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Plasma Membrane - Assignment

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Added on  2021-04-19

Plasma Membrane - Assignment

   Added on 2021-04-19

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Running head: Nursing AssignmentPlasma Membrane and Cellular Transportation of Oxygen and Na+ ionName of the StudentName of the UniversityAuthor Note
Plasma Membrane - Assignment_1
1Nursing AssignmentAnatomy of the Plasma MembraneThe plasma membrane or cell membrane contains both lipids and proteins.Structurally, the membrane is a phospholipid bilayer, which acts as a stable barrier betweentwo aqueous compartments, the inner and the outer surfaces of the cells. The proteins areembedded in the bilayer. These embedded proteins have different functions like selectivetransportation of molecules in or out of the cell and cell to cell recognition. Within thisbilayer, the water loving heads of the fatty acids are oriented towards the outer surfaces,while the non-fearing tail is oriented towards the inner surface (between the two layers). Dueto such an orientation of the polar heads, the bilayer can seal itself on its own, while theorientation of the non polar tails makes the membrane impermeable to water solublemolecules (Peat & Nair, 2016). This is also called the fluid mosaic model of the cellmembrane, where the membrane acts as a mosaic of proteins embedded in the 2 layers(Marieb & Hoehn, 2016).How Oxygen moves into the cell: Respiratory gases like oxygen and carbon dioxide, as well as fat soluble vitamins canmove across the phospholipid bilayer of the plasma membrane by simple diffusion. Theenergy for the movement of the molecules across the membrane is provided by the kineticenergy of the molecules. The higher concentration of oxygen in the blood and extracellularfluid, than inside the cell, facilitates the movement of the oxygen molecules into the cell(Marieb & Hoehn, 2016). This type of movement across the cell membrane is rapid as theypass right though the pores on the membrane (Peat & Nair, 2016).How Sodium ions move in and out of the cell:
Plasma Membrane - Assignment_2

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