HLTH1030 Lecture 11: HLTH1030-Lecture 11
7 Nov 2018
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Hormones: produced by endocrine glands, secreted directly into the blood, bind to cell receptors and trigger a response. Indirect communication ligands bind receptor, cell signalling through signal transduction inside the cell: same hormone can cause different responses in different cell types. Amino-acid derivative hormones: derivatives of single amino acids, catecholamines and thyroid hormones, thyroid hormones - more like steroidal hormones as bind to intracellular receptors, e. g. Endocrine glands: produce hormones, typically have a rich vascular and lymphatic drainage. Lack ducts (secretion into blood) for rapid dispersal of hormones throughout body: e. g. pituitary, thyroid, parathyroid, adrenal, and pineal glands. Hypothalamus (cid:862)integration centre(cid:863) for (cid:373)a(cid:374)y physiologi(cid:272)al pro(cid:272)esses i(cid:374) the (cid:271)ody: made up of nervous tissue and contains groups of specialized neurons. = infundibulum: two hormones released, adh, oxytocin. Hypothalamus and posterior pituitary: antidiuretic hormone (adh), released to conserve water, acts on distal tubules in kidney, oxytocin, released during childbirth and lactation. Human growth hormone (hgh: growth hormone-releasing hormone (ghrh) stimulates.
