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Structure and Functions of Cell, Vesicles, Lysosomes, Peroxisomes
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Transcript
Sources:
*"Lysosomes, Peroxisomes, Secretory Vesicles." Cell Organelles:. N.p., n.d. Web. 26 Aug. 2012. <http://www.cellsalive.com/cells/lysosome.htm>.
www.cellsalive.com/cells/cell_model.htm
Vesicles, Lysosomes, and Peroxisomes are all located inside the cell membrane that makes it able to function properly.
Structure and Functions of Cell Membrane, Vesicles, Lysosomes, Peroxisomes
Peroxisomes are small, membrane-bound vesicles containing enzymes that break down fatty acids and amino acids.
Peroxisomes also contain an enzyme that breaks down hydrogen peroxide to water and oxygen.
Cells that are active in detoxification have many peroxisomes as well. Some examples are the liver and kidneys.
•The cell membrane, or plasma membrane, is the outermost component of a cell.
*The cell membrane encloses the cytoplasm and forms the boundary between material inside the cell and material outside it.
Lysosomes are membrane-bound vesicles formed from the Golgi apparatus.
They contain a variety of enzymes that function as intracellular digestive systems.
The enzymes within the lysosomes break down the ingested materials.
*Phospholipids and proteins are the major molecules that make up the cell membrane.
*The substances outside the cell are called extracellular substances and the substances inside the cell are called intracellular substances.
Vesicles are a small, membrane-bound sac that transports or stores materials within the cells.
Secretory Vesicles pinch off from the Golgi apparatus and move to the surface of the cell.
In many cells, secretory vesicles accumulate in the cytoplasm and are released to the exterior when the cell receives a signal.
Phospholipids form a double layer of molecules. The double layer of phospholipids forms a lipid barrier between the inside and outside of the cell.
The non-polar, fatty acid ends of the phospholipids are hydrophobic so the face away from the water on both sides of the membrane.
The polar, phosphate-containing ends of the phospholipids are hydrophilic so that means that water faces inside and outside of the cell.
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