Hormones and Pituitary Gland Functions

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BeneficentFortWorth
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6 Questions

Which hormone stimulates the release of adrenocorticotropic hormone (ACTH) from the anterior pituitary gland?

Thyrotropin-releasing hormone (TRH)

What is the secondary trigger for the release of thyroid-stimulating hormone (TSH)?

Low fatty acid levels

Which structure releases growth hormone releasing hormone (GHRH)?

Arcuate nucleus

What inhibits the release of prolactin from the pituitary gland when levels are high?

Dopamine

What stimulates the thyroid gland to produce thyroid hormones?

Thyrotropin-releasing hormone (TRH)

What does GnRH released from the preoptic area stimulate the pituitary gland to release?

Follicle-stimulating hormone (FSH)

Study Notes

  • Paraventricular nucleus secretes corticotropin-releasing hormone (CRH) and thyrotropin-releasing hormone (TRH)
  • CRH stimulates the release of adrenocorticotropic hormone (ACTH) from the anterior pituitary gland
  • ACTH stimulates the production of cortisol and other steroids by the adrenal glands
  • TRH stimulates the release of thyroid-stimulating hormone (TSH) from the anterior pituitary gland
  • TSH stimulates the thyroid gland to produce thyroid hormones
  • Arcuate nucleus releases growth hormone releasing hormone (GHRH) and prolactin inhibiting hormone (Dopamine)
  • GHRH stimulates the pituitary gland to release growth hormone (GH)
  • Dopamine inhibits the release of prolactin from the pituitary gland when levels are high, but stimulates its release when levels are low
  • GnRH released from the preoptic area stimulates the pituitary gland to release follicle-stimulating hormone (FSH) and luteinizing hormone (LH)
  • FSH and LH regulate the development, growth, and function of the gonads (ovaries and testes)
  • Secondary triggers for the release of TSH, ACTH, CRH, and TRH include fever, hypoglycemia, stress, and cold temperatures.
  • Growth hormone can also be released in response to low glucose levels, high amino acid levels, and low fatty acid levels, as well as exercise and stress.
  • Prolactin can be released in response to breastfeeding, estrogen levels, and certain drugs.
  • Oxytocin is the focus of the next video.

Test your knowledge of the hormones secreted by the paraventricular nucleus, arcuate nucleus, and preoptic area, and their roles in stimulating the release of various hormones from the pituitary gland. Explore the secondary triggers for hormone release and the factors influencing the secretion of growth hormone, prolactin, and oxytocin.

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