Basics.txt

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Author:
JLeezy
ID:
175524
Filename:
Basics.txt
Updated:
2012-10-04 13:32:02
Tags:
PSL Physiology
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Description:
Lectures 1-4
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    • author "JLeezy"
    • tags "PSL"
    • description "Lectures 1-3"
    • fileName "Basics"
    • freezingBlueDBID -1.0
    • Movement of intermembrane proteins
    • Only laterally (left/right)
  1. Cholesterol
    Stiffens membranes and increases fluidity
  2. Phospholipids
    Amphipathic structures that form lipid bilayers and micelles.
  3. What can go through the plasma membrane?
    Hydrophilic molecules; ions are kept out.
  4. Na+/K+ Pump
    An antiport; 3Na+ for every 2K+
  5. Equation for osmolarity
    # of dissociated ions * concentration
  6. "Magic number" for iso-/hypo-/hypertonic cells
    300 mOsm
  7. Fick's Law (diffusion)
    • J=ΔC×(DA÷Δx)
    • D is the diffusion coefficient; larger molecules have a larger one.
  8. Vant Hoff's Law (osmosis)
    • π=nRTΔC
    • RT represents the free energy due to temp.
  9. Nernst Potentials (Na+, K+, Ca++)
    • Na+= +60 mV
    • K+= -90 mV
    • Ca++= +120 mV

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