Homeostasis

Question 1

What is homeostasis?

Answer 1

-the maintenance of a constant internal environment
-Mechanisms are in place to keep optimum conditions despite internal and external changes. This is needed for enzyme action and cell functions

Question 2

what is an automatic control system?

Answer 2

-a system that regulates your internal environment which include both nervous and hormonal communication systems
-e.g. there are control systems that maintain your body temperature and blood glucose

Question 3

What is the purpouse of negative feedback?

Answer 3

-your automatic systems use it as a mechanism to keep your internal environment stable
-when the level of something gets too high or low (e.g. water or glucose) the body using negative feedback to brig it back to normal

Question 4

How does the negative feedback system work?

Answer 4

1)the receptor detects a stimulus-level is too high or low
2)the coordination centre(e.g.the brain) receives and interprets the information, then organises a response
3)the effector produces a response which counteracts the change and restores the optimum level- the level decreases or increases