What is the function of the radula in gastropods? O It is used like a nose to sense nearby food.
O It is used like a tongue to test the taste of food.
O It is used like teeth to scrape and tear food.

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.