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20 June, 13:21

Answer the below question choosing either a, b, c, d

Which of the following shows the changes that occur in the cardiovascular system during physical activity?

a) Increased heart rate, increased blood pressure, increased respiration rate

b) Increased heart rate, decreased blood pressure, increased respiration rate

c) Decreased heart rate, increased blood pressure, increased respiration rate

d) Decreased heart rate, decreased blood pressure, decreased respiration rate

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Answers (1)
  1. 20 June, 13:39
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    a) Increased heart rate, increased blood pressure, increased respiration rate.

    Explanation:

    When a person do any physical activity like running, jogging, cycling, swimming and stair climbing, the heart rate, blood pressure and respiration rate of a person are increased because due to physical activity, the body needs more and quick oxygen and energy. This oxygen is provided by heart through pumping of blood and energy is released due to the breakdown of glucose molecules that occurs in mitochondria of the cell in the process of respiration. For providing oxygen and energy quickly, blood pressure of the body is increased.
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