Anterior Pituitary

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Key Points

  • Anterior Pituitary
    • One of two lobes of pituitary gland, located beneath the Hypothalamus
    • Regulated by Hypothalamus
      • By hormones in hypophyseal portal system
        • blood capillaries that enable hormones secreted from the hypothalamus to directly reach the anterior pituitary without being diluted in the circulation
    • Glandular tissue releases 6 peptide hormones
      • Follicle Stimulating Hormone (FSH)
        • Stimulates the growth of ovarian follicles and spermatogenesis
      • Luteinizing Hormone (LH)
        • Acts on ovaries to stimulates the production of estrogen in females
        • Acts on testes to stimulate the production of testosterone in males
      • Adrenocorticotropic Hormone (ACTH)
        • Acts on adrenal gland to stimulate the production of cortisol
      • Thyroid Stimulating Hormone (TSH)
        • Acts on thyroid gland to stimulate the production of thyroid hormones T3 and T4s
      • Growth Hormone (GH)
        • Directly acts to stimulates muscle, bone, and other cell growth
      • Prolactin
        • Directly stimulates the production of milk from mammary glands
      • β-endorphins