BIPN 100 Lecture Notes - Lecture 13: Skeletal Muscle, Diabetes Insipidus, Alpha Motor Neuron
28 Jun 2018
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BIPN100 Lecture 13 Notes 5/2/18
- Anterior pituitary gland
oReceives feedback from hypothalamus
Hypothalamus release hormones,
telling anterior pituitary gland to
release its own hormones
Those hormones are released into
the bloodstream and travel to
another endocrine gland (thyroid
gland, adrenal cortex, liver, etc.)
They release hormones to go the
nonendocrine targets
Trophic hormones: hormones
released by anterior pituitary
hormones and hypothalamus. Tropic hormones are ones that cause release of
additional hormones
- Hypothalamic hormones
oTRH: thyrotropin releasing hormone
oCRH: corticotropin releasing hormone
oGHRH: growth hormone releasing hormone
oSomatostatin: growth hormone inhibiting hormone
oGnRH: gonadotropin releasing hormone
oDopamine
- Anterior pituitary hormones
oTSH: thyroid stimulating hormone
oACTH: adrenocorticotropic hormone
oGH: growth hormone
oGonadotropins: FSH and LH. Follicle stimulating hormone and luteinizing hormone
oProlactin
- Hormones released by endocrine targets
oThyroid gland -> thyroid hormones (T3 and T4) -> metabolism
oAdrenal cortex -> cortisol (stress hormone)
oLiver and other tissues -> growth factors -> protein synthesis, tissue repair, muscle mass
oEndocrine cells of gonads -> androgens, estrogens, progesterone -> hormone secretion,
organ development, reproduction
- Feedback loops in the hypothalamic-pituitary pathway
oTrophic hormone controls secretion of another hormone
oPathways in which anterior pituitary hormones act as trophic hormones are complex
endocrine reflexes
oInvolves 3 integrating centers
Hypothalamic stimulation from CNS
Anterior pituitary stimulation from hypothalamic trophic hormones
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Document Summary
Anterior pituitary gland: receives feedback from hypothalamus. Hypothalamus release hormones, telling anterior pituitary gland to release its own hormones. Those hormones are released into the bloodstream and travel to another endocrine gland (thyroid gland, adrenal cortex, liver, etc. ) They release hormones to go the nonendocrine targets. Trophic hormones: hormones released by anterior pituitary hormones and hypothalamus. Tropic hormones are ones that cause release of additional hormones. Hypothalamic hormones: trh: thyrotropin releasing hormone, crh: corticotropin releasing hormone, ghrh: growth hormone releasing hormone, somatostatin: growth hormone inhibiting hormone, gnrh: gonadotropin releasing hormone, dopamine. Anterior pituitary hormones: tsh: thyroid stimulating hormone, acth: adrenocorticotropic hormone, gh: growth hormone, gonadotropins: fsh and lh. Follicle stimulating hormone and luteinizing hormone: prolactin. Feedback loops in the hypothalamic-pituitary pathway: trophic hormone controls secretion of another hormone, pathways in which anterior pituitary hormones act as trophic hormones are complex endocrine reflexes, involves 3 integrating centers. Anterior pituitary stimulation from hypothalamic trophic hormones.
