Exploring the Gas Transport Mechanisms in the Respiratory System

What percentage of oxygen is transported dissolved in plasma?

• 1.5%

• 70%

• 98.5%

• 23%

What is the maximum number of oxygen molecules a single hemoglobin molecule can transport?

• 3

• 2

• 4

• 1

What effect increases hemoglobin's affinity for oxygen as its saturation increases?

• Haldane effect

• Cooperative binding

• Chloride shift

• Bohr effect

At what partial pressure of oxygen is hemoglobin in the lungs 98% saturated?

• 40 mmHg

• 80 mmHg

• 100 mmHg

• 20 mmHg

Which factor does NOT cause a right shift in the oxygen-hemoglobin dissociation curve?

• Increased pH

• Increased PCO2

• Increased BPG

• Increased temperature

What percentage of carbon dioxide is transported as bicarbonate ions in plasma?

• 70%

• 23%

• 7%

• 98.5%

What enzyme catalyzes the conversion of carbon dioxide and water into carbonic acid?

• Hemoglobin

• Carbonic anhydrase

• Bicarbonate ionase

• Chloride shiftase

What is the primary effect of the Haldane effect?

• Oxygen loading increases carbon dioxide unloading.

• Carbon dioxide loading increases oxygen unloading.

• Decreased temperature increases oxygen loading.

• Increased pH increases oxygen unloading.

What does the Bohr effect describe?

• The affinity of hemoglobin for oxygen decreases as carbon dioxide concentration increases.

• The affinity of hemoglobin for oxygen decreases with higher pH.

• The affinity of hemoglobin for oxygen increases as carbon dioxide concentration decreases.

• The affinity of hemoglobin for oxygen increases with higher pH.

Which of the following is NOT a way carbon dioxide is transported in the blood?

• Dissolved in plasma

• Converted to bicarbonate ions

• Bound to oxygen molecules

• Bound to hemoglobin as carbaminohemoglobin