NEUR 3304 Study Guide - Comprehensive Final Guide: Castrato, 21 Days, Premature Ejaculation
29 Nov 2016
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Messengers that cause changes in various parts of the body. Hormone: organic chemical messengers produced and released by specialized glands known as the endocrine glands and cause a biological response. Released by glands into the bloodstream where they act on target organs throughout the body. Coordinate physiology and behaviour of animals by control, regulations, and integration of bodily function. Hormones can directly influence a cell that has receptors for a particular hormone: specific number of receptors must be available for specific hormone to produce any effects. First experiments demonstrated that the testis contained a substance responsible for altering behaviour and phenotype of roosters: castrated roosters do not develop properly, transplanted the testis of another rooster onto castrated rooster roosters developed normally. Did not need to have their own genitalia to develop normally: believed that genitals were connected to the nervous system. Second group: castrated, re-implanted one testis into abdominal cavity ensuring that original vascular and neural connections severed.
