Chapt 15 - mechanisms of cell communication

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jmali921
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55184
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Chapt 15 - mechanisms of cell communication
Updated:
2010-12-12 01:20:47
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Cellular Molecular Biology
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communication
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  1. an extracellular signal known as a _______ bind to the receptor protein on the surface of a cell membrane
    ligand
  2. 2 types of receptors; the majority of receptors. are _______ receptors
    and some receptors are _______
    • cell-surface receptors
    • intracellular receptors
  3. _____ receptors have a hydrophillic signal molecule
    cell-surface
  4. A mechanism for long-range signalling
    axons
  5. 4 ways which signaling may occur
    • contact-dependant
    • paracrine
    • synaptic
    • endocrine
  6. this signal method involves a membrane bound cell
    conact - dependant
  7. this type of signaling method is for short-range
    and cells communicate by autocrine signaling
    paracrine
  8. this type of signaling uses a hormone for communication
    endocrine
  9. this communication requires a transmembrane protein
    cell-surface receptors
  10. this small hydrophobic signal is transported by a carrier protein for this type of communitcation
    intracellular receptors
  11. this type of communication requires a chemical synapse and a neurotransmitter
    synaptic communication
  12. uses the blood stream for a signal path in long-range signaling to the target cell
    endocrine
  13. one way to ensure that neighboring cells act in a coordinated way invloves ___ ___
    gap junctions
  14. gap junctions function to_________________________________________________________________________________________ is signal communication
    permit exchange od small intracellular molecules
  15. T/F: different types of cells can have different responses to the same extracellular signal molecule
    T
  16. different types of cells can have different responses to the same extracellular signal molecule. This is due to 2 things
    • different receptor proteins
    • different intracellular singnalling pathways
  17. some signal molecules enter a targets cell's cytoplasm and bind to ___ ____
    intracellular receptors
  18. Most signal molecules are hydrophilic and therefoe can not diffuse through the lipid bilayer. These hydrophilic surface receptors bind to _________________
    cell-surface-receptors
  19. 3 major families of cell surface receptors
    • ion-channel-coupled receptors
    • G-protein-coupled-receptors
    • enzyme-coupled receptors
  20. all 3 major families of cell-surface receptors are ________ proteins
    transmembrane

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