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.
A.

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.
  • Why do phospholipids form a bilayer when placed in water?

    When phospholipids are mixed with water, they spontaneously rearrange themselves to form the lowest free-energy configuration. This means that the hydrophobic regions find ways to remove themselves from water, while the hydrophilic regions interact with water. The resulting structure is called a lipid bilayer.
  • How the phospholipids are arranged in the cell membrane?

    The phospholipids in the plasma membrane are arranged in two layers, called a phospholipid bilayer. As shown in Figure below, each phospholipid molecule has a head and two tails. The head “loves” water (hydrophilic) and the tails “hate” water (hydrophobic).
  • What is meant by the term phospholipid bilayer?

    phospholipid bilayer. Word Origin. a two-layered arrangement of phosphate and lipid molecules that form a cell membrane, the hydrophobic lipid ends facing inward and the hydrophilic phosphate ends facing outward.
B.

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 is the role of the cell membrane?

    It consists of a lipid bilayer with embedded proteins. The basic function of the cell membrane is to protect the cell from its surroundings. The cell membrane controls the movement of substances in and out of cells and organelles. In this way, it is selectively permeable to ions and organic molecules.
  • What part of the phospholipid is polar?

    There are two important regions of a lipid that provide the structure of the lipid bilayer. Each lipid molecule contains a hydrophilic region, also called a polar head region, and a hydrophobic, or nonpolar tail region.
  • Are phospholipids hydrophilic or hydrophobic?

    Phospholipids are amphipathic molecules. This means that they have a hydrophilic, polar phosphate head and two hydrophobic fatty acid tails. These components of the phospholipids cause them to orientate themselves, so the phosphate head can interact with water and the fatty acid tails can't, hence forming a bilayer.
C.

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.
  • What is the role of the cell membrane?

    It consists of a lipid bilayer with embedded proteins. The basic function of the cell membrane is to protect the cell from its surroundings. The cell membrane controls the movement of substances in and out of cells and organelles. In this way, it is selectively permeable to ions and organic molecules.
  • How do endocytosis and exocytosis differ from diffusion?

    Diffusion is passive, uncontrolled by the cell for nonpolar molecules. It occurs passively without any control from the cell itself. Endo/Exocytosis is the absorption or secretion of polar molecules through the cell membrane. It is an energy consuming process where the cell has complete control over it.
  • What part of the cell membrane plays an important role in active transport?

    Those proteins do much of the work in active transport. They are positioned to cross the membrane so one part is on the inside of the cell and one part is on the outside. Only when they cross the bilayer are they able to move molecules and ions in and out of the cell. The membrane proteins are very specific.

Updated: 25th November 2019

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