What do you call the end of a straw wrapper that a waiter leaves on your straw when serving your drink?

The waiter tears the raised part of the straw wrapper a few inches from either end and he pulls until a piece of the wrapper is entirely removed. The exposed part of the straw is what is then placed in the drink, leaving the remaining wrapper for the customer to remove himself. This will assure the customer that the waiter has not touched the straw with bare hands. The part of the straw that has remained is called a straw lace, or a drinking straw sleeve or a strawphylactic.

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.