HESI RESPIRATORY SYSTEM A&P EXAM NEWEST 2026
QUESTIONS and CORRECT DETAILED ANSWERS with
RATIONALES ALREADY GRADED A+
SECTION A: BASIC STRUCTURE & FUNCTION
1.
The primary function of the respiratory system is to:
A. Digest food
B. Exchange gases
C. Pump blood
D. Filter urine
Answer: B
Rationale:
The respiratory system exchanges oxygen and carbon dioxide.
2.
Gas exchange occurs in the:
A. Bronchi
B. Trachea
C. Alveoli
D. Pharynx
Answer: C
Rationale:
Alveoli are tiny air sacs where oxygen and carbon dioxide exchange occurs.
, 3.
The diaphragm is important because it:
A. Filters air
B. Controls heart rate
C. Controls breathing
D. Produces mucus
Answer: C
Rationale:
Diaphragm contraction allows inhalation.
SECTION B: AIRWAY ANATOMY
4.
Which is part of the upper respiratory tract?
A. Bronchi
B. Alveoli
C. Nose
D. Lungs
Answer: C
Rationale:
Upper airway includes nose, pharynx, and larynx.
5.
Which structure prevents food from entering the airway?
QUESTIONS and CORRECT DETAILED ANSWERS with
RATIONALES ALREADY GRADED A+
SECTION A: BASIC STRUCTURE & FUNCTION
1.
The primary function of the respiratory system is to:
A. Digest food
B. Exchange gases
C. Pump blood
D. Filter urine
Answer: B
Rationale:
The respiratory system exchanges oxygen and carbon dioxide.
2.
Gas exchange occurs in the:
A. Bronchi
B. Trachea
C. Alveoli
D. Pharynx
Answer: C
Rationale:
Alveoli are tiny air sacs where oxygen and carbon dioxide exchange occurs.
, 3.
The diaphragm is important because it:
A. Filters air
B. Controls heart rate
C. Controls breathing
D. Produces mucus
Answer: C
Rationale:
Diaphragm contraction allows inhalation.
SECTION B: AIRWAY ANATOMY
4.
Which is part of the upper respiratory tract?
A. Bronchi
B. Alveoli
C. Nose
D. Lungs
Answer: C
Rationale:
Upper airway includes nose, pharynx, and larynx.
5.
Which structure prevents food from entering the airway?
