Homeostasis and Negative feedback

What is homeostasis?

Keeping internal environment constant

What must remain constant?

• Glucose levels

• Body temperature

• Water content

What must be removed?

Waste Chemicals

What are hormones?

• Chemical messengers controlled by bodily functions

• Proteins produced by glands and carried by blood

Negative Feedback - 1

Normal glucose levels

Negative Feedback - 2

Carbohydrate meal is eaten

Negative Feedback - 3

Glucose level in blood goes up

Negative Feedback - 4

Pancreas starts releasing insulin in blood

Negative Feedback - 5

Liver turns glucose into insoluble glycogen and stores it

Negative Feedback - 6

Glucose in blood decreases back to normal

Negative Feedback - 7

Pancreas stops releasing insulin