HTHSCI 1H06 Lecture Notes - Lecture 23: Corpus Luteum, Endocrine Gland, Thyroid
3 Jan 2019
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Document Summary
Works by producing hormones in one part of body and circulates through whole body. Compared to neurons that are specifically connected together. Hormones last from minutes while neurotransmitters work from fractions of seconds to minutes. Onset of action is seconds to minutes which is much slower than neurotransmitters that can take only milliseconds. Released by the "ductless glands" throughout the body into the bloodstream. Many of the top drug prescriptions are for hormones. Hypothalamus, pituitary gland, thyroid gland, adrenal glands, pancreas, testes, ovaries. These organs all produce endocrine hormones which are simulated by drugs. Corpus luteum, after egg is ovulated, cells that are there continue to make progesterone. Cushing syndrome due to hypersecretion of cortisol, retains water makes them cushionoid. Diabetes can be due to low amounts of insulin to insensitivity to insulin. Hypothyroidism is often due to a low amount of circulating thyroid hormone and depending on the cause there may be a goiter.
