BISC 220Lg Lecture Notes - Lecture 7: Beta Cell, Haemophilia, Fibrin
11 Apr 2016
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Document Summary
Physiology: study of normal functioning of a living animal. You as organism are robust but cells are delicate cells need relatively constant conditions such as ph, osmolarity, ionic [], etc. Point of organ systems: maintain homeostasis (relative maintenance range) Main mechanism of homeostasis: negative feedback regulation of plasma glucose. Is plasma clots: serum (plasma clotting proteins) Blood plasma is in equilibrium with extracellular fluid. Blood plasma contained in capillaries which are leaky. Lumen: hollow material (interior of a hollow organ) Too little glucose: alpha cell in pancreas secretes its hormone glucagon which acts on liver to break down previously stored glucagon. Hallmark of physiological control system: thing being controlled (such as glucose) is important, there are multiple control systems for it. Hypogylcemia: low blood sugar will kill you in minutes because of its effect on brain. Why do you need circulatory system: diffusion is slow form of transport.
