Robin carries the trash from the house to the garbage can outside. Which statement best describes the science of what he did? 1.He caused the garbage to have potential energy when it moved.
2.He used energy to carry the garbage.
3.He did not have to work because garbage is light.
4.He would use less energy if he were to move the garbage faster

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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.