Homeostasis

Question 1

What is homeostasis

Answer 1

the regulation of the conditions inside your body (and cells) to maintain a stable environment, in response to changes in both internal and external conditions.

Question 2

what are automatic control systems

Answer 2

a system that regulates the body’s internal conditions to maintain homeostasis

Question 3

what are some of the automatic control systems

Answer 3

nervous and hormonal communications systems.

Question 4

what are the automatic control systems made up of

Answer 4

cells called receptors, coordination centres (including the brain, spinal cord and pancreas) and effectors.

Question 5

what is negative feedback

Answer 5

when the level of something (e.g. water or glucose) gets too high or too low your body uses negative feedback to bring it back to normal

Question 6

what are stages of negative feedback when the level of something is too high

Answer 6

1) receptors detects a stimulus - level is too high
2) the coordination centre receives and processes the information, then organises a response
3) effectors produce a response, which counteracts the change and restores the optimum level - the level decreases

Question 7

what are the stages of negative feedback when the level of something is too low

Answer 7

1) receptor detects a stimulus - level is too low
2) the coordination centre receives and processes the information, then organises a response
3) effector produces a response, which counteracts the change and restores the optimum level - the level increases

Question 8

why do the internal conditions of your body need to be regulated

Answer 8

to maintain the right conditions for cells to function properly and for enzyme action