NEET BIOLOGY

Detailed explanation-1: -As your level of activity increases, your breathing rate increases to bring more air (oxygen) into your lungs so that your lungs can pump more oxygen into your blood and out to your muscles.

Detailed explanation-2: -For more energy, the person needs more supply of oxygen because energy is released by the process of cellular respiration. For this more oxygen supply to the lungs, the person starts breathing rapidly.

Detailed explanation-3: -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.

Detailed explanation-4: -Answer: The breathing rate during exercise is increased while during sleep it goes down.

Detailed explanation-5: -These movements in our body can be felt On an average, an adult human being at rest breathes in and out 15–18 times in a minute. During heavy exercise, the breathing rate can increase upto 25 times per minute. While we exercise, not only do we breathe fast, we also take deep breaths and thus inhale more oxygen.