BIOS 256 Week 6 Quiz Exam 1 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A –
Chamberlain
1. What is the primary function of the respiratory system?
A. Transport nutrients
B. Exchange gases
C. Produce hormones
D. Regulate temperature
Correct Answer: B
Rationale: The respiratory system facilitates oxygen intake and
carbon dioxide removal.
2. Which organ is the main site of gas exchange?
A. Trachea
B. Bronchi
C. Lungs
D. Diaphragm
Correct Answer: C
Rationale: Gas exchange occurs in the alveoli within the lungs.
,3. What structure prevents food from entering the trachea?
A. Larynx
B. Epiglottis
C. Pharynx
D. Bronchi
Correct Answer: B
Rationale: The epiglottis closes over the trachea during swallowing.
4. Which muscle is primarily responsible for breathing?
A. Intercostal muscles
B. Diaphragm
C. Abdominal muscles
D. Pectoral muscles
Correct Answer: B
Rationale: The diaphragm contracts and relaxes to control
breathing.
5. What is the function of alveoli?
A. Filter air
B. Produce mucus
C. Gas exchange
D. Control airflow
Correct Answer: C
Rationale: Alveoli allow oxygen and carbon dioxide to diffuse
between air and blood.
,6. Which gas is transported from tissues to the lungs?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Hydrogen
Correct Answer: C
Rationale: Carbon dioxide is a waste gas carried to the lungs for
removal.
7. What is the role of hemoglobin?
A. Fight infection
B. Carry oxygen
C. Produce energy
D. Digest food
Correct Answer: B
Rationale: Hemoglobin binds and transports oxygen in red blood
cells.
8. Which structure connects the throat to the lungs?
A. Esophagus
B. Trachea
C. Pharynx
D. Larynx
Correct Answer: B
Rationale: The trachea conducts air to the lungs.
, 9. What is the function of the nasal cavity?
A. Digest food
B. Filter and warm air
C. Pump blood
D. Store oxygen
Correct Answer: B
Rationale: The nasal cavity filters, moistens, and warms incoming
air.
10. Which process moves air into the lungs?
A. Expiration
B. Inspiration
C. Diffusion
D. Circulation
Correct Answer: B
Rationale: Inspiration is the process of inhaling air.
11. What is tidal volume?
A. Maximum air capacity
B. Air breathed in normal breath
C. Air left in lungs
D. Forced air exhaled
Correct Answer: B
Rationale: Tidal volume is the amount of air inhaled or exhaled
during normal breathing.
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A –
Chamberlain
1. What is the primary function of the respiratory system?
A. Transport nutrients
B. Exchange gases
C. Produce hormones
D. Regulate temperature
Correct Answer: B
Rationale: The respiratory system facilitates oxygen intake and
carbon dioxide removal.
2. Which organ is the main site of gas exchange?
A. Trachea
B. Bronchi
C. Lungs
D. Diaphragm
Correct Answer: C
Rationale: Gas exchange occurs in the alveoli within the lungs.
,3. What structure prevents food from entering the trachea?
A. Larynx
B. Epiglottis
C. Pharynx
D. Bronchi
Correct Answer: B
Rationale: The epiglottis closes over the trachea during swallowing.
4. Which muscle is primarily responsible for breathing?
A. Intercostal muscles
B. Diaphragm
C. Abdominal muscles
D. Pectoral muscles
Correct Answer: B
Rationale: The diaphragm contracts and relaxes to control
breathing.
5. What is the function of alveoli?
A. Filter air
B. Produce mucus
C. Gas exchange
D. Control airflow
Correct Answer: C
Rationale: Alveoli allow oxygen and carbon dioxide to diffuse
between air and blood.
,6. Which gas is transported from tissues to the lungs?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Hydrogen
Correct Answer: C
Rationale: Carbon dioxide is a waste gas carried to the lungs for
removal.
7. What is the role of hemoglobin?
A. Fight infection
B. Carry oxygen
C. Produce energy
D. Digest food
Correct Answer: B
Rationale: Hemoglobin binds and transports oxygen in red blood
cells.
8. Which structure connects the throat to the lungs?
A. Esophagus
B. Trachea
C. Pharynx
D. Larynx
Correct Answer: B
Rationale: The trachea conducts air to the lungs.
, 9. What is the function of the nasal cavity?
A. Digest food
B. Filter and warm air
C. Pump blood
D. Store oxygen
Correct Answer: B
Rationale: The nasal cavity filters, moistens, and warms incoming
air.
10. Which process moves air into the lungs?
A. Expiration
B. Inspiration
C. Diffusion
D. Circulation
Correct Answer: B
Rationale: Inspiration is the process of inhaling air.
11. What is tidal volume?
A. Maximum air capacity
B. Air breathed in normal breath
C. Air left in lungs
D. Forced air exhaled
Correct Answer: B
Rationale: Tidal volume is the amount of air inhaled or exhaled
during normal breathing.
