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External Respiration Quiz

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Questions and Answers

What primarily drives the movement of oxygen and carbon dioxide during external respiration?

Concentration gradients of the gases (correct)

Differences in blood flow

Cellular activity levels

Temperature fluctuations

How does a decrease in partial pressure of oxygen at high altitudes affect gas exchange?

It enhances oxygen diffusion into the bloodstream.

It has no effect on gas exchange.

It reduces the overall oxygen diffusion rate. (correct)

It increases the solubility of oxygen in blood.

What would likely occur if there is reduced alveolar ventilation?

Increased carbon dioxide levels in alveoli (correct)

Improved gas exchange efficiency

Increased pulmonary blood flow

Decreased bronchiole diameter

Which factor has the least impact on the diffusion of gases during external respiration?

<p>Temperature of the surrounding environment</p> Signup and view all the answers

What is the relationship between pulmonary blood flow and bronchiole diameter during changes in ventilation?

<p>Decreased blood flow causes bronchioles to constrict.</p> Signup and view all the answers

External Respiration Quiz

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Questions and Answers

What primarily drives the movement of oxygen and carbon dioxide during external respiration?

How does a decrease in partial pressure of oxygen at high altitudes affect gas exchange?

What would likely occur if there is reduced alveolar ventilation?

Which factor has the least impact on the diffusion of gases during external respiration?

What is the relationship between pulmonary blood flow and bronchiole diameter during changes in ventilation?

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