Monday, October 18, 2010

Reflections

What I learned:
I learned about membranes and there many functions. I had no idea about how many functions membrane proteins had. I also never realized how complex each of the functions were. I learned in depth about transport in the membrane.I learned how many little things go on so that transferring substances in the membrane is possible.I also learned how membranes control how everything moves in the molecule. I learned about diffusion,passive transport , osmosis and active transport.

What I had a difficult time with:
I had a little bit of difficulty when looking a phospholipids because there was a phospholipid bilayer. I was confused on what the phospholipid bilayer was because it seemed to have some many elements in it.

How is a structure related to a function:
The structure helps make the functions possible. For example, the the structure of phospholipids enable the formation of membranes. The proteins in the membrane have specific functions. Each element is connected top each other making the functions possible.

4 comments:

  1. The plasma membrane is made up of mostly phospholipids which also allow them to be so fluid. There are two parts to a phospholipid: the tail and the head. The inside and outside of a cell is mostly water so the "head" which faces the interior and the exterior of the cell is hydrophilic. The "tail" is hydrophobic which is why they are away from the watery parts of the cell.

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  2. The plasma membrane of a cell is composed of phospholipids and proteins. The structure of these phospholipids also allows them to form membranes between two watery enviroments. The phosopholipids form a two layer boundry that surronds and protects the cell. The phosphate ends face the watery parts of the cell, with the hydrophobic fatty acid tails tucked inside the membrane, which protects them from the water.

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  3. The phospholipid bilayer is composed of two rows of phospholipid molecules that make up the plasma membrane on the outside of the cell. The membrane regulates the transport of substances across the membrane only allowing certain substance to pass. The structure of the molecule is that it has a hydrophilic head meaning it likes water and a hydrophobic tail meaning it doesn't like water. The tails all face inward away from the water.

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  4. the phospholipids make up the plasma membrane. the phospholipids have a head (hydrophilic)and a tail(hydrophobic) the head faces the outside and formes the membrane on the outside of the cell. The tails are on the the inside becasue the are hydrophobc. The phospholipids make up 2 layers to form a boundry arend the cell.

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