2007-03-19 14:51:50 · 2 answers · asked by vlonghair98 1 in Science & Mathematics ➔ Biology
in general, HR increases with increased metabolic demand. the heart needs to deliver more oxygen when there is higher demand, and increasing heart rate is one way to do that.
2007-03-19 14:59:32 · answer #1 · answered by belfus 6 · 0⤊ 0⤋
Basal metabolic rate (BMR) is the amount of energy expended while at rest in a neutrally temperate environment, in the post-absorptive state (meaning that the digestive system is inactive, which requires about twelve hours of fasting in humans). The release of energy in this state is sufficient only for the functioning of the vital organs, such as the heart, lungs, brain and the rest of the nervous system, liver, kidneys, sex organs, muscles and skin. Increased cardiovascular exercise and muscle mass can increase BMR
Heart rate is a term used to describe the frequency of the cardiac cycle. Usually it is calculated as the number of contractions (heart beats) of the heart in one minute and expressed as "beats per minute" (bpm).
2007-03-19 22:03:35 · answer #2 · answered by ANITHA 3 · 0⤊ 0⤋