BIO 203 Study Guide - Final Guide: Autocrine Signalling, Renal Medulla, Opsonin
8 Dec 2017
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Negative feedback control: controlled variable, set point, sensor, integrator, effector, reduces impact of stimulus. Positive feedback control: enhances the original, hasten a process to finish. Open loop: movement without modification: cell physiology. Aquatic organisms: adherence to substrate, prevent being eating, faster movement. Epithelia: cells that cover surfaces that separate organism, exterior and interior cavities, joined by tight junctions. Simple diffusion: probability a molecule will cross an interface. Diffusion speed: x^2=2dt x=distance d=diffusion coefficient t=time. Active transport: energy transport secondary active transport: cannot operate without atp: passive ion transport: driven by concentration gradient; electrical gradient, primary and secondary active transport: occurs against concentration gradient; electrical gradient, neurophysiology intro. Axon terminals: synapse with a target cell. Neurotransmitter: ligand that binds to a ligand-gated channel. Ionotropic: directly opens or closes ion channels: neurophysiology membrane potential. Hyperpolarized: k+ channels open: neurophysiology synapse. Chemical synapses: cells signal to one another, ca2+ released into cleft ca2+ triggers fusion of vesicles, carries information.
