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5 Written Questions

5 Matching Questions

  1. Intracellular Receptors
  2. ligand-gated ion channel
  3. What is the source of phophate in a phosphorylation cascade?
  4. quorum sensing
  5. Synaptic Signaling (local)
  1. a A nerve cell releases neurotransmitter molecules into the synapse, stimulating the target cell
  2. b type of membrane receptor containing a region that can act as a "gate" when the receptor changes shape
    when the signaling molecule bindsas a ligand to the receptor protein, the gate opens or closes, allowing or blocking the flow of specific ions
  3. c concentration of signaling molecules allowing bacteria to sense the local density of other bacterial cells
  4. d ATP
  5. e found in either the cytoplasm or in the nucleus of target cells
    chemical signaling messengers must pass through the membrane to reach this receptor, so the chemical messengers are either hydrophobic, or small enough to cross the membrane (ex. steroid and thyroid hormones in animals)

5 Multiple Choice Questions

  1. enzyme that transfers phospate groups from ATP to a protein (these include many of the relay molecules in signal transuction pathways)
  2. A chemical signal is detected when signaling molecule binds to a receptor protein located at the cell's surface or inside the cell
  3. enzymes that can rapidly remove phophate groups from proteins (a process called dephosphorylation)
  4. transduction signal finally triggers some sort of response
  5. large relay proteins to which other proteins are simultaneously attached

5 True/False Questions

  1. cAMP usually direclty activates...?protein kinase A

          

  2. apoptosisaggregations of bacteria that often form recognizable structures containing regions of specialized function

          

  3. Signal Transductoin PathwayBinding of the signaling molecule changes the receptor protein in some way, initating the conversion of a signal to a form to a form that can bring about a specific cellular response

          

  4. TransuductionBinding of the signaling molecule changes the receptor protein in some way, initating the conversion of a signal to a form to a form that can bring about a specific cellular response

          

  5. Hormonal Signaling (long-distance)Specialized endocrine cells secrete hormones into body fluids (often the blood)

          

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