Respiratory Therapy Test Bank Exam NEWEST
2026 ACTUAL EXAM COMPLETE QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+||BRAND
NEW!!
1. Which lung has three lobes?
Right lung
Bold italics rationale: The right lung contains
upper, middle, and lower lobes, while the left lung
has only two.
2. Normal adult respiratory rate is:
12–20 breaths per minute
Bold italics rationale: This range represents
normal resting ventilation in healthy adults.
3. The main stimulus for breathing in a healthy
individual is:
Elevated carbon dioxide levels
Bold italics rationale: Central chemoreceptors
respond primarily to increased PaCO₂ and
decreased pH.
4. What structure separates the thoracic and
abdominal cavities?
Diaphragm
, Bold italics rationale: The diaphragm is the
primary muscle of respiration and divides these
two cavities.
5. Which muscle is considered the primary muscle of
inspiration?
Diaphragm
Bold italics rationale: Contraction of the
diaphragm increases thoracic volume and draws
air into the lungs.
6. What is the normal pH range of arterial blood?
7.35–7.45
Bold italics rationale: This narrow range is
necessary to maintain cellular function and
enzyme activity.
7. Which gas is responsible for maintaining alveolar
stability?
Surfactant
Bold italics rationale: Surfactant reduces surface
tension and prevents alveolar collapse.
8. Where does gas exchange occur in the lungs?
Alveoli
Bold italics rationale: Alveoli have thin
, membranes and extensive capillary networks for
diffusion.
9. The trachea divides into the:
Right and left main bronchi
Bold italics rationale: These bronchi deliver air to
each lung.
10. What condition is characterized by airflow
obstruction and mucus production?
Chronic bronchitis
Bold italics rationale: Chronic bronchitis involves
productive cough and airway inflammation.
11. Which disease is associated with destruction
of alveolar walls?
Emphysema
Bold italics rationale: Emphysema reduces surface
area for gas exchange due to alveolar damage.
12. A patient with asthma primarily experiences:
Bronchoconstriction
Bold italics rationale: Asthma causes reversible
airway narrowing due to smooth muscle
constriction.
13. What is the normal PaO₂ on room air?
80–100 mmHg
2026 ACTUAL EXAM COMPLETE QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS) |ALREADY GRADED A+||BRAND
NEW!!
1. Which lung has three lobes?
Right lung
Bold italics rationale: The right lung contains
upper, middle, and lower lobes, while the left lung
has only two.
2. Normal adult respiratory rate is:
12–20 breaths per minute
Bold italics rationale: This range represents
normal resting ventilation in healthy adults.
3. The main stimulus for breathing in a healthy
individual is:
Elevated carbon dioxide levels
Bold italics rationale: Central chemoreceptors
respond primarily to increased PaCO₂ and
decreased pH.
4. What structure separates the thoracic and
abdominal cavities?
Diaphragm
, Bold italics rationale: The diaphragm is the
primary muscle of respiration and divides these
two cavities.
5. Which muscle is considered the primary muscle of
inspiration?
Diaphragm
Bold italics rationale: Contraction of the
diaphragm increases thoracic volume and draws
air into the lungs.
6. What is the normal pH range of arterial blood?
7.35–7.45
Bold italics rationale: This narrow range is
necessary to maintain cellular function and
enzyme activity.
7. Which gas is responsible for maintaining alveolar
stability?
Surfactant
Bold italics rationale: Surfactant reduces surface
tension and prevents alveolar collapse.
8. Where does gas exchange occur in the lungs?
Alveoli
Bold italics rationale: Alveoli have thin
, membranes and extensive capillary networks for
diffusion.
9. The trachea divides into the:
Right and left main bronchi
Bold italics rationale: These bronchi deliver air to
each lung.
10. What condition is characterized by airflow
obstruction and mucus production?
Chronic bronchitis
Bold italics rationale: Chronic bronchitis involves
productive cough and airway inflammation.
11. Which disease is associated with destruction
of alveolar walls?
Emphysema
Bold italics rationale: Emphysema reduces surface
area for gas exchange due to alveolar damage.
12. A patient with asthma primarily experiences:
Bronchoconstriction
Bold italics rationale: Asthma causes reversible
airway narrowing due to smooth muscle
constriction.
13. What is the normal PaO₂ on room air?
80–100 mmHg
