Which correctly describes a difference between the male and female
reproductive systems?

A. Females are fertile every day.
B. Females produce gametes more often.
C. Males produce more gametes.
D. Males have a monthly cycle.

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.