Lysis is best described as: A. The balance of concentration inside and outside of the cell.
B. When a cell takes in too much water from Osmosis, swells, and bursts.
C. When a cell loses too much water from Osmosis, and shrinks.
D. The production of energy in the cell.

I guess B because the term is used to talk about the time cell bursts to release DNA, RNA or other things.

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.