NBRC Cardiopulmonary Anatomy and Physiology

Question 1

Which of the following best describes the primary function of the alveoli?

Accepted Answer

Gas exchange between air and blood

Answer

Warming and humidifying inspired air

Answer

Filtering particulates from inhaled air

Answer

Producing surfactant only

Question 2

The normal partial pressure of oxygen (PaO2) in arterial blood at sea level is approximately:

Accepted Answer

80–100 mmHg

Answer

40 mmHg

Answer

60 mmHg

Answer

120 mmHg

Question 3

Which muscle is the primary muscle of inspiration?

Accepted Answer

Diaphragm

Answer

Internal intercostals

Answer

Sternocleidomastoid

Answer

Scalenes

Question 4

What is the Bohr effect?

Accepted Answer

Increased CO2 shifts the oxyhemoglobin curve right

Answer

Increased CO2 shifts the oxyhemoglobin curve left

Answer

Decreased temperature shifts the curve right

Answer

Increased pH shifts the curve right

Question 5

Which lung zone, according to the West zones model, has the greatest blood flow?

Accepted Answer

Zone 3 (base)

Answer

Zone 1 (apex)

Answer

Zone 2 (mid-lung)

Answer

Zone 4 (extreme base)

Question 6

Normal cardiac output at rest is approximately:

Accepted Answer

5–6 L/min

Answer

1–2 L/min

Answer

3–4 L/min

Answer

8–10 L/min