B5: 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

What body conditions need regulating?

Answer 2

1) Body glucose content.

2) Water content of the body.

3) Body temperature.

Question 3

Why do we have multiple automatic control systems in our body?

Answer 3

For homeostasis of different things.

Question 4

What two things could be included in our automatic control systems?

Answer 4

1) The nervous system.

2) Hormones.

Question 5

What is the order in an automatic control system?

Answer 5

1) Stimulus: Change in the environment

2) Receptor: Detects change.

3) Co-ordination centre: Receives and processes information from receptor cells.

4) Effector: This is either a gland or muscle, it carries out a response restoring the optimum levels.

5) Response: Either muscle contraction or gland secretion.

Question 6

What 3 components do all automatic control system have?

Answer 6

1) Receptors

2) Co-ordination centre

3) Effectors