What environmental conditions induce oxygen to bind to hemoglobin? An environment high in carbon dioxide
An environment high in oxygen
An environment under high pressure
An environment under low pressure

it is a learned trait

explanation:

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.