Basic organism energy flow {basal metabolism rate}| sustains life. People have energy-use rate while completely resting, typically 1600 calories per day. Human rate averages 1000 calories per kilogram per hour. Rate is proportional to body surface and body weight. Whole-body average energy flow is 20% to 50% higher than basal metabolism rate.
gender
Rate is higher in males. Rate increases in pregnancy and lactation, up to three times more.
hormones
Thyroid and growth hormones affect basal metabolism rate.
factors
Rate increases in fever. Rate lowers during fasting.
isothermal
Metabolism typically is in isothermal environments, like sea or warm-blooded animals.
warm-bloodedness
Warm-blooded animals use up to ten times more energy than cold-blooded animals. Warm-blooded animals can live in wider temperature ranges and move faster. Temperature constancy requires muscle movement to heat tissues. Temperature constancy requires mechanisms to cool tissues. Brain controls temperature. Parents must keep eggs and babies warm. Temperature control turns off during sleep. Warm-bloodedness can be at different temperatures in different conditions. Food quantity must be more. Senses must find food. Memory must remember food locations. Planning must improved for better food strategies. Chewing must be more efficient. Breathing passage alters to allow breathing while eating.
Physical Sciences>Chemistry>Biochemistry>Chemical Cycle>Energy
5-Chemistry-Biochemistry-Chemical Cycle-Energy
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Date Modified: 2022.0224