Neurotransmitters and Autonomic Nervous System Pathways Quiz
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Questions and Answers

What is a common feature of cell signaling?

  • Similar to enzyme and substrate binding (correct)
  • Signaling is initiated by non-specific binding
  • Low-affinity binding due to high ligand concentration
  • Signal released only by direct diffusion

    • Which type of signaling involves direct contact?

  • Synaptic signaling (correct)
  • Paracrine signaling
  • Autocrine signaling
  • Endocrine signaling

    • What is the duration of a nerve impulse signal?

  • Milliseconds (correct)
  • Long
  • Hours
  • Seconds

    • In cell signaling, why do different cells respond differently to the same signal molecule?

    <p>Cell-type dependent transduction process (B)</p> Signup and view all the answers

    What is a characteristic of a cell surface receptor?

    <p>Initiates signaling pathways upon ligand binding (A)</p> Signup and view all the answers

    Which type of signaling involves the release of a signal by exocytosis?

    <p>Endocrine signaling (C)</p> Signup and view all the answers

    What is the role of GPCRs in physiological processes?

    <p>They are involved in transmitting neuronal signals at synapses (A)</p> Signup and view all the answers

    Which statement accurately describes cell type dependency in the response to signaling molecules?

    <p>Different cells are programmed to respond differently (C)</p> Signup and view all the answers

    What role do intracellular receptors play in cell signaling?

    <p>They act upon binding of hydrophobic, small signaling molecules (C)</p> Signup and view all the answers

    How do cells respond to multiple signals according to the text?

    <p>Cells integrate all the signals they receive (C)</p> Signup and view all the answers

    Which type of receptor is responsible for ion channel opening upon neurotransmitter binding?

    <p>Ion-channel-coupled receptor (B)</p> Signup and view all the answers

    What determines the complexity in cell response to signaling molecules?

    <p>The difference in intracellular signaling proteins and effector proteins (C)</p> Signup and view all the answers

    Which type of receptor is responsible for regulating automatic functions like blood pressure and heart rate?

    <p>G-protein-coupled receptor (C)</p> Signup and view all the answers

    Which type of intracellular signaling molecule is responsible for triggering phosphorylation?

    <p>Protein kinase (phosphorylation) (C)</p> Signup and view all the answers

    What is the main function of a G-protein-coupled receptor?

    <p>Activate ion channels (C)</p> Signup and view all the answers

    Which type of receptor links with enzymes for signaling purposes?

    <p>Serine/threonine-specific protein kinase (C)</p> Signup and view all the answers

    What are the two types of intracellular signaling molecules mentioned in the text?

    <p>Secondary messengers and cAMP (D)</p> Signup and view all the answers

    Which type of receptor is associated with nerves and muscles ion channels?

    <p>Ion-channel-coupled receptor (B)</p> Signup and view all the answers

    What is the function of an enzyme-coupled receptor?

    <p>Trigger autophosphorylation (C)</p> Signup and view all the answers

    Which signaling complex is preformed on a scaffold protein?

    <p>Related intracellular signaling molecules organization (A)</p> Signup and view all the answers

    What is one way specificity is maintained in intracellular signaling?

    <p>'High affinity and specificity' (A)</p> Signup and view all the answers

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