BIOS 252 Week 5 Quiz Exam 2 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. The respiratory system primarily functions to:
A. Pump blood
B. Exchange gases
C. Digest food
D. Produce hormones
Correct Answer: B
Rationale: It facilitates oxygen intake and carbon dioxide removal.
2. The main organ of respiration is the:
A. Heart
B. Lung
C. Liver
D. Kidney
Correct Answer: B
Rationale: Lungs are responsible for gas exchange.
,3. Air enters the body through the:
A. Trachea
B. Bronchi
C. Nose
D. Alveolia
Correct Answer: C
Rationale: The nose filters, warms, and moistens air.
4. The trachea is also called the:
A. Voice box
B. Windpipe
C. Air sac
D. Bronchiole
Correct Answer: B
Rationale: It conducts air to the lungs.
5. Gas exchange occurs in the:
A. Bronchi
B. Trachea
C. Alveoli
D. Larynx
Correct Answer: C
Rationale: Alveoli have thin walls for diffusion of gases.
6. The diaphragm helps in:
,A. Blood circulation
B. Breathing
C. Digestion
D. Filtration
Correct Answer: B
Rationale: It contracts and relaxes to allow air movement.
7. During inhalation, the diaphragm:
A. Relaxes
B. Contracts
C. Stays still
D. Expands upward
Correct Answer: B
Rationale: Contraction increases chest volume.
8. Oxygen is transported in blood by:
A. Plasma
B. Hemoglobin
C. Platelets
D. Lymph
Correct Answer: B
Rationale: Hemoglobin binds oxygen in RBCs.
9. Carbon dioxide is mainly carried as:
, A. Oxygen
B. Bicarbonate ions
C. Hemoglobin
D. Platelets
Correct Answer: B
Rationale: Most CO₂ is transported in dissolved form.
10. The larynx is known as the:
A. Windpipe
B. Voice box
C. Air sac
D. Bronchiole
Correct Answer: B
Rationale: It produces sound and protects airway.
11. The bronchi branch into:
A. Alveoli
B. Bronchioles
C. Capillaries
D. Veins
Correct Answer: B
Rationale: Bronchioles are smaller airways.
12. Which gas is required for cellular respiration?
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. The respiratory system primarily functions to:
A. Pump blood
B. Exchange gases
C. Digest food
D. Produce hormones
Correct Answer: B
Rationale: It facilitates oxygen intake and carbon dioxide removal.
2. The main organ of respiration is the:
A. Heart
B. Lung
C. Liver
D. Kidney
Correct Answer: B
Rationale: Lungs are responsible for gas exchange.
,3. Air enters the body through the:
A. Trachea
B. Bronchi
C. Nose
D. Alveolia
Correct Answer: C
Rationale: The nose filters, warms, and moistens air.
4. The trachea is also called the:
A. Voice box
B. Windpipe
C. Air sac
D. Bronchiole
Correct Answer: B
Rationale: It conducts air to the lungs.
5. Gas exchange occurs in the:
A. Bronchi
B. Trachea
C. Alveoli
D. Larynx
Correct Answer: C
Rationale: Alveoli have thin walls for diffusion of gases.
6. The diaphragm helps in:
,A. Blood circulation
B. Breathing
C. Digestion
D. Filtration
Correct Answer: B
Rationale: It contracts and relaxes to allow air movement.
7. During inhalation, the diaphragm:
A. Relaxes
B. Contracts
C. Stays still
D. Expands upward
Correct Answer: B
Rationale: Contraction increases chest volume.
8. Oxygen is transported in blood by:
A. Plasma
B. Hemoglobin
C. Platelets
D. Lymph
Correct Answer: B
Rationale: Hemoglobin binds oxygen in RBCs.
9. Carbon dioxide is mainly carried as:
, A. Oxygen
B. Bicarbonate ions
C. Hemoglobin
D. Platelets
Correct Answer: B
Rationale: Most CO₂ is transported in dissolved form.
10. The larynx is known as the:
A. Windpipe
B. Voice box
C. Air sac
D. Bronchiole
Correct Answer: B
Rationale: It produces sound and protects airway.
11. The bronchi branch into:
A. Alveoli
B. Bronchioles
C. Capillaries
D. Veins
Correct Answer: B
Rationale: Bronchioles are smaller airways.
12. Which gas is required for cellular respiration?
