Biology U3

Heart Rate.

During exercise, the heart rate increases. This increase is necessary for many reasons, most importantly to increase blood flow. More oxygen is needed to be supplied to the muscles and other parts of the body, to ensure aerobic respiration occurs and to prevent oxygen debt. The heart rate increases to supply more glucose, food/ sugar to muscles and other parts of the body. It is necessary for the heart rate to increase so that the rate of respiration can increase, as more energy is needed to be released and more carbon dioxide is needed to be removed from the body. The heart rate needs to be increased as the muscles are doing more work and contracting more. It is also necessary for the heat rate…