Cell Signal Transduction Mechanisms Quiz
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Questions and Answers

Which enzyme plays a central role in energy metabolism and is activated by an increase in a cell's AMP:ATP ratio?

  • Lipase
  • AMP-activated protein kinase (AMPK) (correct)
  • Amylase
  • PFK-2
  • What effect does AMPK have on anabolic pathways?

  • Switches them on
  • Has no effect on them
  • Activates them
  • Switches them off (correct)
  • In cardiac cells, how does AMPK stimulate glycolysis?

  • By decreasing glucose transporters
  • By reducing ATP levels
  • By activating PFK-2 (correct)
  • By inhibiting PFK-2
  • What is the function of insulin in terms of glucose transport across the plasma membrane of target cells?

    <p>Promotes glucose transport</p> Signup and view all the answers

    Which molecule regulates de novo fat synthesis from excess glucose molecules?

    <p>AMPK</p> Signup and view all the answers

    What is the process that AMPK promotes in cardiac and skeletal muscle to increase glycolysis?

    <p>Recruitment of glucose transporters to plasma membrane</p> Signup and view all the answers

    Which regulatory pathway does AMPK switch off?

    <p>Lipid synthesis</p> Signup and view all the answers

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