BIOL 1412 Lecture Notes - Lecture 18: Sella Turcica, Thyroid, Anterior Pituitary

• School: University of Manitoba
• Department: Biological Sciences
• Course: BIOL 1412
• Professor: Ibrahima Diallo

Document Summary

Topic xviii: 1endocrine system: endocrine system overview: Ductless glands and endocrine tissues within other organs. Transported via circulation and act on target cells. Target cell = cell with receptor specific for that hormone: hormone classes, steroids. E. g. testosterone, estrogen, vitamin d: hormones derived from amino acids: E. g. derived from tyrosine: thyroxine /t4. Controls cellular metabolism, growth, development: epinephrine + norepinephrine (catecholamines) Short term stress - part of fight-or-flight response: peptides and proteins hormones. Chains of amino acids held together by peptide bonds. E. g. oxytocin, antidiuretic hormone (adh), growth hormone (gh), insulin: endocrine glands. Glands with no other function: pituitary gland. Lies in sella turcica of sphenoid bone. Anterior pituitary hormone secretion regulated by hormones released from the hypothalamus. Metabolism hormones: growth hormone promotes growth + metabolism, thyroid stimulating hormone (tsh) Stimulates activity of thyroid gland: adrenocorticotropic hormone (acth) Stimulates secretion of adrenal steroids (adrenal cortex) Reproductive hormones: luteinizing hormone (lh, follicle stimulating hormone (fsh, prolactin (prl)