25th November 2019


Why do the phospholipids in the cell membrane form a bilayer?

Being cylindrical, phospholipid molecules spontaneously form bilayers in aqueous environments. In this energetically most-favorable arrangement, the hydrophilic heads face the water at each surface of the bilayer, and the hydrophobic tails are shielded from the water in the interior.

Consequently, why would they make poor receptors?

To bind the receptor causes a response beyond the cell membrane and the enzyme facilitates a chemical change in the substrate. If proteins were rigid, they would make poor receptors because the proteins has to have a certain shape and molecule to bond to. Insulin helps cells take up sugar from the blood.

What happens when your insulin receptors stop working?

Insulin helps cells take up sugar from the blood. Explain the effect on blood sugar levels if insulin receptors stopped working. Saline solution is used because there would be more solutes in the cell if plain water was used, so water would go into the cell and cause the cell to rupture.

Why do phospholipids form a double layer in the cell membrane?

The tails bond to each other. (Phospholipids form a double layer because heads, water loving, are attracted to the water in the cytoplasm inside the cell and the watery fluids outside the cell.
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