Homeostass

Question 1

Define homeostasis

Answer 1

Maintenance of an internal environment

Question 2

What are internal factors controlled by homeostasis

Answer 2

• core temp
• blood ph
• blood glucose conc
• wp of blood

Question 3

Why is it important blood ph and stable core temp maintenaned

Answer 3

• ensure enzymes are most effect
• rate of reaction may be reduce and enzymes will be denatured

Question 4

Why is it important the boy maintains stable blood glucose concentration

Answer 4

• maintenance of constant wp in blood and body fluid
• glucose needed for respiration by cells and metabolic reactions

Question 5

Describe how homeostasis is controlled by negative feedback

Answer 5

Optimum point - point at which a system works
Stimuli - causes deviation
Receptor - detects deviation from the optimum
Coordinator - coordinates info from receptors send instructions to effector
Effectors - brings about changes needed to return the system to optimum