Respiratory System Review 5) While hyperventilating, what happens to the PCO2 of

Question

Respiratory System Review

5) While hyperventilating, what happens to the PCO2 of the blood? (increase, decrease, no change) 6) During rebreathing (i.e. breathing into a sack): a. what happens to the PCO2 of blood? (increase, decrease, no change) b. what happens to the total flow of air into the lungs (i.e. minute ventilation)? (increase, decrease, no change) 7) During breath holding, what happens to the PCO2 of the blood? (increase, decrease, no change) 8) Let's say metabolic rate is elevated, causing an increase in the partial pressure of carbon dioxide in the arterial blood. How could the respiratory system change ventilation to compensate for this? (increase, decrease, no change)

Explanation / Answer

5.Decreases.

Hyperventilation causes excessive amount of CO2 to be removed from body reaulting in decreased PCO2 in blood.

6.a.Increases.

During rebreathing pH of blood decreases there by it retains more amount of PCO2.

b.Increases.

The total lung capacity will be maximum during rebreathing.

7.Increases.

During breath holding PO2 is decreased and PCO2 is increased.

8.Decreases.

Hyperventilation causes decreased PCO2 and increase in PCO2 causes peripheral constriction there by blood pressure decreased.

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