NROB60H3 Lecture Notes - Lecture 5: Resting Potential, Lipid Bilayer, Extracellular Fluid
10 Jun 2017
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Chapter 3 - the neuronal membrane at rest. Neuron conducts info over a distance by using electrical signals that sweep along the axon. Electrical charge in the cytosol of the axon is carried by electrically charged atoms (ions) Axonal membrane has properties that enable it to conduct a nerve impulse (action potential) Potential separation of electrical charge across the membrane. Action potentials don"t diminish over distance signals of fixed size and duration. Excitable membrane membranes of cells capable of generating and conducting action potentials. When cell with excitable membrane isn"t generating impulses at rest. Cytosol along the side surface of the membrane has (-) electrical charge compared to the outside. Difference i electrical charge across membrane resting membrane potential. Water = main ingredient of both the fluid inside the neuron (intracellular fluid/cytosol) and the outside fluid that bathes neuron (extracellular fluid) Ions dissolved in this water re responsible for resting and action potentials.
