Question 1

Which layer of the digestive tract is responsible for peristalsis, the wave-like contractions that move food along the GI tract?

Accepted Answer

Muscularis externa

Question 2

A patient presents with inflammation of the peritoneum. Which anatomical structure is most directly affected?

Accepted Answer

The double-layered membrane lining the abdominal cavity

Question 3

Which of the following best describes the function of parietal cells in the stomach?

Accepted Answer

Secretion of hydrochloric acid ($$\mathrm{HCl})$$

Question 4

During digestion, which process is primarily responsible for the breakdown of food into absorbable molecules?

Accepted Answer

Chemical digestion

Question 5

Which of the following statements about the mesentery is correct?

Accepted Answer

It is a double layer of peritoneum that supports and anchors abdominal organs.

Question 6

A patient has a deficiency in vitamin B12 absorption. Which cell type in the stomach is most likely dysfunctional?

Accepted Answer

Parietal cells

Question 7

Which equation best represents the chemical reaction for the formation of hydrochloric acid ($$\mathrm{HCl}) in $$the stomach?

Accepted Answer

$$\mathrm{H^+ + Cl^- \rightarrow HCl}$$

Question 8

Which nervous system division is primarily responsible for stimulating peristalsis in the GI tract?

Accepted Answer

Enteric nervous system

Question 9

If the lower esophageal sphincter fails to close properly, which condition is most likely to result?

Accepted Answer

Gastroesophageal reflux disease (GERD)

Question 10

Which of the following best describes segmentation in the small intestine?

Accepted Answer

Localized contractions that mix and churn food without moving it forward

Question 11

A patient with a ruptured appendix is at risk for which life-threatening condition due to the spread of infection in the peritoneal cavity?

Accepted Answer

Sepsis

Question 12

Which of the following is NOT a function of the liver in the digestive system?

Accepted Answer

Absorption of nutrients

Question 13

Which type of epithelial tissue lines the stomach and is specialized for secretion and protection?

Accepted Answer

Simple columnar epithelium

Question 14

Which of the following best explains why the stomach is highly acidic?

Accepted Answer

To activate pepsinogen into pepsin for protein digestion

Question 15

Which of the following is a correct sequence of events during swallowing?

Accepted Answer

Bolus passes through the pharynx, then the esophagus, then enters the stomach

Question 16

Which of the following best describes the role of chief cells in the stomach?

Accepted Answer

Secretion of pepsinogen

Question 17

A patient is unable to digest proteins efficiently due to a lack of pepsin. Which process is most directly affected?

Accepted Answer

Chemical digestion

Question 18

Which of the following best describes the function of the enteric nervous system?

Accepted Answer

Controls digestive tract motility and secretion independently of the CNS

Question 19

Which of the following is a real-life consequence of a blocked bile duct?

Accepted Answer

Impaired fat digestion and absorption

Question 20

Which formula best represents the calculation of gastric acid concentration if the stomach contains $$0.1$$ moles of $$\mathrm{HCl} in$$ $$1$$ liter of solution?

Accepted Answer

$$\mathrm{[HCl] = \frac{0.1\ mol}{1\ L} = 0.1\ M}$$

Digestive System: Anatomy & Physiology Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard