Bio Frq #4

Topics: Cell membrane, Cell, Golgi apparatus Pages: 1 (336 words) Published: January 10, 2013
FRQ #4
The endomembrane system is made up of different membranes that are suspended in the cytoplasm within a cell. These membranes divide the cell into functional and structural compartments, or organelles. The endomembrane system has three major components; the plasma membrane, Golgi apparatus, and vesicles. The plasma membrane surrounds the outside of the cell. It is made up of a double layer of phospholipids and controls the movement of various substances into and out of the cell, both passively and actively. The plasma membrane separates the inside of the cell from the outside; it is consisted of a phospholipid bilayer. This bilayer is a double membrane made up of hydrophobic tails and a hydrophilic heads. The function of the Golgi apparatus is to modify, sort, and package proteins, lipids and other materials from the Cellular endoplasmic reticulum for storage within the Cell and for exporting to the exterior of the Cell. The vesicles are small compartments that are involved in the exporting and importing of material in, out, and within the cell. The structure of the plasma membrane is the phospholipid bilayer, which forms a stable barrier that allows traffic flow. The phospholipid bilayer carries out the functions of the plasma membrane, such as selective transport of molecule. The structure of the Golgi apparatus is comprised of stacks of flattened cisternal membranes that in vertebrates are connected to form a ribbon. The stacked structure allows it to perform its functions. The vesicles are small membranous sacs. They form naturally in the membrane around proteins that enter through. In my opinion is an individual was involved with a disorder that produced a protein correctly but could not export it from the cell could have one of two problems. There could be an issue with the Golgi apparatus not packaging the proteins correctly; therefore they will not be able to be exported. Or their plasma membrane may not be operating normally and isn’t allowing...
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