The movement of molecules in a fluid or gas from a region of higher concentration to a region of lower concentration is called

answer: all : )

explanation:

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.

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.  

this might