5.1 Homeostasis

Question 1

Define homeostasis

Answer 1

the regulation of the internal conditions of a cell or organism to maintain optimum conditions for function in response to internal and external changes.

Question 2

Homeostasis maintains optimal conditions for …………. action and all ……… ………………

In the human body, these include control of:
1.
2.
3.

Answer 2

enzyme
cell function

1. blood glucose concentration
2. body temperature
3. water levels

Question 3

These automatic control systems may involve …………. responses or …………. responses.

Answer 3

nervous
chemical

Question 4

All control systems include:
(3 things)

Answer 4

• cells called receptors, which detect stimuli (changes in the environment)
• coordination centres (such as the brain, spinal cord and pancreas) that receive and process information from receptors
• effectors, muscles or glands, which bring about responses which restore optimum levels.