Dopamine and Norepinephrine

Question 1

Dopamine

Answer 1

Dopamine in the kidney inhibits Na/K ATPase activity and therefore inhibits Na reabsorption and causes natriuses (excretion of salt in the urine).

Question 2

L Dopa

Answer 2

This is a precursor to dopamine, epinephrine and norepinephrine, collectively known as catecholamines.

Question 3

Norepinephrine

Answer 3

Norepinephrine stimulates Na/K ATPase activity in rat brain. It is a stress hormone as well as a neurotransmitter.