NU 110 EXAM 2 RESPIRATORY SYSTEM ,CARDIOVASCULAR
,SKELETAL ,INTEGUMENTARY,MUSCULAR *COMPLETE*|
FREQUENTLY MOST TESTED QUESTIONS AND 100% ACCURATE |
RATIONALIZED , REVIEWED AND UPDATED | NEWEST VERSION
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1. What is the PRIMARY function of the respiratory system?
A. Pump blood
B. Deliver oxygen and remove carbon dioxide
C. Produce hormones
D. Digest food
Correct Answer: B
Rationale:
The respiratory system’s main role is gas exchange:
• Oxygen (O₂) → needed for cellular metabolism
• Carbon dioxide (CO₂) → waste product that must be removed
If CO₂ builds up → acidosis → life-threatening imbalance
2. How does the respiratory system help maintain acid-base balance?
A. By producing insulin
B. By regulating carbon dioxide levels
C. By filtering blood
D. By controlling sodium
Correct Answer: B
Rationale:
CO₂ acts as an acid in the body.
• ↑ CO₂ → ↓ pH → respiratory acidosis
, • ↓ CO₂ → ↑ pH → respiratory alkalosis
This is why breathing rate directly affects pH.
3. What is the function of the alveoli?
A. Move air
B. Exchange gases
C. Protect airway
D. Produce mucus
Correct Answer: B
Rationale:
Alveoli are tiny air sacs where:
• O₂ diffuses into blood
• CO₂ diffuses out
This is the ONLY place where gas exchange occurs
4. A patient has pneumonia. Why does hypoxia occur?
A. Bronchi collapse
B. Fluid fills alveoli
C. Increased oxygen intake
D. Increased airflow
Correct Answer: B
Rationale:
Pneumonia → fluid/pus in alveoli
Blocks gas exchange → low oxygen levels (hypoxia)
5. What is the function of the bronchi?
A. Gas exchange
B. Direct air into lungs
C. Produce oxygen
D. Remove CO₂
Correct Answer: B
,Rationale:
Bronchi are airway passages that carry air into lungs
They do NOT exchange gases — alveoli do
6. In asthma, what happens in the bronchi?
A. Dilate
B. Constrict
C. Collapse
D. Fill with blood
Correct Answer: B
Rationale:
Asthma = bronchoconstriction + inflammation
Narrow airways → difficulty breathing
7. Why is carbon dioxide important in the body?
A. It provides oxygen
B. It acts as an acid
C. It builds muscle
D. It increases energy
Correct Answer: B
Rationale:
balance CO₂ combines with water → forms carbonic acid
Helps regulate pH
8. A patient retains CO₂. What happens to pH?
A. Increases
B. Decreases
C. No change
D. Becomes neutral
Correct Answer: B
Rationale:
↑ CO₂ = ↑ acid → ↓ pH → respiratory acidosis
, 9. What is the role of the pharynx?
A. Gas exchange
B. Shared passage for air and food
C. Produces sound
D. Filters blood
Correct Answer: B
Rationale:
Pharynx connects:
• Nose/mouth → airway
• Mouth → digestive system
Important intersection point
10. What is the function of the epiglottis?
A. Produce sound
B. Close airway during swallowing
C. Exchange gases
D. Move air
Correct Answer: B
Rationale:
Epiglottis prevents food/liquid from entering lungs
Critical for aspiration prevention
11. Failure of epiglottis function leads to:
A. Increased oxygen
B. Aspiration
C. Improved breathing
D. Increased CO₂ removal
Correct Answer: B
Rationale:
Food/liquid enters airway → aspiration pneumonia risk
12. What is the primary function of the larynx?
,SKELETAL ,INTEGUMENTARY,MUSCULAR *COMPLETE*|
FREQUENTLY MOST TESTED QUESTIONS AND 100% ACCURATE |
RATIONALIZED , REVIEWED AND UPDATED | NEWEST VERSION
!!!
1. What is the PRIMARY function of the respiratory system?
A. Pump blood
B. Deliver oxygen and remove carbon dioxide
C. Produce hormones
D. Digest food
Correct Answer: B
Rationale:
The respiratory system’s main role is gas exchange:
• Oxygen (O₂) → needed for cellular metabolism
• Carbon dioxide (CO₂) → waste product that must be removed
If CO₂ builds up → acidosis → life-threatening imbalance
2. How does the respiratory system help maintain acid-base balance?
A. By producing insulin
B. By regulating carbon dioxide levels
C. By filtering blood
D. By controlling sodium
Correct Answer: B
Rationale:
CO₂ acts as an acid in the body.
• ↑ CO₂ → ↓ pH → respiratory acidosis
, • ↓ CO₂ → ↑ pH → respiratory alkalosis
This is why breathing rate directly affects pH.
3. What is the function of the alveoli?
A. Move air
B. Exchange gases
C. Protect airway
D. Produce mucus
Correct Answer: B
Rationale:
Alveoli are tiny air sacs where:
• O₂ diffuses into blood
• CO₂ diffuses out
This is the ONLY place where gas exchange occurs
4. A patient has pneumonia. Why does hypoxia occur?
A. Bronchi collapse
B. Fluid fills alveoli
C. Increased oxygen intake
D. Increased airflow
Correct Answer: B
Rationale:
Pneumonia → fluid/pus in alveoli
Blocks gas exchange → low oxygen levels (hypoxia)
5. What is the function of the bronchi?
A. Gas exchange
B. Direct air into lungs
C. Produce oxygen
D. Remove CO₂
Correct Answer: B
,Rationale:
Bronchi are airway passages that carry air into lungs
They do NOT exchange gases — alveoli do
6. In asthma, what happens in the bronchi?
A. Dilate
B. Constrict
C. Collapse
D. Fill with blood
Correct Answer: B
Rationale:
Asthma = bronchoconstriction + inflammation
Narrow airways → difficulty breathing
7. Why is carbon dioxide important in the body?
A. It provides oxygen
B. It acts as an acid
C. It builds muscle
D. It increases energy
Correct Answer: B
Rationale:
balance CO₂ combines with water → forms carbonic acid
Helps regulate pH
8. A patient retains CO₂. What happens to pH?
A. Increases
B. Decreases
C. No change
D. Becomes neutral
Correct Answer: B
Rationale:
↑ CO₂ = ↑ acid → ↓ pH → respiratory acidosis
, 9. What is the role of the pharynx?
A. Gas exchange
B. Shared passage for air and food
C. Produces sound
D. Filters blood
Correct Answer: B
Rationale:
Pharynx connects:
• Nose/mouth → airway
• Mouth → digestive system
Important intersection point
10. What is the function of the epiglottis?
A. Produce sound
B. Close airway during swallowing
C. Exchange gases
D. Move air
Correct Answer: B
Rationale:
Epiglottis prevents food/liquid from entering lungs
Critical for aspiration prevention
11. Failure of epiglottis function leads to:
A. Increased oxygen
B. Aspiration
C. Improved breathing
D. Increased CO₂ removal
Correct Answer: B
Rationale:
Food/liquid enters airway → aspiration pneumonia risk
12. What is the primary function of the larynx?
