WGU - D313 - Anatomy and Physiology 2 Practice Test (Latest 2026 / 2027 Update) Questions & Answers | Grade A | 100% Correct

WGU - D313 - Anatomy and Physiology 2
Practice Test (Latest Update)
Questions & Answers | Grade A | 100% Correct
1. The main function of the respiratory system is to: A. Produce hormones B. Transport
nutrients C. Exchange oxygen and carbon dioxide D. Regulation of body temperature
C. Exchange oxygen and carbon dioxide
2. Which structure separates the thoracic cavity from the abdominal cavity? A. Diaphragm
B. Pericardium C. Pleura D. Bronchi A. Diaphragm

3. Which of the following is NOT a function of the respiratory system? A. Regulation of
blood pH B. Exchange of gases C. Production of red blood cells D. Filter of harmful
particles C. Production of red blood cells

4. Where does gas exchange occur in the lungs? A. Trachea B. Alveoli C. Bronchioles D.
Bronchi B. Alveoli

5. The process by which oxygen and carbon dioxide are exchanged between the blood and
body tissues is called: A. Respiration B. Ventilation C. Diffusion D. Inhalation C.
Diffusion
6. Which of the following structures is part of the upper respiratory tract? A. Larynx B.
Bronchi C. Trachea D. Alveoli A. Larynx

7. The branching tubes that carry air from the trachea to the alveoli are called: A. Trachea B.
Bronchi C. Lungs D. Diaphragm B. Bronchi

8. Which of the following is NOT a function of the nasal cavity? A. Filter air B. Warm and
humidify air C. Exchange gases D. Detect odors C. Exchange gases

9. The epiglottis is a flap of tissue that prevents food from entering the: A. Esophagus B.
Larynx C. Trachea D. Bronchi C. Trachea

10. The trachea is also known as the: A. Windpipe B. Gullet C. Bronchi D. Alveoli A.
Windpipe

11. Which of the following is a component of the lower respiratory tract? A. Larynx B.
Pharynx C. Trachea D. Bronchioles D. Bronchioles

12. The process of inhaling and exhaling air is known as: A. Ventilation B. Respiration C.
Circulation D. Oxygenation A. Ventilation

, 13. The primary function of the cardiovascular system is to: A. Exchange gases B. Digest
food C. Transport nutrients, oxygen, and waste products D. Regulate body temperature
C. Transport nutrients, oxygen, and waste products

14. The structures that carry oxygenated blood away from the heart are called: A. Arteries B.
Capillaries C. Veins D. Valves A. Arteries

15. The heart pumps blood to the lungs through the: A. Pulmonary artery B. Pulmonary vein
C. Aorta D. Vena cava A. Pulmonary artery

16. Which chamber of the heart receives deoxygenated blood from the body? A. Right atrium
B. Right ventricle C. Left atrium D. Left ventricle A. Right atrium

17. The heart valve that separates the right atrium from the right ventricle is called the: A.
Aortic valve B. Bicuspid valve C. Pulmonary valve D. Tricuspid valve D. Tricuspid
valve

18. The largest artery in the body that carries oxygenated blood from the heart to the rest of
the body is called the: A. Aorta B. Pulmonary artery C. Coronary artery D. Carotid artery
A. Aorta

19. The smallest blood vessels in the body where gas exchange occurs are called: A. Arteries
B. Capillaries C. Veins D. Venules B. Capillaries

20. The process by which blood clots to stop bleeding is called: A. Coagulation B.
Hemostasis C. Vasodilation D. Vasoconstriction A. Coagulation

21. The liquid component of blood that carries nutrients, hormones, and waste products is
called: A. Platelets B. Plasma C. Red blood cells D. White blood cells

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