Endocrine System [5]

Question 1

Glucose’s effect on beta cells

Answer 1

Glucose is metabolised to form ATP
ATP is used to close potassium channels
This makes the cell less negative
This triggers the opening of Ca2+ channels
Ca2+ binds to vesicles, causing them to merge with cell surface membrane

Question 2

Cortisol

Answer 2

Produced by adrenal cortex
- Raises blood pressure
- Raises blood glucose
- Dampens immune system

Question 3

Aldosterone

Answer 3

Produced by adrenal cortex
- Regulates blood pressure by controlling ion conc. of blood.
- Increases Na+ reabsorption to do so