BIOS 256 Week 6 Quiz Exam 2 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A –
Chamberlain
1. Which type of respiration occurs at the cellular level?
A. External respiration
B. Internal respiration
C. Cellular respiration
D. Pulmonary ventilation
Correct Answer: C
Rationale: Cellular respiration occurs in the mitochondria to
produce ATP.
2. What is the main waste product of cellular respiration?
A. Oxygen
B. Carbon dioxide
C. Water
D. Nitrogen
Correct Answer: B
Rationale: Carbon dioxide is generated as a byproduct of ATP
production.
,3. Which structure delivers oxygen-rich blood from the lungs to
the heart?
A. Pulmonary artery
B. Pulmonary vein
C. Aorta
D. Vena cava
Correct Answer: B
Rationale: Pulmonary veins carry oxygenated blood to the left
atrium.
4. What is the primary function of the trachea?
A. Exchange gases
B. Conduct air to lungs
C. Produce mucus
D. Generate sound
Correct Answer: B
Rationale: The trachea serves as a passageway for air.
5. What happens to oxygen in alveoli?
A. It reacts with CO₂
B. It diffuses into the blood
C. It is exhaled
D. It is stored in alveoli
Correct Answer: B
,Rationale: Oxygen diffuses across the alveolar membrane into
capillaries.
6. Which gas primarily regulates the breathing rate?
A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Helium
Correct Answer: B
Rationale: CO₂ levels in the blood stimulate chemoreceptors to
adjust respiration.
7. What is the primary role of hemoglobin?
A. Transport CO₂
B. Transport oxygen
C. Produce energy
D. Fight infection
Correct Answer: B
Rationale: Hemoglobin binds oxygen for transport in red blood
cells.
8. Which disease is characterized by alveolar destruction?
A. Asthma
B. Emphysema
C. Bronchitis
, D. Pneumonia
Correct Answer: B
Rationale: Emphysema damages alveoli and reduces gas exchange.
9. What is the function of surfactant in alveoli?
A. Facilitate oxygen transport
B. Prevent alveolar collapse
C. Increase mucus production
D. Stimulate diaphragm movement
Correct Answer: B
Rationale: Surfactant reduces surface tension to keep alveoli open.
10. Which structure prevents food from entering the airway?
A. Pharynx
B. Epiglottis
C. Larynx
D. Bronchi
Correct Answer: B
Rationale: The epiglottis covers the trachea during swallowing.
11. What is tidal volume?
A. Maximum air exhaled
B. Air inhaled/exhaled during normal breathing
C. Air left in lungs after exhalation
D. Forced air volume
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A –
Chamberlain
1. Which type of respiration occurs at the cellular level?
A. External respiration
B. Internal respiration
C. Cellular respiration
D. Pulmonary ventilation
Correct Answer: C
Rationale: Cellular respiration occurs in the mitochondria to
produce ATP.
2. What is the main waste product of cellular respiration?
A. Oxygen
B. Carbon dioxide
C. Water
D. Nitrogen
Correct Answer: B
Rationale: Carbon dioxide is generated as a byproduct of ATP
production.
,3. Which structure delivers oxygen-rich blood from the lungs to
the heart?
A. Pulmonary artery
B. Pulmonary vein
C. Aorta
D. Vena cava
Correct Answer: B
Rationale: Pulmonary veins carry oxygenated blood to the left
atrium.
4. What is the primary function of the trachea?
A. Exchange gases
B. Conduct air to lungs
C. Produce mucus
D. Generate sound
Correct Answer: B
Rationale: The trachea serves as a passageway for air.
5. What happens to oxygen in alveoli?
A. It reacts with CO₂
B. It diffuses into the blood
C. It is exhaled
D. It is stored in alveoli
Correct Answer: B
,Rationale: Oxygen diffuses across the alveolar membrane into
capillaries.
6. Which gas primarily regulates the breathing rate?
A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Helium
Correct Answer: B
Rationale: CO₂ levels in the blood stimulate chemoreceptors to
adjust respiration.
7. What is the primary role of hemoglobin?
A. Transport CO₂
B. Transport oxygen
C. Produce energy
D. Fight infection
Correct Answer: B
Rationale: Hemoglobin binds oxygen for transport in red blood
cells.
8. Which disease is characterized by alveolar destruction?
A. Asthma
B. Emphysema
C. Bronchitis
, D. Pneumonia
Correct Answer: B
Rationale: Emphysema damages alveoli and reduces gas exchange.
9. What is the function of surfactant in alveoli?
A. Facilitate oxygen transport
B. Prevent alveolar collapse
C. Increase mucus production
D. Stimulate diaphragm movement
Correct Answer: B
Rationale: Surfactant reduces surface tension to keep alveoli open.
10. Which structure prevents food from entering the airway?
A. Pharynx
B. Epiglottis
C. Larynx
D. Bronchi
Correct Answer: B
Rationale: The epiglottis covers the trachea during swallowing.
11. What is tidal volume?
A. Maximum air exhaled
B. Air inhaled/exhaled during normal breathing
C. Air left in lungs after exhalation
D. Forced air volume
