Question 1

Which of the following best describes the primary function of the respiratory system?

Accepted Answer

To supply oxygen to tissues and remove carbon dioxide from the body

Question 2

Which structure prevents food from entering the trachea during swallowing?

Accepted Answer

Epiglottis

Question 3

A patient with cystic fibrosis has thickened mucus in the bronchi. What is the most direct consequence of this for respiratory function?

Accepted Answer

Reduced gas exchange due to blocked airways

Question 4

Which equation correctly represents the formation of bicarbonate in the blood?

Accepted Answer

$$\mathrm{CO_2$ + H_2O \rightarrow H_2CO_3 \rightarrow $$HCO_3$$^- + H^+}$$

Question 5

During external respiration, where does gas exchange primarily occur?

Accepted Answer

In the alveoli of the lungs

Question 6

Which of the following factors would most likely decrease the rate of gas diffusion across the respiratory membrane?

Accepted Answer

Thickening of the alveolar membrane

Question 7

Which layer of the digestive tract is responsible for peristalsis?

Accepted Answer

Muscularis

Question 8

A patient has a blockage in the pancreatic duct. Which digestive process would be most affected?

Accepted Answer

Fat and carbohydrate digestion in the small intestine

Question 9

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

Accepted Answer

Producing bile to emulsify fats

Question 10

Which part of the nephron is primarily responsible for filtration of blood?

Accepted Answer

Glomerulus

Question 11

A patient presents with kidney failure. Which of the following is a common treatment to remove waste products from the blood?

Accepted Answer

Dialysis

Question 12

Which hormone is responsible for stimulating sperm production in the testes?

Accepted Answer

Follicle-stimulating hormone (FSH)

Question 13

Which of the following best describes the role of the alveoli in the lungs?

Accepted Answer

They are the site of gas exchange between air and blood

Question 14

Which process is responsible for moving urine from the kidneys to the bladder?

Accepted Answer

Peristalsis in the ureters

Question 15

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

Accepted Answer

Lipase – fats

Question 16

Which of the following is a function of the urinary system?

Accepted Answer

Regulation of blood pressure by controlling blood volume

Question 17

Which hormone increases water reabsorption in the kidneys?

Accepted Answer

Antidiuretic hormone (ADH)

Question 18

A patient with asthma experiences difficulty breathing due to airway constriction. Which of the following best explains the underlying cause?

Accepted Answer

Inflammation and constriction of the bronchioles

Question 19

Which of the following best describes the process of internal respiration?

Accepted Answer

Exchange of gases between blood and tissue cells

Question 20

Which phase of the ovarian cycle is characterized by the release of an egg from the ovary?

Accepted Answer

Ovulation

Study Guide: Respiratory, Digestive, Urinary, and Reproductive Systems

Study Guide - Practice Questions