Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Describe the sequence of activation of ion channels leading to action potential propagation.
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- Describe the distribution of voltage gated ion channels in the nodes of Ranvier-vs-trigger zone/axonarrow_forwardDuring the _____ phase of an action potential, the membrane potential is more positive than the resting potential, but potassium is leaving the cell and sodium is no longer entering, so membrane potential is _____.arrow_forwardDescribe the role of the axon hillock in generating action potentials.arrow_forward
- starting with an axon that is maintaining a resting potential, describe the sequence of events that causes the generation of an action potential, including the electrical charges and ions involved.arrow_forwardDescribe the four stages of an action potential in what is happening in each stagearrow_forwardDescribe the role of sodium ions and sodium channels in generating an action potentialarrow_forward
- Give examples of graded potential, resting potential and action potential seen in neurons.arrow_forwardDiscuss the importance of the sodium-potassium pump in the establishment of resting potentials and the initiation of action potentials in neurons.arrow_forwardExplain the role of ion channels and sodium-potassium pumps in the establishment of the resting potential and the generation of an action potential.arrow_forward
- Draw a presynaptic and postsynaptic neuron at to demonstrate the release and acceptance of a neurotransmitter. Identify the following in your drawing: Ca2+, synaptic cleft, receptor, synaptic vessicle, SNARE, presynaptic neuron, postsynaptic neuronarrow_forwardGiven that graded potentials fade over distance, what type of synapse would be the most effective in starting or inhibiting an action potential?arrow_forwardState whether the channels listed would be open or closed at the corresponding numbered phases of the action potential graph. Phase on Graph Sodium Voltage Gated channels Potassium Voltage Gated channels 1 2 3 4arrow_forward
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