4.5

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Author:
see.jerald
ID:
77744
Filename:
4.5
Updated:
2011-04-06 22:01:26
Tags:
structure membranes correlates their functions
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Description:
The structure of membranes correlates with their functions
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  1. What are the two distinct regions in a phospholipid?
    a negatively charged and thus hydrophilic phosphate head two non polar hydrophobic fatty acides
  2. The top is the hydrophilic head

    The P is the phosphate group

    the bottle is the hydrophobic tails
  3. Hydrophilic heads face___?
    outward
  4. Hydrophobic heads tails point inward
    mingling together and shielded from water
  5. What is a plasma membrane? and what does it do?
    The boundary between the living cells and it's surroundings, controls the traffic
  6. What are the main components of biological membranes?
    phosolipids
  7. What are the 2 distinct regions in a phospholipid bilayer?
    a negatively charged and thus hydrophilic phophate group (head) and two non polar, hydrophobic fatty acid tails
  8. What are attached to the phospholipid bilayers?
    proteins
  9. What kind of molecules can pass through the bilayer and which ones?
    • non polar molecules,
    • such as 02 and CO2
  10. What is a way a molecule passes through the bilayer?
    form channels

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