EVERYDAY SCIENCE

Detailed explanation-1: -When you exercise and your muscles work harder, your body uses more oxygen and produces more carbon dioxide. To cope with this extra demand, your breathing has to increase from about 15 times a minute (12 litres of air) when you are resting, up to about 40–60 times a minute (100 litres of air) during exercise.

Detailed explanation-2: -Oxygen is obtained through breathing. During vigorous exercising, more ATP is required for cellular respiration. Hence the breathing rate increases during vigorous exercising.

Detailed explanation-3: -The heart pumps the oxygenated blood to the body. The more oxygen available, the more energy can be produced through glycolysis. When Page 4 exercising, the body needs more energy. Therefore, it needs more oxygen (increased breathing rate) delivered faster (increased heart rate).

Detailed explanation-4: -Breathing rate increases during exercising or running. It slows down when sleeping.

Detailed explanation-5: -A high or low respiratory rate may be a sign that an underlying issue is present. Common causes of a high respiratory rate include anxiety, fever, respiratory diseases, heart diseases, and dehydration. Common causes of a low respiratory rate include drug overdoses, obstructive sleep apnea, and head injuries.