it14spr201.20ac5t45-58.txt

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GroupA201
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257432
Filename:
it14spr201.20ac5t45-58.txt
Updated:
2014-01-19 19:00:44
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profmwinston
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Description:
Anatomy 201 flashcards: Chapter 5, topics 45-58
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  1. ´╗┐Open and close when the electrical state of the cell changes
    Voltage-gated channels
  2. Respond to physical forces, such as increased temperature or pressure that puts tension on the membrane and pops the channel gate open
    Mechanically gated channels
  3. Carrier protein that moves only one kind of molecule
    Uniport carriers
  4. A carrier that moves more than one kind of molecule at one time
    contransporter
  5. A membrane transport protein that moves two or more molecules in the same direction across a membrane
    Symport carriers
  6. A membrane transport protein that moves two or more molecules in the opposite direction across a membrane
    Antiport carriers
  7. The energy to push molecules against their concentration gradient comes directly from the high-energy phosphate bond ATP
    Primary (direct) active transport
  8. Uses potential energy stored in the concentration gradient of one molecule to push other molecules against their concentration gradient
    Secondary (indirect) active transport
  9. The maximum transport rate that occurs when all carriers are saturated
    Transport maximum
  10. The ability of a transporter to move only one molecule or only a group of closely related molecules
    Specificity
  11. A transporter may move several members of a related group of substrates, but those substrates compete with one another for binding sites on the transporter
    Competition
  12. All active sites on a given amount of protein are filled with substrate and reaction rate is maximal
    Saturation
  13. Barriers used to close openings
    Gates
  14. Directly proportional to membrane surface area concentration gradient, and membrane permeability, and inversely proportional to membrane thickness across a membrane
    Simple diffusion

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