NBRC Cardiopulmonary Anatomy and Physiology 3

Question 1

Which equation is used to estimate alveolar oxygen partial pressure (PAO2)?

Accepted Answer

Alveolar gas equation

Answer

Fick equation

Answer

Henderson-Hasselbalch equation

Answer

Laplace equation

Question 2

Oxygen is primarily transported in the blood by:

Accepted Answer

Bound to hemoglobin

Answer

Dissolved in plasma

Answer

Bound to albumin

Answer

As bicarbonate ions

Question 3

An increase in 2,3-DPG causes which shift of the oxyhemoglobin dissociation curve?

Accepted Answer

Right shift, decreasing oxygen affinity

Answer

Left shift, increasing oxygen affinity

Answer

No change in the curve

Answer

Left shift, decreasing oxygen affinity

Question 4

The normal mixed venous oxygen saturation (SvO2) is approximately:

Accepted Answer

60–75%

Answer

40–50%

Answer

80–90%

Answer

95–100%

Question 5

Which chemoreceptors respond most rapidly to changes in PaCO2?

Accepted Answer

Central chemoreceptors in the medulla

Answer

Peripheral chemoreceptors in the carotid bodies

Answer

Pulmonary stretch receptors

Answer

J-receptors in lung parenchyma

Question 6

Compliance of the lung is defined as:

Accepted Answer

Change in volume per unit change in pressure

Answer

Change in pressure per unit change in volume

Answer

Airway resistance multiplied by flow rate

Answer

Work of breathing divided by tidal volume