LAB MANUAL:MCKINLEY'S ANATOMY & PHYSIOL
2nd Edition
ISBN: 9781260484991
Author: McKinley
Publisher: MCG
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Question
Chapter 12.8, Problem 24WDYL
Summary Introduction
To explain:
The propagation of action potential in the unmyelinated and myelinated axon.
Concept introduction:
The unequal distribution of positive and negative charge across the cell membrane results in membrane potential of a cell. When the membrane potential of an axon in a specific location rise and falls, it causes a series of electrical response or action potential. Action potential helps in the communication between cells.
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Explain how action potentials are conducted by an unmyelinated axon.
Describe the propagation of an action potential. Contrast this eventin myelinated and unmyelinated axons?
Describe the characteristics of action potentials and explain how they are conducted by unmyelinated and myelinated axons.
Chapter 12 Solutions
LAB MANUAL:MCKINLEY'S ANATOMY & PHYSIOL
Ch. 12.1 - Prob. 1WDYLCh. 12.1 - What are the two primary functional divisions of...Ch. 12.2 - Prob. 3WDYLCh. 12.2 - Prob. 4WDYLCh. 12.2 - Prob. 5WDYLCh. 12.2 - Prob. 6WDYLCh. 12.2 - Prob. 7WDYLCh. 12.2 - What are the three connective tissue wrappings in...Ch. 12.3 - Prob. 9WDYLCh. 12.4 - If a person has a brain tumor, is it more likely...
Ch. 12.4 - Prob. 11WDYLCh. 12.4 - Prob. 12WDYLCh. 12.4 - Prob. 13WDYLCh. 12.5 - Prob. 14WDYLCh. 12.5 - Prob. 15WDYLCh. 12.6 - Prob. 16WDYLCh. 12.6 - Prob. 17WDYLCh. 12.7 - Prob. 18WDYLCh. 12.7 - Prob. 19WDYLCh. 12.7 - Prob. 20WDYLCh. 12.8 - How are EPSP and IPSP graded potentials...Ch. 12.8 - Prob. 22WDYLCh. 12.8 - How does depolarization and repolarization occur...Ch. 12.8 - Prob. 24WDYLCh. 12.8 - Prob. 25WDYLCh. 12.9 - Prob. 26WDYLCh. 12.9 - Prob. 27WDYLCh. 12.9 - Prob. 28WDYLCh. 12.9 - Prob. 29WDYLCh. 12.10 - Prob. 30WDYLCh. 12.10 - Prob. 31WDYLCh. 12.11 - Prob. 32WDYLCh. 12.11 - Prob. 33WDYLCh. 12 - _____ 1. The cell body of a neuron does all of the...Ch. 12 - Prob. 2DYKBCh. 12 - Prob. 3DYKBCh. 12 - Prob. 4DYKBCh. 12 - Prob. 5DYKBCh. 12 - Prob. 6DYKBCh. 12 - _____ 7. An action potential is generated when...Ch. 12 - Prob. 8DYKBCh. 12 - Prob. 9DYKBCh. 12 - Prob. 10DYKBCh. 12 - What are the four structural types of neurons? How...Ch. 12 - Prob. 12DYKBCh. 12 - How does myelination differ between the CNS and...Ch. 12 - Describe the procedure by which a PNS axon may...Ch. 12 - Prob. 15DYKBCh. 12 - Prob. 16DYKBCh. 12 - Explain summation of EPSPs and IPSPs and the...Ch. 12 - Graph and explain the events associated with an...Ch. 12 - Prob. 19DYKBCh. 12 - Prob. 20DYKBCh. 12 - Prob. 1CALCh. 12 - Prob. 2CALCh. 12 - Prob. 3CALCh. 12 - Prob. 4CALCh. 12 - Sarah wants to call her new friend Julie and needs...Ch. 12 - Over a period of 6 to 9 months, Marianne began to...Ch. 12 - Prob. 2CSLCh. 12 - Prob. 3CSL
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- Define an action potential.arrow_forwardDraw and label an action potential, indicating the ion movements responsible for the rising phase and the falling phase.arrow_forwardAssume 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_forward
- Explain how an excitatory post-synaptic potential can lead to the generation of an action potential.arrow_forwardExplain why the strength of an action potential doesn’t decrease as it travels down an axon.arrow_forwardDescribe the steps including the roll of ion terminals in a neuronal action potentialarrow_forward
- If the middle of an axon were depolarized to threshold, in which direction could the action potential propagate?arrow_forward. “Facilitation in a neuronal pool” refers to .arrow_forwardDescribe how different post-synaptic potentials can be summated on a single neuron to determine if that neuron does or does not fire an action potentialarrow_forward
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