Basics of Nerves and the Nervous System

Basics of Nerves and the Nervous System - o When action...

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Basics of Nerves and the Nervous System 27/02/2008 10:56:00 Sodium Potassium Pump High charge and concentration gradient for sodium Outside is positively charged, inside in negatively charged Eventually -70 mV (millivolts) resting potential, (membrane potential) Concept of Membrane Potential Dendrite must get appropriately stimulated Sodium channels in membrane open Membrane potential may reach “action” potential o This causes sodium channels along axon to open o Action potential becomes self repeating and travels down axon After reaching action potential: o Sodium channels close o Sodium Potassium pump kicks on again
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Unformatted text preview: o When action potential is reached, cell is said to be depolarized • Speed of propogation (repetition) o Maintenance of action potential o Re : Myelin Sheath (protein be secreted) is Similar to mitochondria o (Multiple Sclerosis) body attacks myelin sheath • Sour, Salty, Bitter, Sweet receptors for taste • Mechanism for touch reception o One mechanism for touch is displacement of body hairs o Pacinian Corpuscle ← Hearing • Cochlea • Parallel b/w hearing and valance’\ ← Semi circulart canals ‘ 27/02/2008 10:56:00 ← 27/02/2008 10:56:00 ←...
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This note was uploaded on 04/07/2008 for the course BIO 120 taught by Professor Brunkow during the Spring '08 term at Southern Illinois University Edwardsville.

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Basics of Nerves and the Nervous System - o When action...

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