What is parasympathetic nervous system

It regulates the body’s rest and digest mechanism. Once stress is reduced the system helps the body return to its normal state and conserve energy by slowing the heart rate, and reducing blood flow to the muscles.

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all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.