1 - 5 degrees every 10 minutes
1 degree every 5 - 10 minutes
5 - 10 degrees every minute
Maintenance of a fluctuating internal environment
Maintenance of a stable internal environment at cell's optimum conditions.
Controlled changes in internal environment based on reactions taking place
Concentration of glucose
Everything that is regulated has a
or set point that
mechanisms aim to maintain.
are used to detect slight deviations from this value.
Receptor are connected to control centres that switch
e.g. muscles and glands, on or off.
The value constantly
in a narrow range around the set point.
Deviation from norm resulting in further changes in same direction away from norm
Deviation from norm results in a change in the opposite direction, back to the norm.
Value stays at the set point constantly
Enzyme-controlled reactions occur at optimum rate
It is the most comfortable temperature
Enzyme-controlled reactions occur at slowest rate, as enzymes denature
Enzymes would denature and reactions would seize
Reactions would occur too quickly for body to stay alive
Reactions would occur too slowly for body to remain alive
Enzymes would denature and reactions would stop occurring
Reactions would occur too quickly for body to remain alive
To switch effectors on and off
To keep body temperature at a constant
To detect changes in temperature
Route of blood flow
Controlled muscle contractions
选择要在Apple App Store上查看的Topgrade应用程序。