Glycogen belongs in the class of molecules known as

what subject is this

i'll try what topic lol

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.  

cuz some people don't have enough food. that's why we need more ppl to donate food to the hungry.