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Breathing in Animals

Which of the ...

Question

Which of the following gases when decreased in the air increases the breathing rate?

A

Nitrogen

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B

Oxygen

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C

Carbon dioxide

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D

Inert gases

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Solution

The correct option is B
Oxygen

Breathing becomes faster if the oxygen content in the air decreases. As a general rule, the faster and deeper you breathe, the greater is the air exchange happening in your lungs. This means that there is an increase in the rate of oxygen uptake by blood and also of carbon dioxide wash-out.

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Similar questions

Q. Which of the following gases when decreased in the air causes breathing faster?

Q. Which of the following statements(s) is (are) true about respiration?
(a) During respiration, ribs move inward, the diaphragm is raised.
(b) In the alveoli, exchange of gases takes place, i.e., oxygen from alveolar air diffuses into blood and carbon dioxide from the blood into the alveolar air.
(c) Haemoglobin has a greater affinity for oxygen than carbon dioxide.
(d) Alveoli increases the surface area for the exchange of gases.

a) Write down the composition of air.

(b) Give the relative amounts of the gases oxygen, nitrogen, and carbon dioxide present in the air. Based on your answer, arrange these gases in increasing order of their abundance.

Q. Which of the following statement(s) is (are) true about respiration?
(i) During inhalation, ribs move inward and diaphragm is raised.
(ii) In the alveoli, exchange of gases takes place i.e., oxygen from alveolar air diffuses into blood and carbon dioxide from blood into alveolar air.
(iii) Haemoglobin has greater affinity for carbon dioxide than oxygen.
(iv) Alveoli increase surface area for exchange of gases.

Q. Name one use of the following gases: Nitrogen, Oxygen, Carbon dioxide.

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