CH 4 bio outline

CH 4 bio outline - CH 4: NEURON CONDUCTION AND SYNAPTIC...

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CH 4: NEURON CONDUCTION AND SYNAPTIC TRANSMISSION I. The Resting Membrane Potential a. Membrane potential i. Electrical gradient ii. Polarized iii. Typical resting potential: -70 mV b. Ionic basis of the resting potential i. Ions ii. Forces acting on ions 1. concentration gradient 2. electrostatic pressure iii. Ions that contribute to the resting potential 1. Sodium (Na+) 2. Chloride (Cl-) 3. Potassium (K+) 4. Negatively charged proteins iv. The membrane 1. Selective permeability 2. ion channels 3. How the concentration gradient and electrostatic pressure act on ions 4. Sodium-potassium pump II. Post-Synaptic Potentials a. Excitatory postsynaptic potential (EPSP) i. Depolarization ii. Na+ b. Inhibitory postsynaptic potential (IPSP) i. Hyperpolarization ii. K+ and/or Cl- c. Graded subthreshold responses d. Decremental e. Net effect i. Spatial summation ii. Temporal summation III. The Action Potential a. Threshold of excitation (approx. -65 mV) b. Depolarization and reversal of polarity c. All or none
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This note was uploaded on 04/28/2008 for the course PSYCH 367 taught by Professor Rollins during the Spring '08 term at Tulane.

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CH 4 bio outline - CH 4: NEURON CONDUCTION AND SYNAPTIC...

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