Question 1

Which of the following best defines absorption in the context of the digestive system?

Accepted Answer

The movement of digested nutrients from the lumen of the alimentary canal into the blood or lymph.

Question 2

Arrange the tissue layers of the alimentary canal from deepest to most superficial.

Accepted Answer

Mucosa, submucosa, muscularis externa, serosa

Question 3

Which enzyme is responsible for initiating the chemical digestion of carbohydrates in the mouth?

Accepted Answer

Amylase

Question 4

Which of the following correctly matches the stomach cell type with its secretion?

Accepted Answer

Parietal cells – intrinsic factor

Question 5

Which structure increases the surface area of the small intestine for absorption?

Accepted Answer

Villi

Question 6

Where does the majority of lipid digestion occur in the human body?

Accepted Answer

Small intestine

Question 7

Which of the following best describes the process of catabolism?

Accepted Answer

The breakdown of complex molecules into simpler ones, releasing energy.

Question 8

How many ATP molecules are produced from one glucose molecule during aerobic cellular respiration (glycolysis, citric acid cycle, and electron transport chain combined)?

Accepted Answer

$$ 38 $$

Question 9

Which of the following is the final electron acceptor in the electron transport chain (ETC)?

Accepted Answer

Oxygen

Question 10

Which ions play a critical role in generating the proton gradient across the inner mitochondrial membrane during the ETC?

Accepted Answer

Hydrogen ions ($$ \mathrm{H^+} )$$

Question 11

Which process is defined as the formation of glucose from non-carbohydrate sources such as amino acids or glycerol?

Accepted Answer

Gluconeogenesis

Question 12

A patient with chronic kidney disease has a reduced glomerular filtration rate (GFR). Which of the following best defines GFR?

Accepted Answer

The rate at which filtrate is formed by all the glomeruli of both kidneys per minute.

Question 13

Which of the following best describes the function of the Renin-Angiotensin-Aldosterone System (RAAS)?

Accepted Answer

To increase blood pressure by promoting sodium and water reabsorption.

Question 14

Which of the following is a correct sequence for the flow of filtrate through the nephron and collecting system?

Accepted Answer

Bowman's capsule → proximal convoluted tubule → loop of Henle → distal convoluted tubule → collecting duct

Question 15

Which of the following is NOT a way heat is exchanged between the body and the environment?

Accepted Answer

Filtration

Question 16

Which of the following best describes the difference between essential and non-essential nutrients?

Accepted Answer

Essential nutrients must be obtained from the diet, while non-essential nutrients can be synthesized by the body.

Question 17

Which of the following is a function of antidiuretic hormone (ADH) in the kidneys?

Accepted Answer

Increases water reabsorption, leading to concentrated urine.

Question 18

A patient is unable to voluntarily control defecation. Which anal sphincter is most likely affected?

Accepted Answer

External anal sphincter

Question 19

Which of the following best describes oxidative phosphorylation?

Accepted Answer

ATP production using energy derived from the transfer of electrons in the electron transport chain.

Question 20

Which of the following is a correct description of the micturition reflex?

Accepted Answer

An involuntary spinal reflex that causes the bladder to contract and the internal sphincter to relax.

ANP Digestive, Metabolic, and Urinary System Study Guide – Step-by-Step Guidance

Study Guide - Practice Questions

Study Guide - Flashcards