BISC 320 Lecture Notes - Lecture 14: Siblicide, Circadian Rhythm, 21 Days
9 Oct 2017
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Document Summary
Physiological effects of these hormones are to increase heart rate, increase respiratory inspiration, increase vasoconstriction to specific parts of the body, like surfaces and gut mucosa. In digestion, increased glucagon and decreased insulin secretion, which raises blood glucose and fat is broken down for fuel. It signals the neurosecretory cells of the hypothalamus to release vasopressin from the posterior pituitary, causing vasoconstriction and concentration of water. The hypothalamus also releases corticotropin releasing hormone, or crh, which enhances sympathetic stimulation and helps stimulate alertness and memory formation. It also stimulates the anterior pituitary to release adrenocorticotropin hormone, which stimulates the anterior pituitary to secrete beta endorphins to suppress the pain of potential injury or muscle strain. This is why they are called glucocorticoids: because they stimulate the production and release of increased glucose to fuel increased brain and muscle activity. Cort feeds back to the hypothalamus, causing a reduction in the release of gonadotropin releasing hormone, suppressing reproduction.
