Internal Clock Biology Definition. An internal mechanism in organisms that controls the periodicity of various functions or activities such as metabolic changes sleep cycles or photosynthesis. Medical Definition of biological clock.
We all have an internal clock in our brain that tells us what biological time of day it is says Ken Wright a professor at the University of Colorado and director of a sleep lab. Glossary of biology terms. Once you arrived at work it was possible but not likely that youd use a time clock to verify the time of your arrival.
1 A persons innate sense of time.
Definition of internal clock 1. The body clock or circadian clock is an internal clock that keeps track of time. Once you arrived at work it was possible but not likely that youd use a time clock to verify the time of your arrival. The long trip upset my internal clock and I had a hard time getting to sleep.