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Summary: Unit 13 Physiology Of Fluid Balance

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Unit 13 Physiology of Fluid Balance

This assignment will cover the phospholipid bilayer, how it is structured and what its function is. It will also outline the facts about Hydrophobic and Hydrophilic tails. Additionally, it will look at different types of movement in and out the cell. It will also explain the affect cholesterol has on the lipid bilayer.
The phospholipid bilayer is two layers of phospholipids that make up the membrane. It confines the cell organelles from the extracellular area. The cell can manage its own environment. The phospholipid bilayer controls what enters and exits the cell, with the aid of transporter proteins and channels. However if the internal cell environment is not performing correctly then the channels will …show more content…
In the peripheral proteins there are glycoproteins, these are recognisable by the immune system, the cell will then alert the brain that the cell has been infected and lysosomes will be made to come and engulf the bacteria infecting the cell. Peripheral proteins are easily separable from the lipid bilayer. However, they are less mobile inside the lipid bilayer. If substances and materials could not move in and out of the cell then it will not get the energy it needs to function and it will not be able to excrete substances it no longer needs. This could damage the cell indefinitely. ATP energy is required to move the molecules through the membrane. Peripheral proteins are appendages loosely constrained to the surface if the …show more content…
Channel proteins are essential in the movement of charged ions, these are individual for the ions that they move. There are different types of facilitated transporters, for example: ubiquitous glucose transporters, different amino acid transporters, facilitative urea transports and others.
The image below shows how the molecules move across a membrane using transporter proteins to get to the inner cell mass. Osmosis is when water molecules move across membranes from an area of more dilute to an area of less dilute solution through a partially permeable membrane. The energy that drives this process is called osmotic pressure. Diffusion and osmosis are affected by the thickness of the membrane because it’s further travel. Osmosis is a natural equilibrium process.
This diagram shows the process of osmosis, it makes it clear how the water molecules move across a partially permeable membrane to create an

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