BIOL 1080 Study Guide - Final Guide: Calorie, Duodenum, Interferon

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12 Feb 2014
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2 types of glands: exocrine and endocrine: endocrine glands secrete hormones, hormones diffuse into the blood stream, endocrine system consists of: endocrine glands and organs containing endocrine tissue, major glands: pituitary, thyroid, parathyroid, adrenal and pineal, major organs include: hypothalamus, thymus, pancreas, ovaries, testes, heart, placenta, main function: regulate and coordinate other body systems and thereby maintain homeostasis. Negative feedback loops in hormone signaling: negative: the outcome of a process feeds back to the system, shutting the process down, regulate secretion of some hormones, positive: the outcome of a process feeds back to the system and stimulates the process to continue, ex. Chemical: unbroken skin shields body from pathogens, a layer of dead cells form the tough layer of skin, mucous membrane lining in the digestive and respiratory passages, sweat and oil produced by glands in the skin wash away microbes, acidity of secretions slows bacterial growth, lining of the stomach (produces hcl, acidity of urine slows bacterial growth.

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