second messengers

Question 1

what is the second messenger?

Answer 1

cAMP

Question 2

what is protein kinase A?

Answer 2

an enzyme

Question 3

give two examples of what the hormone is likely to be:

Answer 3

adrenaline or glucagon

Question 4

key points for the second messenger model:

Answer 4

> hormone is complementary to a receptor protein on the cell surface membrane of the target cell
hormone binds to the receptor activating the enzyme adenyl cyclate
adenyl cyclate converts ATP –> cAMP
cAMP is the second messenger, activating an enzyme called protein kinase A by changing its tertiary structure
protein kinase A performs glycogenesis