Hypothalamic Hormones: Functions and Roles
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Questions and Answers

What is the final destination of all blood entering the portal system?

  • Anterior pituitary
  • Pituitary gland
  • General circulation
  • Intended target cells (correct)

    • What is the term for the process illustrated in Figure 18.8?

  • Hormone regulation
  • Endocrine secretion
  • Negative feedback (correct)
  • Positive feedback

    • How many hormones does the anterior pituitary gland secrete?

  • 6 (correct)
  • 5
  • 7
  • 4

    • Which of the following hormones is NOT secreted by the anterior pituitary gland?

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

    What is the function of the hypophyseal portal system?

    <p>Transport of hormones to target cells</p> Signup and view all the answers

    What is the main function of Anti-diuretic hormone (ADH)?

    <p>Increase water absorption into the blood</p> Signup and view all the answers

    Which organ is affected by the action of Anti-diuretic hormone (ADH)?

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

    What is the origin of Anti-diuretic hormone (ADH)?

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

    What would be the result of decreased Anti-diuretic hormone (ADH) production?

    <p>Increased urine production</p> Signup and view all the answers

    What is the opposite function of Anti-diuretic hormone (ADH)?

    <p>Decrease water absorption into the blood</p> Signup and view all the answers

    Where is prolactin synthesized and secreted?

    <p>Anterior pituitary</p> Signup and view all the answers

    What type of cells produce prolactin?

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

    Which of the following hormones is NOT produced by the anterior pituitary?

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

    Prolactin is produced by which part of the pituitary gland?

    <p>Anterior pituitary</p> Signup and view all the answers

    What is the function of lactotrophs in the anterior pituitary?

    <p>To synthesize and secrete prolactin</p> Signup and view all the answers

    What is a potential consequence of altered calcium concentrations in the body fluids?

    <p>Reduced nerve conduction velocity</p> Signup and view all the answers

    Which physiologic process is affected by altered phosphate concentrations in the body fluids?

    <p>Oxidative phosphorylation</p> Signup and view all the answers

    What is a potential consequence of altered calcium and phosphate concentrations in the body fluids?

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

    What is the primary effect of altered calcium concentrations on nerve function?

    <p>Increased neuronal excitability</p> Signup and view all the answers

    Which system is affected by altered calcium and phosphate concentrations in the body fluids?

    <p>Nervous system</p> Signup and view all the answers

    What is the composition of TRH?

    <p>A tripeptide amide</p> Signup and view all the answers

    What is the effect of TRH on the anterior pituitary?

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

    What is the target of TRH stimulation?

    <p>Anterior pituitary</p> Signup and view all the answers

    What is the hormone stimulated by TRH in the anterior pituitary?

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

    What is the role of TRH in the thyroid axis?

    <p>Regulates the hypothalamic-pituitary-thyroid axis</p> Signup and view all the answers

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