Homeostasis

Question 1

What is homeostasis?

Answer 1

any process that living things use to actively maintain fairly stable conditions necessary for survival

Question 2

What are the conditions that need controlling?

Give examples of the conditions

Answer 2

internal conditions - water, temperature, glucose (blood sugars) Ion content
waste products - CO2, Urea (in urine)

Question 3

Why do we need homeostasis?

Answer 3

Cells need the right conditions to function properly, including the right conditions for enzyme action

Question 4

What are the automatic control systems made from? (name the 3 things)

Answer 4

Receptors
coordination centres - brain, spinal cord and pancreas
effectors

Question 5

What is negative feedback?

Answer 5

When the level of something gets to high or too low it uses negative feedback to bring it back to normal.

Question 6

How does negative feedback work?

Answer 6

RECEPTOR detects a stimulus level is too high of too low
the COORDINATION CENTER receive and processes the information and the organises a response
EFFECTOR produces a response which counteracts the change and restores the optimum level - the level increases or decreases
the effectors will just carry on producing the responses for as long as there stimulated by the coordination centre. if level becomes too different the negative feedback starts again.

Question 7

Why do the internal conditions of your body need to be regulated?

Answer 7

For your cells to be able to function properly

Question 8

Name the component of a control system that detects stimuli?

Answer 8

Receptor