Hormone Secretion Mechanisms Quiz
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Questions and Answers

What is the main difference in the circulation of hydrophilic and lipophilic hormones?

  • Hydrophilic hormones are rapidly eliminated from circulation, while lipophilic hormones circulate mainly bound to plasma proteins. (correct)
  • Hydrophilic hormones circulate unbound in the blood, while lipophilic hormones are quickly broken down in plasma.
  • Lipophilic hormones are rapidly eliminated from circulation, while hydrophilic hormones circulate mainly bound to plasma proteins.
  • Hydrophilic hormones have a long half-life due to binding to plasma proteins, while lipophilic hormones are rapidly eliminated.

    • What is the function of negative feedback in hormone systems?

  • It promotes hormone secretion by enhancing the activity of target tissues.
  • It prevents overactivity of hormone systems by suppressing further hormone release. (correct)
  • It accelerates the clearance of hormones from plasma.
  • It prolongs the half-life of hormones in circulation.

    • What effect does binding to plasma proteins have on the half-life of lipophilic hormones?

  • It has no effect on the half-life of lipophilic hormones.
  • It prolongs the half-life by slowing down hormone clearance from plasma. (correct)
  • It reduces the effectiveness of lipophilic hormones at target tissues.
  • It shortens the half-life by accelerating hormone elimination from the blood.

    • Which mechanism can lead to surges of hormones?

    <p>Positive feedback control</p> Signup and view all the answers

    What does the term 'half-life' refer to in relation to hormones?

    <p>The time required for blood level of a hormone to be reduced by half</p> Signup and view all the answers

    How does negative feedback control prevent over-secretion of hormones?

    <p>It suppresses further hormone release when conditions or products from the hormone indicate sufficient levels.</p> Signup and view all the answers

    What role does binding to plasma proteins play in the circulation of lipophilic hormones?

    <p>It slows down hormone clearance from plasma, leading to a long half-life.</p> Signup and view all the answers

    What is the main effect of positive feedback control on hormone secretion?

    <p>It leads to surges in hormone secretion by promoting additional release.</p> Signup and view all the answers

    In what way do hydrophilic hormones differ from lipophilic hormones in terms of their plasma levels?

    <p>Hydrophilic hormones are not bound to plasma proteins, while lipophilic hormones mainly circulate bound to proteins.</p> Signup and view all the answers

    What is the primary function of neuroendocrine reflexes in controlling hormone secretion?

    <p>They coordinate responses between the nervous and endocrine systems for hormonal regulation.</p> Signup and view all the answers

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