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Exchange of Gases

Inorder to ho...

Question

Inorder to hold their breath for a long time, free divers hyperventilate to decrease $C O_{2}$ level in blood.

A

True

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B

False

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Q. If you hold your breath for some time and then release it, you have to breathe heavily after that. Why?

Q. Evaluate the correctness of the following statement :
IF A PERSON BREATHES IN AND OUT RAPIDLY FOR SOME TIME ( HYPERVENTILATION ), HIS BODY ALLOWS HIM TO HOLD HIS BREATH FOR A LONGER PERIOD THAN IN THE CASE OF NORMAL VENTILATION ( FOR EXAMPLE WHEN HE IS SUBMERGED IN WATER ) .
Is that due to
(i) Increase in O₂levels in his body
(ii) Decrease level of CO₂in his body at that time ?

Q. If someone wants to hold his own breath, they can’t hold for a very long time because:

Q. Try to hold your breath as long as you can. You might have observed great discomfort in the body. This is due to increase in

{C O}_{2}

levels in the lungs and the respiratory part of the brain forces you to breathe and sends painful contractions of the diaphragm and muscles in the ribs. Where does this

{C O}_{2}

come from in the first place?

How long can healthy adults hold their breath?

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