The Physiology of Blood Gas Transport Quiz

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What is the primary effect of CO2 on blood pH?

Neutralizing blood pH

Decreasing blood pH (correct)

No effect on blood pH

Increasing blood pH

Where is CO2 primarily transported in the blood?

Stored in the liver

Bound to red blood cells

Transported in the lymphatic system

Dissolved in plasma (correct)

What is the main function of carbonic anhydrase in CO2 transport?

Breaks down CO2 into oxygen and carbon

Stimulates the release of CO2 from hemoglobin

Catalyzes the conversion of CO2 and water into carbonic acid (correct)

Increases the affinity of hemoglobin for oxygen

What is the primary source of H+ in the blood?

Lactic acid (B) Signup and view all the answers

How does increasing ventilation affect the acid-base balance?

Corrects acid-base balance by blowing off CO2 (C) Signup and view all the answers

What is hyperpnea?

Hyperventilation (D) Signup and view all the answers

What is the Haldane effect related to?

Oxygen binding to hemoglobin (C) Signup and view all the answers

What is the primary function of the bicarbonate buffering system?

Maintaining blood pH (B) Signup and view all the answers

What happens to the a-vO2 difference during submax steady-state exercise?

It remains constant (D) Signup and view all the answers

What is the primary function of the kidneys in acid-base balance?

Removing H+ from the blood (A) Signup and view all the answers

What stimulates the respiratory system, including ventilation?

3% CO2 in the atmosphere (D) Signup and view all the answers

What happens to the A-a (alveolar to arterial) PO2 difference during incremental exercise?

It increases (D) Signup and view all the answers

What happens to venous blood saturation as workload increases during incremental exercise?

It decreases and then plateaus around 80% intensity (B) Signup and view all the answers

What is the definition of exercise-induced arterial hypoxemia (EIAH)?

Condition when O2 carried in arterial blood is severely reduced (C) Signup and view all the answers

What happens to the oxygen levels in the blood as muscle workload increases during incremental exercise?

Oxygen levels plateau around 50% (A) Signup and view all the answers

What is the effect of higher intensity exercise on arterial CO2 levels?

Arterial CO2 levels drop off (A) Signup and view all the answers

What is the atmospheric pressure at sea level?

760 mm Hg (A) Signup and view all the answers

What is the percentage of oxygen in the room based on the given information?

21% (C) Signup and view all the answers

What is the definition of mild exercise-induced arterial hypoxemia (EIAH)?

Arterial blood oxygen reduced to 93-95% (A) Signup and view all the answers

What happens to the oxygen levels at maximal exercise compared to rest?

Alveolar and arterial PO2 at maximal exercise are higher than at rest (B) Signup and view all the answers