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What is homeostasis?
the maintenance of a constant internal environment within restricted limits in organisms
What are some of the examples of physiological factors controlled by homeostasis in mammals?
body temperature
blood pH
blood glucose concentration
water potential of the blood
metabolic waste
Why is homeostasis important?
enzymes: fluctuation in pH and temperature can lead to enzymes denaturing/ ensure suitable rate
water potential: cells can shrink and expand
What are the components of a typical control system?
input (change to the system)
receptor (change detected)
coordinator
effector (brings about changes)
output (systen returns to optimum point)
What is negative feedback?
a change that results run a substance being restored back to its normal level
What is positive feedback?
a process which results in a substance that departs from its normal level, becoming further from its norm
