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
Aerobic respiration is the process during which food is broken down in the presence of oxygen to release energy. During heavy exercise a person needs more energy and so more oxygen is taken for respiration to take place. Hence the breathing rate of the person increases.

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

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.

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

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)

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

The correct option is B FalseAerobic respiration is the process during which food is broken down in the presence of oxygen to release energy. During heavy exercise a person needs more energy and so more oxygen is taken for respiration to take place. Hence the breathing rate of the person increases.