Question

how does angiotensin help increase blood pressure?
a by causing sodium retention
b by constricting blood vessels
c by ridding the body of water
d a and b
e all of the above

Explanation:

Angiotensin II causes sodium retention (stimulates aldosterone release which promotes sodium reabsorption in kidneys) and constricts blood vessels (direct vasoconstrictor effect). Ridding the body of water (option c) would lower blood pressure, not increase it. Since a (sodium retention) and b (blood vessel constriction) are correct mechanisms by which angiotensin helps increase blood pressure.

Answer:

d. A and B