Cell Signaling and Signaling Molecules Quiz
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Questions and Answers

What is the process by which cells communicate with each other?

  • Cell signaling (correct)
  • Cell division
  • Cell excretion
  • Cell metabolism
  • Which type of signaling can occur over short or long distances?

  • Autocrine signaling
  • Juxtacrine signaling
  • Paracrine signaling (correct)
  • Neurocrine signaling
  • What are molecules that are released by cells to communicate with other cells called?

  • Structural molecules
  • Signaling molecules (correct)
  • Transport molecules
  • Excretory molecules
  • Where are G protein-coupled receptors (GPCRs) located?

    <p>On the cell membrane</p> Signup and view all the answers

    What type of receptors are tyrosine kinase-linked receptors (TKs)?

    <p>Transmembrane proteins</p> Signup and view all the answers

    What do G protein-coupled receptors (GPCRs) activate when a signaling molecule binds to them?

    <p>The G protein</p> Signup and view all the answers

    What is the function of the tyrosine kinase domain in tyrosine kinase-linked receptors (TKs)?

    <p>It phosphorylates other proteins</p> Signup and view all the answers

    What are the three main types of cell surface receptors mentioned in the text?

    <p>GPCRs, TKs, and another type</p> Signup and view all the answers

    What are the molecules released by cells to communicate with other cells called?

    <p>Signaling molecules</p> Signup and view all the answers

    What type of proteins are receptors?

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

    What happens when a signaling molecule binds to a G protein-coupled receptor (GPCR)?

    <p>It activates the G protein</p> Signup and view all the answers

    Where are tyrosine kinase-linked receptors (TKs) located?

    <p>On the cell membrane</p> Signup and view all the answers

    What happens when a signaling molecule binds to an ion channel-linked receptor?

    <p>It opens the ion channel pore</p> Signup and view all the answers

    What is the function of cell surface receptors?

    <p>Receiving and transmitting signals</p> Signup and view all the answers

    Where are nuclear receptors located?

    <p>In the nucleus of the cell</p> Signup and view all the answers

    What activates the cAMP pathway?

    <p>A signaling molecule binding to a G protein-coupled receptor (GPCR)</p> Signup and view all the answers

    What does cAMP activate in the cAMP pathway?

    <p>Protein kinase A (PKA)</p> Signup and view all the answers

    What regulates the activity of adenylate cyclase?

    <p>Hormones, neurotransmitters, and growth factors</p> Signup and view all the answers

    Where are cytoplasmic receptors located?

    <p>In the cytoplasm of the cell</p> Signup and view all the answers

    What is the role of phosphodiesterase in the cAMP pathway?

    <p>It breaks down cAMP</p> Signup and view all the answers

    What is the importance of the cAMP pathway?

    <p>It is involved in a variety of cellular processes</p> Signup and view all the answers

    What does PKA phosphorylate in the cAMP pathway?

    <p>Other proteins</p> Signup and view all the answers

    What does the opening of the ion channel pore allow?

    <p>Ions to flow into or out of the cell</p> Signup and view all the answers

    How do cell surface receptors provide information to the cell?

    <p>By receiving signals from signaling molecules</p> Signup and view all the answers

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