During heavy exercise, the breathing rate of a person slows down.

True

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False

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Solution

The correct option is B False
Breathing rate
When we exercise, our bodies utilise more oxygen and create more carbon dioxide as our muscles work harder.
To meet this increased demand, our breathing rate must increase from around 15 times per minute (12 litres of air) at rest to roughly 40-60 times per minute (100 litres of air) during exercise.
If the exercise is strenuous, breathing rates may increase from a normal resting rate of 15 breaths per minute.
As a result, during strenuous exercise, the breathing rate might increase by up to 25 times.
Final answer: The given statement is false.

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Similar questions

Question 7 (i)
Mark ‘T’ if the statement is true and ‘F’ if it is false:
(i) During heavy exercise, the breathing rate of a person slows down.

Mark ‘T’ if the statement is true and ‘F’ if it is false:

(i) During heavy exercise the breathing rate of a person slows down. (T/F)

(ii) Plants carry out photosynthesis only during the day and respiration only at night. (T/F)

(iii) Frogs breathe through their skins as well as their lungs. (T/F)

(iv) The fishes have lungs for respiration. (T/F)

(v) The size of the chest cavity increases during inhalation. (T/F)

Tick the correct answer:

(a) In cockroaches, air enters the body through

(i) lungs

(iii) spiracles

(iv) skin

(b) During heavy exercise, we get cramps in the legs due to the accumulation of

(i) carbon dioxide

lactic acid

alcohol

(iv) water

(i) 9-12

(ii) 15-18

(iii) 21-24

(iv) 30-33

(d) During exhalation, the ribs

(i) move outwards

(ii) move downwards

(iii) move upwards

(iv) do not move at all

Q. During heavy exercise, the breathing rate can increase upto ........... per minute.

State whether the following statements are true or false. Justify your statement. [5 MARKS]
(1) During heavy exercise, the breathing rate of a person slows down.
(2) Plants carry out photosynthesis only during the day and respiration only at night.
(3) Frogs breathe through their skin as well as their lungs.
(4) At high altitudes, the lower air pressure makes it more difficult for oxygen to enter our respiratory systems.
(5) Glucose breaks down into lactic acid in the absence of oxygen.

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