question 10

A patient presents with symptoms of adult celiac disease. Which of the following best describes the underlying mechanism?

Accepted Answer

Gluten-induced damage to intestinal villi, reducing microvilli length

Question 11

Which of the following is a unique feature of the large intestine that aids in its function?

Accepted Answer

Teniae coli, which are bands of longitudinal smooth muscle

Question 12

Which of the following best describes the absorption of fatty acids in the small intestine?

Accepted Answer

Fatty acids and monoglycerides diffuse into intestinal cells, are packaged into chylomicrons, and enter lacteals.

Question 13

Which of the following statements about water absorption in the digestive tract is correct?

Accepted Answer

Water is absorbed by osmosis, following the active transport of solutes.

Question 14

A patient has a mutation that prevents the production of intrinsic pacemaker cells (Cajal cells) in the small intestine. Which process would be most directly affected?

Accepted Answer

Segmentation

Question 15

Which of the following is a function of the bacterial flora in the large intestine?

Accepted Answer

Synthesis of B complex vitamins and vitamin K

Question 16

Which of the following best explains why colon cancer often leads to secondary liver cancer?

Accepted Answer

Cancer cells from the colon metastasize via the hepatic portal vein to the liver.

Question 17

Which of the following best describes the absorption of glucose in the small intestine?

Accepted Answer

Glucose is absorbed via cotransport with $\mathrm{Na^+}$ ions and transported to the liver via the hepatic portal vein.

Question 18

Which of the following is true regarding the regulation of calcium absorption in the small intestine?

Accepted Answer

Calcium absorption is regulated by vitamin D and parathyroid hormone (PTH).

Question 19

A patient has a lesion affecting the enteric nervous system's cholinergic neurons in the GI tract. Which of the following would most likely be impaired?

Accepted Answer

Contraction and shortening of the circular and longitudinal muscle layers

Question 20

Which of the following best describes the process of defecation?

Accepted Answer

It is triggered by distension of rectal walls, leading to contraction of the rectal walls and relaxation of the internal anal sphincter.

Digestive System: Pancreas Structure, Function, and Pancreatic Juice

Study Guide - Practice Questions

Study Guide - Flashcards