15.1 The principles of homeostasis

Question 1

why is a stable internal environment so important?

Answer 1

enzymes and

Question 2

what is homeostasis?

Answer 2

maintaining of a constant internal environment with small fluctuations in a dynamic equilibrium over a narrow range of conditions

Question 3

what is the role of a receptor in homeostasis?

Answer 3

they detect changes to the internal and external environment which is important in monitoring changes to signal the need of a change

Question 4

what is the role of a effector in homeostasis?

Answer 4

to bring about a change to restore EQ in the internal environment

Question 5

what is negative feedback?

Answer 5

the reversal of a change to restore conditions to a normal level by reversing the initial stimulus

Question 6

example of negative feedback

Answer 6

glucoregulation

Question 7

what is positive feedback?

Answer 7

reinforcement of a change to increase a response

Question 8

is positive feedback homeostasis?

Answer 8

nope
it does not keep the internal environment constant

Question 9

example of positive feedback

Answer 9

blood clotting

when a blood clot forms, platelets release chemicals to trigger more clotting