PHYS20008 Lecture Notes - Lecture 13: List Of Sega Arcade System Boards, Pituitary Gland, Lipophilicity
8 May 2019
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Document Summary
A hormone is blood-borne chemical mediator released from endocrine glands that act on distant target tissues. Exocrines are different as they use a duct. Endocrine glands can produce many hormones (pituitary) Hormones can be produced by multiple glands. Tropic hormones is a hormone that controls the secretion of another hormone. Lipophilic hormones are able to cross cell membranes and act intracellularly. Hydrophilic hormones dissolve in water and target receptors on the cell membrane. Hydrophilic (dissolve in water) act on surface. Must be released from cells in active ways (channels, vesicles etc) because it can"t cross membrane. Don"t move through blood stream well because of this requires a carrier protein while moving around. Hydrophilic = quick hit and then gone. Generate and intracellular signal or second messenger" (cascade) This modifies the membrane transport and thus metabolism is changed. Altering gene expression and production of new proteins.
