Q:

The pituitary gland

safaTerkawi
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2022-08-15
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The pituitary gland.

  1. Regulates activity in all other endocrine glands.
  2. Output of prolactin is regulated by hypothalamic releasing factors.
  3. Secretes antidiuretic hormone when blood osmolality falls.
  4. Has an intermediate lobe which secretes melanotropin.
  5. Responds to nervous and hormonal influences from the brain.
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safaTerkawi
2022-08-15
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A. False For example, parathyroid activity is not regulated by the pituitary.

B. True Output can be increased and decreased by the action of prolactin-releasing hormone (PRH) or prolactin-inhibiting hormone (PIH) respectively.

C. False ADH is secreted by the posterior pituitary in response to a rise in blood osmolality.

D. True This may stimulate melanin production in human melanocytes.

E. True The anterior pituitary is influenced by hormones arriving in portal-hypophyseal vessels and the posterior pituitary by impulses travelling in the hypothalamohypophyseal tract.

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