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32 Cards in this Set
- Front
- Back
What are the three main parts of a cell?
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plasma membrane
cytoplasm nucleus |
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what does the plasma membrane do
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regulates the flow of material into and out of a cell
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cytoplasm
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consists of all the cellular contents between the plasma membrane and nucleus
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cytosol
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fluid portion of cytoplasm
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organelles
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each has a characterisitc structure and specifid functions
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chemical composition of the plasma membrane
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consists mostly of phospholipids
virtually all membrane proteins are glycoproteins cholesterol and glycolipids are found in lesser amounts |
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Frame work of the plasma membrane (lipid bilayer)
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two back to back layers made up of phospholipids, cholestrerol and glycolipids
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glycoproetins
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integral-extends into or through the lipid bilayer
peripheral proteins are losely attached to the external or internal surface of the membrane |
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Property of the plasma membrane
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selective permaeability
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selective permaeability
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permeable to water, fatty acids, fat soluble vitaminds steriods oxygen and carbondioxide
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what is the plasma membrane not permeable to?
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ions and charged or polar molecules (glucose and amino acids)
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cytoplasm
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site of all intracellular activites except those occuring in the nucleus
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cytosol
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medium in which many of the cell;s chemical reactions occur
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cytolskeleton
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maintains shape and gernal organization of cellular content; responsible for cell movements
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microfilaments
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contribute ot he cells strength and shape
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microvilli
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fingerlike progections of the plasma membrane (absorbtion)
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intermediate filaments
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found in cells dubject to tension and help hold organelles in place
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microtubules
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help determine cell shape and function in both the movement of organells
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centrosome
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centrioles is nine cluster of three microtublules surrounding it ais the pericontriolar material containing hundres of ring shaped proteins called tubuins
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tubulins
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organizing venter for growth of the mitotic spindle
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cilia
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move fluids over a cells surgace
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flagellum
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moves on entire cell
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ribosome
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protein synthesis
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endoplasmic reticulum
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rough er is the site of synthesis of glycoproteins and phosopholips
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smooth er
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site of fatty acids and steriods synthesis
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golgi complex
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accepts proteins forom rough er forms glycoproteins and liporoteins stores packages and exports proteins
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lysosome
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digests worn out organells entrie cells and extracellular material
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perosisome
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detoxifies harmful substances
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mitochondrion
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site of reaction that produce more of a cell's atp
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nucleus
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contains genes which control cellular structure and direct most cellular activites
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active transport
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see notes
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passive transport
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see notes
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