Is calcium made up of cells?

Well honestly almost every living things contains cells but in this case yes calcium is made up of cells.

Explanation:

Calcium ions are either pumped out of the cell by a specific plasma membrane, Ca2+-ATPase (PMCA), or back into the sarcoplasmic reticulum by SERCA. The PMCA are encoded by at least four genes, PMCA1 and 4 are the most widely expressed and are the two isoforms expressed in vascular smooth muscle cells.

yes

no

blue is scattered more than other colors because it travels as shorter, smaller waves. this is why we see a blue sky most of the time.