Homeostasis

Question 1

DEFINE homeostasis

Answer 1

Maintaining a stable internal environment. e.g. body temp at 37’C, water levels, blood levels

Question 2

Why is homeostasis important

Answer 2

Your cells need the right conditions in order to function properly

Question 3

What 3 main components help maintain a steady condition

Answer 3

• receptors
• Coordination centres (brain, spinal cord and pancreas)
• Effectors

Question 4

What does negative feedback do

Answer 4

Counteracts change

Question 5

How does negative feedback work

Answer 5

When the level of something (e.g. temp or water) gets too high or too low, your body uses negative feedback to bring it back to normal

Question 6

Describe how negative feedback works

Answer 6

• Receptors detects a stimulus that something is too high or too low
• The coordination centre receives and processes the information and then organises a response
• Effector produces a response which counteracts the change and restores the optimum level (increasing or decreasing
• Effector will continue to do this as long as they are stimulated by the coordination centre, they stop when they make the levels change too much and the receptors pick this up, restarting the whole process