Homeostasis

Question 1

What is homeostasis?

Answer 1

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

Question 2

In homeostasis what conditions need to remain optimum?

Answer 2

Water levels
Body temperature
Blood glucose concentration

Question 3

How are the optimum conditions controlled in homeostasis?

Answer 3

Automatic control centres in the body

These may involve a nervous response or a chemical (ie hormonal) response

Question 4

How do the control centres work in homeostasis?

Answer 4

1. Cells called receptors detect changes called stimuli
2. Receptors send signals to a coordination centre (brain, spinal cord, pancreas)
3. A response brought about by a muscle or a gland (effectors)
4. Optimum conditions are restored