PNB 2265 Lecture Notes - Lecture 10: Pancreatic Polypeptide, Adrenal Medulla, Venule
11 Sep 2017
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Interacts with nervous and immune system: metabolism, reproduction, vascular function, cell growth and differentiation. What is a hor(cid:373)o(cid:374)e? (cid:894)(cid:862)i ex(cid:272)ite or arouse(cid:863)(cid:895: hormones are blood-borne chemical signals, hormones travel by blood and bind to receptors on specific target cells, target cells respond to specific hormones (distant target organs) Endocrine tissues and cells: endocrine glands, pancreas, parathyroid, pituitary, thyroid, adrenal, gonads, and placenta, endocrine tissues within other glands, heart, liver, kidney, gi, adipose, other tissues that modify hormones, lungs, skin, liver, kidney. Inferior to larynx: anterior and lateral to trachea. Lateral lobes (bilobule gland: left and right lobes connected by isthmus glands. Parathyroid: chief cells (principal cells, most numerous, small round cells with central nucleus, arranged in irregular clusters, parathyroid hormone (pth, oxyphil cells. Increases the level of ca2+ in the blood: larger cell type, abundant mitochondria, do not secrete hormones. Pancreas: exocrine tissue, most abundant cell type, throughout pancreas, synthesizes and secretes digestive proenzymes and enzymes, endocrine tissue.
