BIOS 252 Week 2 Quiz Exam 1 (Latest
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which organ is the primary organ of the respiratory system?
A. Heart
B. Lung
C. Kidney
D. Liver
Correct answer: B
Rationale: Lungs are responsible for gas exchange.
2. The process of breathing is called:
A. Circulation
B. Respiration
C. Ventilation
D. Diffusion
Correct answer: C
Rationale: Ventilation refers to movement of air in and out.
,3. Gas exchange occurs in the:
A. Bronchi
B. Trachea
C. Alveoli
D. Larynx
Correct answer: C
Rationale: Alveoli allow oxygen and carbon dioxide exchange.
4. The windpipe is also called the:
A. Bronchus
B. Trachea
C. Larynx
D. Pharynx
Correct answer: B
Rationale: Trachea conducts air to lungs.
5. The voice box is the:
A. Pharynx
B. Larynx
C. Trachea
D. Bronchiole
Correct answer: B
Rationale: Contains vocal cords.
,6. The diaphragm is a:
A. Bone
B. Muscle
C. Ligament
D. Organ
Correct answer: B
Rationale: Controls breathing movements.
7. During inhalation, the diaphragm:
A. Relaxes
B. Contracts
C. Expands upward
D. Stops moving
Correct answer: B
Rationale: Moves downward to allow lung expansion.
8. During exhalation, the diaphragm:
A. Contracts
B. Relaxes
C. Moves downward
D. Expands
Correct answer: B
Rationale: Moves upward reducing lung volume.
, 9. Oxygen is transported in blood by:
A. Plasma
B. Platelets
C. Hemoglobin
D. WBC
Correct answer: C
Rationale: Hemoglobin binds oxygen.
10. Carbon dioxide is transported mainly as:
A. Oxygen
B. Bicarbonate ions
C. Protein
D. Lipid
Correct answer: B
Rationale: CO₂ is converted to bicarbonate in blood.
11. External respiration occurs between:
A. Cells and blood
B. Lungs and blood
C. Blood and tissues
D. Heart and lungs
Correct answer: B
Rationale: Gas exchange in lungs.
Update ) Anatomy and
Physiology IV with Lab | Questions &
Answers | 100% Correct | Grade A -
Chamberlain
1. Which organ is the primary organ of the respiratory system?
A. Heart
B. Lung
C. Kidney
D. Liver
Correct answer: B
Rationale: Lungs are responsible for gas exchange.
2. The process of breathing is called:
A. Circulation
B. Respiration
C. Ventilation
D. Diffusion
Correct answer: C
Rationale: Ventilation refers to movement of air in and out.
,3. Gas exchange occurs in the:
A. Bronchi
B. Trachea
C. Alveoli
D. Larynx
Correct answer: C
Rationale: Alveoli allow oxygen and carbon dioxide exchange.
4. The windpipe is also called the:
A. Bronchus
B. Trachea
C. Larynx
D. Pharynx
Correct answer: B
Rationale: Trachea conducts air to lungs.
5. The voice box is the:
A. Pharynx
B. Larynx
C. Trachea
D. Bronchiole
Correct answer: B
Rationale: Contains vocal cords.
,6. The diaphragm is a:
A. Bone
B. Muscle
C. Ligament
D. Organ
Correct answer: B
Rationale: Controls breathing movements.
7. During inhalation, the diaphragm:
A. Relaxes
B. Contracts
C. Expands upward
D. Stops moving
Correct answer: B
Rationale: Moves downward to allow lung expansion.
8. During exhalation, the diaphragm:
A. Contracts
B. Relaxes
C. Moves downward
D. Expands
Correct answer: B
Rationale: Moves upward reducing lung volume.
, 9. Oxygen is transported in blood by:
A. Plasma
B. Platelets
C. Hemoglobin
D. WBC
Correct answer: C
Rationale: Hemoglobin binds oxygen.
10. Carbon dioxide is transported mainly as:
A. Oxygen
B. Bicarbonate ions
C. Protein
D. Lipid
Correct answer: B
Rationale: CO₂ is converted to bicarbonate in blood.
11. External respiration occurs between:
A. Cells and blood
B. Lungs and blood
C. Blood and tissues
D. Heart and lungs
Correct answer: B
Rationale: Gas exchange in lungs.
