Which of the following is not part of cell theory? А Cells are the basic unit of life in all organisms.

B All living things come from one or more cells.

C All cells must be able to make their own food.

D All cells come from existing cells.​

c. cells must be able to make their own food

C. All cells must be able to make their own food.

Explanation:

The other three are the cell theory. :)

But, C is NOT, so it's the answer. Most cells don't make their own food, so it isn't something that is considered part of the theory.

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.