Q: Which of the following equations correctly represents aerobic cellular respiration?

$\mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + 6\mathrm{O}_2 \rightarrow 6\mathrm{CO}_2 + 6\mathrm{H}_2\mathrm{O} + \text{ATP}$

Question 1

Which of the following best describes the process of peristalsis in the gastrointestinal (GI) tract?

Accepted Answer

It is the rhythmic contraction and relaxation of smooth muscle that propels food along the GI tract.

Question 2

A patient has a blockage in the common bile duct. Which digestive process will be most directly affected?

Accepted Answer

Emulsification of dietary fats in the small intestine

Question 3

Which of the following structures is considered retroperitoneal?

Accepted Answer

Duodenum (second and third parts)

Question 4

Which layer of the GI tract contains the majority of blood vessels, lymphatics, and nerves that supply the mucosa?

Accepted Answer

Submucosa

Question 5

A patient presents with difficulty swallowing (dysphagia). Which region of the pharynx is most likely involved if the problem occurs during the passage of food from the mouth to the esophagus?

Accepted Answer

Oropharynx

Question 6

Which of the following best explains the difference between mechanical and chemical digestion?

Accepted Answer

Mechanical digestion physically breaks food into smaller pieces; chemical digestion uses enzymes to break down macromolecules.

Question 7

Which of the following equations correctly represents aerobic cellular respiration?

Accepted Answer

$\mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 + 6\mathrm{O}_2 ightarrow 6\mathrm{CO}_2 + 6\mathrm{H}_2\mathrm{O} + 	ext{ATP}$

Question 8

Which of the following is a function of the liver in digestion?

Accepted Answer

Production of bile for fat emulsification

Question 9

A patient has a deficiency in vitamin B12 absorption. Which part of the GI tract is most likely malfunctioning?

Accepted Answer

Ileum

Question 10

Which of the following best describes the role of the enteric nervous system (ENS) in the digestive tract?

Accepted Answer

It regulates local reflexes and coordinates motility and secretion independently of the central nervous system.

Question 11

Which of the following enzymes is responsible for the breakdown of carbohydrates in the mouth?

Accepted Answer

Salivary amylase

Question 12

Which of the following best describes the function of circular folds (plicae circulares) in the small intestine?

Accepted Answer

They increase surface area for absorption.

Question 13

A patient is unable to digest fats efficiently due to a lack of bile salts. Which process is most directly impaired?

Accepted Answer

Emulsification of lipids

Question 14

Which of the following hormones stimulates the release of pancreatic enzymes and bile in response to chyme entering the duodenum?

Accepted Answer

Cholecystokinin (CCK)

Question 15

Which of the following best describes the function of Peyer's patches in the small intestine?

Accepted Answer

They are lymphatic tissue that monitor and respond to pathogens.

Question 16

Which of the following is a correct statement about the process of glycolysis?

Accepted Answer

It occurs in the cytoplasm and does not require oxygen.

Question 17

Which of the following best explains the difference between anabolic and catabolic processes?

Accepted Answer

Anabolic processes build complex molecules from simpler ones; catabolic processes break down complex molecules into simpler ones.

Question 18

Which of the following vitamins is classified as water-soluble?

Accepted Answer

Vitamin C

Question 19

A patient is experiencing rapid weight loss and muscle wasting. Which metabolic state is most likely responsible?

Accepted Answer

Fasting (postabsorptive) state

Question 20

Which of the following equations correctly represents the calculation of Body Mass Index (BMI)?

Accepted Answer

$	ext{BMI} = \dfrac{	ext{weight (kg)}}{	ext{height (m)}^2}$

Digestive System and Metabolism: Study Guide (Chapters 22 & 23)

Study Guide - Practice Questions

Study Guide - Flashcards