Endocrine System Quiz
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Questions and Answers

How do hormones act on their target cells?

  • By direct fusion with the cell membrane
  • By diffusing through the cytoplasm
  • By releasing enzymes into the extracellular space
  • Through their receptors (correct)
  • What is an example of paracrine secretion?

  • Insulin-like growth factor (IGF) production
  • Synthesis of nutrients in endocrine cells
  • Antibody production in adjacent cells
  • Gastrin reaching fundic glands (correct)
  • What is the nature of endocrine glands?

  • They secrete enzymes that act locally on adjacent cells
  • They synthesize nutrients for the body's energy production
  • They produce antibodies for immune response
  • They secrete hormones that are taken up by capillaries and distributed throughout the body (correct)
  • What is the characteristic of juxtacrine secretion?

    <p>Signaling molecules remain on the secreting cell’s surface or adjacent extracellular matrix and affect target cells when the cells make contact</p> Signup and view all the answers

    What is the function of a feedback mechanism in controlling hormone secretion?

    <p>Helps in controlling hormone secretion and keeps the blood hormonal levels within strict limits</p> Signup and view all the answers

    Which type of hormone secretion involves localized dispersal in interstitial fluid or through short loops or blood vessels?

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

    What is the characteristic of juxtacrine secretion?

    <p>Signaling molecules remain on the secreting cell's surface or adjacent extracellular matrix and affect target cells when the cells make contact.</p> Signup and view all the answers

    How do hormones act on their target cells?

    <p>Through their receptors</p> Signup and view all the answers

    What is the nature of endocrine glands?

    <p>They are typically epithelial and aggregated as cords or clusters.</p> Signup and view all the answers

    What is an example of autocrine secretion?

    <p>Cells may produce molecules that act on themselves or on the cells of the same type.</p> Signup and view all the answers

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