Homeostasis

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6 Terms

1

What is homeostasis?

the maintenance of a constant internal environment within restricted limits in organisms

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2

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

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3

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

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4

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)

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5

What is negative feedback?

a change that results run a substance being restored back to its normal level

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6

What is positive feedback?

a process which results in a substance that departs from its normal level, becoming further from its norm

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