P5, M2 and D2 - Understand how homeostatic mechanisms operate in the
maintenance of an internal environment
Give a definition for homeostasis and explain how this helps the body [P5]
Explain the term negative feedback:
For each picture, explain what the homeostatic response would be. Use
diagrams and key scientific terms:
Cold
Hot
Low
P5, M2 and D2 - Understand how homeostatic mechanisms operate in the
maintenance of an internal environment
High
When you are dehydrated…..
Your tasks to reach M2 and D2: (On a separate piece of paper)

M2 discuss the probable homeostatic responses to changes in the internal
environment during exercise
When you are exercising different changes occur in the body to try and deal with the
change in environment (stimulus) and the reaction that are occurring in the body
(respiration). Explain to an athlete the homeostatic mechanisms when someone
exercises.

D2 evaluate the importance of homeostasis in maintaining the healthy
functioning of the body.
Why are the changes that you have explained above important in order to keep the
body working? Explain and discuss what would happen without the homeostatic
responses.
Learners need the opportunity to appreciate the importance of homeostasis and
homeostatic mechanisms within the body. This could be linked to possible
scenarios of what happens when homeostasis does not function correctly.
Discussion of homeostasis and possible metabolic uses of the major products of
digestion can be linked to diet, growth, exercise and weight change.