Feedback Control of Hormone Secretion Quiz
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Questions and Answers

What type of control mechanism is primarily responsible for ensuring a proper level of hormone activity at the target tissue?

  • Neutral feedback mechanisms
  • Feedback mechanisms are not involved in hormone regulation
  • Negative feedback mechanisms (correct)
  • Positive feedback mechanisms
  • In the context of hormone secretion, what role do conditions or products resulting from the action of the hormone play?

  • Enhance further release of the hormone
  • Have no effect on hormone secretion
  • Suppress further release of the hormone (correct)
  • Convert hormones into different types
  • At which levels can feedback regulation of hormones occur?

  • Only at the level of target tissue activity
  • Only at the level of hormone synthesis
  • Only at the level of gene transcription
  • At all levels, including gene transcription and synthesis steps (correct)
  • What variable is sometimes the focus of control in hormone regulation?

    <p>The degree of activity of the target tissue</p> Signup and view all the answers

    Under what circumstances will feedback signals to an endocrine gland slow further synthesis and secretion of a hormone?

    <p>When the target tissue activity is high</p> Signup and view all the answers

    What type of surges in hormones can occur with positive feedback?

    <p>Surges that reinforce hormone secretion</p> Signup and view all the answers

    What is the main cause of the surge of luteinizing hormone (LH) before ovulation?

    <p>The stimulatory effect of estrogen on the anterior pituitary</p> Signup and view all the answers

    What effect does the secretion of LH have on the ovaries?

    <p>Stimulates additional secretion of estrogen</p> Signup and view all the answers

    How does typical negative feedback control of hormone secretion occur?

    <p>When LH reaches an appropriate concentration</p> Signup and view all the answers

    What are some factors that influence periodic variations in hormone release?

    <p>Seasonal changes, diurnal cycle, and sleep</p> Signup and view all the answers

    How are cyclical variations in hormone secretion affected by circadian clocks?

    <p>Circadian clocks drive part of the oscillations</p> Signup and view all the answers

    Which brain structure serves as a 'master clock' controlling rhythmic patterns in many parts of the body?

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

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