Topic 6.5 Neurons & Synapses Preview of Understanding I
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  1. 6.5.U1 Neurons transmit electrical impulses.
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  1. 6.5.U2 The myelination of nerve fibers allows for saltatory conduction.
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  1. 6.5.U3 Neurons pump sodium and potassium ions across their membranes to generate a resting potential.
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  1. 6.5.U4 An action potential consists of depolarization and repolarization of the neuron.
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  1. 6.5.U5 Nerve impulses are action potentials propagated along the axons of neurons.
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  1. 6.5.U6 Propagation of nerve impulses is the result of local currents that cause each successive part of the axon to reach the threshold potential.
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  1. 6.5.U7 Synapses are junctions between neurons and receptors or effector cells.
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  1. 6.5.U8 When presynaptic neurons are depolarized they release a neurotransmitters into the the synapse.
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  1. 6.5.U9 A nerve impulse is only initiated if the threshold potential is reached.
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Linda Kilch