Question 1

Which of the following best describes the function of surfactant in the alveoli of the lungs?

Accepted Answer

It decreases the surface tension of alveolar fluid, preventing alveolar collapse during exhalation.

Question 2

Which hormone is produced by the beta cells of the pancreas, and what is its primary effect on the body?

Accepted Answer

Insulin; decreases blood glucose by promoting cellular uptake of glucose.

Question 3

A patient has a tumor blocking the right primary bronchus. Which of the following is most likely to occur?

Accepted Answer

Reduced airflow to the right lung, which is more likely because the right primary bronchus is wider and more vertical.

Question 4

Which of the following correctly matches the digestive enzyme with its substrate and site of action?

Accepted Answer

Lipase; lipids; small intestine

Question 5

Which of the following is the correct order of blood flow through the kidney, starting from the renal artery?

Accepted Answer

Renal artery → interlobar artery → arcuate artery → interlobular artery → afferent arteriole → glomerulus → efferent arteriole → peritubular capillaries → interlobular vein → arcuate vein → interlobar vein → renal vein

Question 6

Which of the following best describes the difference between the conducting and respiratory portions of the respiratory tract?

Accepted Answer

The conducting portion moves air to the sites of gas exchange; the respiratory portion is where gas exchange occurs.

Question 7

Which of the following cells in the stomach secrete hydrochloric acid ($$\mathrm{HCl}$$)?

Accepted Answer

Parietal cells

Question 8

A patient is unable to produce bile. Which of the following processes would be most directly affected?

Accepted Answer

Emulsification and absorption of dietary fats in the small intestine

Question 9

Which of the following best describes the difference between the right and left lungs?

Accepted Answer

The right lung has three lobes and the left lung has two lobes.

Question 10

Which of the following is a function of the proximal convoluted tubule (PCT) in the nephron?

Accepted Answer

Reabsorption of water, ions, and all organic nutrients

Question 11

Which of the following best describes the chemical structure of steroid hormones?

Accepted Answer

They are derived from cholesterol and are lipid-soluble.

Question 12

Which of the following is NOT a function of the urinary system?

Accepted Answer

Synthesis of digestive enzymes

Question 13

Which of the following is the correct sequence of the layers of the digestive tract from innermost to outermost?

Accepted Answer

Mucosa → submucosa → muscularis externa → serosa

Question 14

A patient has a mutation that prevents the production of amylase. Which of the following would most likely be impaired?

Accepted Answer

Digestion of carbohydrates in the mouth and small intestine

Question 15

Which of the following best describes the epithelium lining the alveoli of the lungs?

Accepted Answer

Simple squamous epithelium

Question 16

Which of the following is a correct statement about the permanent and deciduous (baby) teeth sets in humans?

Accepted Answer

There are 32 permanent teeth and 20 deciduous teeth.

Question 17

Which of the following best describes the function of the loop of Henle in the nephron?

Accepted Answer

It establishes an osmotic gradient in the medulla to concentrate urine.

Question 18

Which of the following is a primary digestive organ, not an accessory organ?

Accepted Answer

Stomach

Question 19

Which of the following hormones is released in response to neural stimuli?

Accepted Answer

Epinephrine from the adrenal medulla

Question 20

A patient is diagnosed with a blockage in the distal convoluted tubule (DCT) of the nephron. Which of the following processes would be most directly affected?

Accepted Answer

Fine-tuning of sodium and water reabsorption under hormonal control

Comprehensive Study Notes: Endocrine, Respiratory, Digestive, and Urinary Systems

Study Guide - Practice Questions

Study Guide - Flashcards