BIOL 3306 Lecture Notes - Lecture 2: Nernst Equation, Bioelectromagnetics, Voltmeter

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Major components and functions of the ns (nervous sys) The effect of hormones are long lasting but short lived. Integrate, process+ coordinate sensory data and motor commands. Includes all neural tissues outside cns: divided in sensory division and motor division. Brings info to cns from receptors in peripheral tissues and organs. Special sensory receptors: provides sensation of smell, taste, vision, balance, hearing. Carries motor commands from cns to peripheral tissues and systems. Autonomic nervous sys(ans): provides automatic regulation of smooth, cardiac muscles ,glands, adipose tissues. Composition of the nervous system - neurons and the i(cid:373)porta(cid:374)(cid:272)e of the eve(cid:374)ts at the (cid:373)e(cid:373)(cid:271)ra(cid:374)e . Signal integration- graded potential(passive, no energy required, varies in magnitude, 2- 3 min decrement,ecs-electron current spread) in axon hillock. Nt: pla(cid:374)ts do(cid:374)"t have a ns (cid:271)ut they have a (cid:373)e(cid:373)(cid:271)ra(cid:374)e so ele(cid:272)tri(cid:272)al i(cid:373)pulses (cid:272)a(cid:374) (cid:271)e triggered- open of ca+ Membrane potential refers to the cell voltage difference across their membrane.

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