Answer:
Vasopressin causes vasoconstriction and increases reabsorption of water by the kidneys. V1A receptors regulate blood pressure and V2 receptors have an effect on renal function.
The Medulla Oblongota is what determines your breathing rate :)
Medulla Oblongata is your answer :)
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Most important and abundant one are the phospholipids - amphiphatic molecules with an hydrophilic head and a hydrophobic hydrocarbon tails. They compose the membrane bilayer. Also important are the membrane proteins, which can be periheric and internal and can serve as channels, receptors, pumps etc.
Depending on the cell type the membrane can also contain cholesterol (in animal cells, enhances the membrane stability) or hopanes(in prokaryotes, same function as cholesterol) or ether-phospholipids with branched hydroharbon tails(in archaea, make the membranes more stable and resistant to severe conditions, as archaeas are extremophiles)