A patient has insufficient blood supply to the kidneys, which has caused the development of pressor effect due to constriction of arterial resistance vessels. This condition results from the vessels being strongly affected by the following substance:

Answer options

1. Renin
2. Angiotensin II
3. Angiotensinogen
4. Norepinephrine
5. Catecholamines

Explanation

A patient has insufficient blood supply to the kidneys, which has caused the development of pressor effect due to the constriction of arterial resistance vessels. This is the result of the vessels being greately affected by the following substance:The only strong direct vasoconstrictor is angiotensin II. Renin activates the renin-angiotensin system. Angiotensinogen is not active in vessels. Catecholamines have nothing to do with the kidneys.