Chapter 2 - Cells: The Living Units

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5 Terms

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basic cellular functions

  • each cell performs basic survival functions:

    • obtain and use nutrients

    • dispose of wastes

    • replicate/regenerate/repair

  • these functions are carried out by the cell’s organelles

<ul><li><p>each cell performs basic survival functions:</p><ul><li><p>obtain and use nutrients</p></li><li><p>dispose of wastes</p></li><li><p>replicate/regenerate/repair</p></li></ul></li><li><p>these functions are carried out by the cell’s organelles</p></li></ul><p></p>
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plasma membrane structure: the fluid mosaic model

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membrane lipids: phospholipids

  • amphipathic

  • dynamic arrangement (fluid; ever-changing)

  • creates framework for the plasma membrane

  • makes up 75% of membrane lipids

<ul><li><p>amphipathic</p></li><li><p>dynamic arrangement (fluid; ever-changing)</p></li><li><p>creates framework for the plasma membrane</p></li><li><p>makes up 75% of membrane lipids</p></li></ul><p></p>
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membrane lipids: cholesterol

  • found among the lipid tails of the bilayer

  • only found in animal cells

  • structural integrity of the plasma membrane

<ul><li><p>found among the lipid <strong>tails </strong>of the bilayer</p></li><li><p>only found in animal cells</p></li><li><p>structural integrity of the plasma membrane</p></li></ul><p></p>
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membrane lipids: glycolipids

  • only found in layer facing ECF

  • cellular adhesion and recognition

<ul><li><p>only found in layer facing ECF</p></li><li><p>cellular adhesion and recognition</p></li></ul><p></p>