HLSC 1F90 Lecture Notes - Lecture 14: Pituitary Gland, Anterior Pituitary, Peptide Hormone
8 Feb 2017
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Topic 14: introduction to endocrinology dr. e. l. tsiani ltsiani@brocku. ca. Are molecules that produced by endocrine cells and are found in different regions in our body. Chemical signals packaged in granules or secretory vesicles. Secreted by a cell or group cells. Endocrine glands or cells into the blood secrete hormones. Only target cells with receptor for the hormones and the signal. Neurohormones are chemicals released by neurons into the blood for action at distant targets. A: the presence of the insulin receptors in the cells. Typically as a measure of the time needed to decrease its concentration in the circulation by 50 % Hormones that are peptide proteins are destined to get out of the endocrine cells so they are exported. Bind carrier proteins in blood: lengthens their half-life. Adrenal gland (cortex) can produce hormones that are steroids. Most amine hormones come from the amino acid tyrosine.
