Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 44.2, Problem 3R
Summary Introduction
To review:
The reason that makes the action potential to generate by itself.
Introduction:
The action potential is generated in the neurons in response to a particular stimulus, carried by the sensory neurons. The action potential is generated by opening and closing of various ion channels, like the sodium, potassium, and calcium. The wave created by the action potential is carried in the forward direction.
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Is an action potential more or less likely under these conditions? Explain.
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How does the Action Potential Propagation occur?
Chapter 44 Solutions
Life: The Science of Biology
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- What is a synapse? Explain the difference between an excitatory and an inhibitory synapse.arrow_forwardWhy do neurotransmitters have to be removed from the synapse?arrow_forwardConformational changes in channel proteins brought about by voltage changes are responsible for opening and closing Na+ and K+ gates during the generation of an action potential. (True or false?)arrow_forward
- Assume presynaptic excitatory neuron A terminates on a postsynaptic cell near the axon hillock and presynaptic excitatory neuron B terminates on the same postsynaptic cell on a dendrite located on the side of the cell body opposite the axon hillock. Explain why rapid firing of presynaptic neuron A could bring the postsynaptic neuron to threshold through temporal summation, thus initiating an action potential, whereas firing of presynaptic neuron B at the same frequency and the same magnitude of EPSPs may not bring the postsynaptic neuron to threshold.arrow_forwardWhat is action potential?arrow_forwardWhat does it mean for an action potential to be an “allor none” event?arrow_forward
- What letter(s) represent the starting point of an action potential?arrow_forwardHow much of a change in the membrane potential is necessary for the summation of postsynaptic potentials to result in an action potential being generated?arrow_forwardList three ways in which action potentials can be initiated in neurons?arrow_forward
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