Chapt 15 - mechanisms of cell communication

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  1. an extracellular signal known as a _______ bind to the receptor protein on the surface of a cell membrane
  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
  4. A mechanism for long-range signalling
  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
  8. this type of signaling uses a hormone for communication
  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
  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
  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 _________________
  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
Card Set
Chapt 15 - mechanisms of cell communication
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