Which statement about the diaphragm is TRUE?

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Respiratory System Questions Questions

Question 1 of 5

Which statement about the diaphragm is TRUE?

A. It is an expiratory muscle B. It increases anteroposterior diameter of chest C. It is supplied by the vagus nerve D. It helps lungs to collapse

Correct Answer: B

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 2 of 5

What is the partial pressure of CO₂ in alveolar air?

A. 50 mmHg B. 40 mmHg C. 30 mmHg D. 45 mmHg

Correct Answer: B

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 3 of 5

What is the role of lung surfactant?

A. Prevents collapse of alveoli B. Prevents lung edema C. Increases lung compliance D. All of the above

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 4 of 5

How much oxygen can 100 mL of plasma carry?

A. 3 mL B. 10 mL C. 20 mL D. 0.3 mL

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Question 5 of 5

Pulmonary vessels, nerves, and a bronchus enter or leave the lung at the:

A. Cardiac notch B. Apex C. Capsule D. Hilus

Correct Answer: D

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

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