Homeostasis

Question 1

What does homeostasis describe

Answer 1

All processes that happen in a cell or organism to maintain optimal conditions

Question 2

Why do we need homeostasis

Answer 2

We live in a changing environment therefore we need to regulate our bodys internal conditions to make sure our enzymes and cells function well

If conditions are not optimal then our enzymes can denatured ( change shape), reducing there ability to speed up metabolic reactions

Question 3

Internal conditions humans need to regulate

Answer 3

Urea concentration ( in urine)

Internal body temp

Water levels

Blood sugar levels

Carbon dioxide levels

Question 4

What are control systems made up of

Answer 4

Receptors - detect changes in environment

Coordination centres - receive and process info arriving from receptors

Effectors ( muscles or glands) - carry out responses to the stimuli to help restore optimum levels

Question 5

What is negative feedback

Answer 5

A process where a change in a systems output triggers a response that reduces or reverses that change bringing the system back to optimum level

Question 6

What is positive feedback

Answer 6

Opposite of negative feedback and makes small changes Bigger