Most solids

1 answer:

6 0

Most solids a) are dense and difficult to compress.

Most solids are closely compacted, their molecules are close together and vibrate. They don't move freely like gas or water molecules do.
They are difficult to be squeezed or flattened.

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Explanation:

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At first, we must consider that $O_2$ and $CO_2$ , $NO$ passively diffuses through membranes. As it is produced by an enzyme and accumulates in the endothelial cell cytosol, $NO$ passively diffuses down its concentration gradient through the endothelial cell plasma membrane out of the cell and then passiveley diffuses through the plasma membrane into the cytoplasm of the smooth muscle cell, where it acts to decrease contraction.