3. Instead of reducing the body's supply of angiot...
3. Instead of reducing the body's supply of angiotensin II, Angiotensin II receptor blockers(ARBs) block receptors for angiotensin -- a substance that makes blood vessels contract and narrow, as if placing a shield over a lock. This blockade prevents the chemical's artery-tightening effects, and lowers your blood pressure. ARBs can take several weeks to become fully effective. Possible side effects include dizziness, muscle cramps, insomnia, and high levels of potassium. Women should not become pregnant while taking this medication. What does the “chemical” refer to?
A、A. Angiotensin
B、B. ARBs
C、C. Receptors for angiotensin
D、无