W6 - COMPONENTS PLASMA MEMBRANE

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1
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Triglyceride (lipid)

  • solid (fats) or liquid (oil)

  • stored energy (largest)

  • insulation and protection

<ul><li><p>solid (fats) or liquid (oil)</p></li><li><p>stored energy (largest)</p></li><li><p>insulation and protection</p></li></ul><p></p>
2
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Phospholipid (lipids)

  • modified triglyceride

    • amphipathic

  • cell membranes

  • 2 tails instead of 3

<ul><li><p>modified triglyceride</p><ul><li><p>amphipathic</p></li></ul></li><li><p>cell membranes</p></li><li><p>2 tails instead of 3</p></li></ul><p></p>
3
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cholesterol (lipid)

  • cell membrane

  • steroid hormones

  • vit d

  • bite salts

<ul><li><p>cell membrane</p></li><li><p>steroid hormones</p></li><li><p>vit d</p></li><li><p>bite salts</p></li></ul><p></p>
4
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Semi-permeable phospholipid bilayer

  • phospholipids arranged as a bilayer

    • amphipathic - water loving and hating component

    • hydrophilic (polar) head that can be contacted w/ water

    • hydrophobic (non-polar) tail move away from water

  • water-soluable substance cannot cross phospholipids

  • lipid-soluable substances can cross plasma membrane

<ul><li><p>phospholipids arranged as a bilayer</p><ul><li><p><strong>amphipathic</strong> - water loving and hating component</p></li><li><p><strong>hydrophilic (polar)</strong> <strong>head</strong> that can be contacted w/ water</p></li><li><p><strong>hydrophobic (non-polar) tail</strong> move away from water</p></li></ul></li><li><p>water-soluable substance cannot cross phospholipids</p></li><li><p>lipid-soluable substances can cross plasma membrane</p></li></ul><p></p>
5
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carbohydrates

  • sugars and starches

    • monosaccharides

    • disaccharides

    • polysaccharides

  • larger CHOs are less soluble

  • functions:

    • Energy (glucose)

    • structural material - cell membrane, DNA/RNA

<ul><li><p>sugars and starches</p><ul><li><p>monosaccharides</p></li><li><p>disaccharides</p></li><li><p>polysaccharides</p></li></ul></li><li><p>larger CHOs are less soluble</p></li><li><p>functions:</p><ul><li><p>Energy (glucose)</p></li><li><p>structural material - cell membrane, DNA/RNA</p></li></ul></li></ul><p></p>
6
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proteins

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7
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Plasma (cell) membrane

  • selectively permeable barrier surrounding cells

  • separates ECF and ICF

  • membrane proteins

    • peripheral on surface

    • integral embedded

  • cholesterol = stability but allows for fluidity

  • carbohydrates = recognition (identifying cells)

<ul><li><p>selectively permeable barrier surrounding cells</p></li><li><p>separates ECF and ICF</p></li><li><p>membrane proteins</p><ul><li><p>peripheral on surface</p></li><li><p>integral embedded</p></li></ul></li><li><p>cholesterol = stability but allows for fluidity</p></li><li><p>carbohydrates = recognition (identifying cells)</p></li></ul><p></p>
8
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membrane proteins

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