BIOS 256 Anatomy & Physiology IV
Exam 2 (Latest Update )
Anatomy and Physiology IV with Lab |
Questions & Answers | 100% Correct |
Grade A - Chamberlain
1. The primary function of the respiratory system is:
A. Gas exchange
B. Digestion
C. Circulation
D. Excretion
Correct Answer: A. Gas exchange
Rationale: The respiratory system brings in oxygen and removes
carbon dioxide.
2. The structure that connects the larynx to the bronchi is the:
A. Trachea
B. Pharynx
C. Bronchiole
D. Alveolus
Correct Answer: A. Trachea
Rationale: The trachea conducts air from the larynx to the bronchi.
,3. The site of gas exchange in the lungs is:
A. Alveoli
B. Bronchi
C. Trachea
D. Larynx
Correct Answer: A. Alveoli
Rationale: Alveoli are tiny air sacs where oxygen and carbon
dioxide diffuse.
4. The primary muscle of inspiration is the:
A. Diaphragm
B. Intercostals
C. Sternocleidomastoid
D. Abdominals
Correct Answer: A. Diaphragm
Rationale: Contraction of the diaphragm increases thoracic volume,
drawing air in.
5. During inhalation, the diaphragm:
A. Contracts and moves downward
B. Relaxes and moves upward
C. Contracts and moves upward
D. Relaxes and stays stationary
Correct Answer: A. Contracts and moves downward
Rationale: Downward movement increases thoracic cavity volume.
,6. The term for the exchange of oxygen and carbon dioxide
between alveoli and blood is:
A. External respiration
B. Internal respiration
C. Cellular respiration
D. Pulmonary ventilation
Correct Answer: A. External respiration
Rationale: Occurs in the lungs at the alveolar-capillary interface.
7. The exchange of gases between blood and tissues is called:
A. Internal respiration
B. External respiration
C. Pulmonary ventilation
D. Cellular respiration
Correct Answer: A. Internal respiration
Rationale: Oxygen diffuses from blood to tissues and carbon dioxide
moves from tissues to blood.
8. The amount of air left in lungs after maximal exhalation is:
A. Residual volume
B. Tidal volume
C. Inspiratory reserve volume
D. Expiratory reserve volume
Correct Answer: A. Residual volume
, Rationale: Prevents lung collapse and maintains gas exchange
between breaths.
9. The normal volume of air inhaled or exhaled in a quiet breath
is:
A. Tidal volume
B. Residual volume
C. Vital capacity
D. Inspiratory reserve volume
Correct Answer: A. Tidal volume
Rationale: Typically about 500 mL in adults.
10. The total lung capacity includes:
A. Vital capacity + residual volume
B. Tidal volume only
C. Residual volume only
D. Inspiratory reserve volume only
Correct Answer: A. Vital capacity + residual volume
Rationale: Represents maximum volume the lungs can hold.
11. The part of the brain that controls basic rhythm of breathing
is:
A. Medulla oblongata
B. Cerebellum
C. Hypothalamus
Exam 2 (Latest Update )
Anatomy and Physiology IV with Lab |
Questions & Answers | 100% Correct |
Grade A - Chamberlain
1. The primary function of the respiratory system is:
A. Gas exchange
B. Digestion
C. Circulation
D. Excretion
Correct Answer: A. Gas exchange
Rationale: The respiratory system brings in oxygen and removes
carbon dioxide.
2. The structure that connects the larynx to the bronchi is the:
A. Trachea
B. Pharynx
C. Bronchiole
D. Alveolus
Correct Answer: A. Trachea
Rationale: The trachea conducts air from the larynx to the bronchi.
,3. The site of gas exchange in the lungs is:
A. Alveoli
B. Bronchi
C. Trachea
D. Larynx
Correct Answer: A. Alveoli
Rationale: Alveoli are tiny air sacs where oxygen and carbon
dioxide diffuse.
4. The primary muscle of inspiration is the:
A. Diaphragm
B. Intercostals
C. Sternocleidomastoid
D. Abdominals
Correct Answer: A. Diaphragm
Rationale: Contraction of the diaphragm increases thoracic volume,
drawing air in.
5. During inhalation, the diaphragm:
A. Contracts and moves downward
B. Relaxes and moves upward
C. Contracts and moves upward
D. Relaxes and stays stationary
Correct Answer: A. Contracts and moves downward
Rationale: Downward movement increases thoracic cavity volume.
,6. The term for the exchange of oxygen and carbon dioxide
between alveoli and blood is:
A. External respiration
B. Internal respiration
C. Cellular respiration
D. Pulmonary ventilation
Correct Answer: A. External respiration
Rationale: Occurs in the lungs at the alveolar-capillary interface.
7. The exchange of gases between blood and tissues is called:
A. Internal respiration
B. External respiration
C. Pulmonary ventilation
D. Cellular respiration
Correct Answer: A. Internal respiration
Rationale: Oxygen diffuses from blood to tissues and carbon dioxide
moves from tissues to blood.
8. The amount of air left in lungs after maximal exhalation is:
A. Residual volume
B. Tidal volume
C. Inspiratory reserve volume
D. Expiratory reserve volume
Correct Answer: A. Residual volume
, Rationale: Prevents lung collapse and maintains gas exchange
between breaths.
9. The normal volume of air inhaled or exhaled in a quiet breath
is:
A. Tidal volume
B. Residual volume
C. Vital capacity
D. Inspiratory reserve volume
Correct Answer: A. Tidal volume
Rationale: Typically about 500 mL in adults.
10. The total lung capacity includes:
A. Vital capacity + residual volume
B. Tidal volume only
C. Residual volume only
D. Inspiratory reserve volume only
Correct Answer: A. Vital capacity + residual volume
Rationale: Represents maximum volume the lungs can hold.
11. The part of the brain that controls basic rhythm of breathing
is:
A. Medulla oblongata
B. Cerebellum
C. Hypothalamus
