11. Nervous Tissue and Nervous System
Change in Membrane Potential
11. Nervous Tissue and Nervous System
Change in Membrane Potential
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- Multiple Choice
A neuron's membrane potential goes from -90 mV to -10 mV. Which of the following terms describes this change?
1263views49rank - Multiple ChoiceWhich of the following electrical events occurs when a certain threshold is reached?1254views1rank
- Multiple ChoiceWhich of the following is characteristic of an action potential?1470views1rank
- Multiple ChoiceAn action potential is a phenomenon that either happens completely or doesn't happen at all.1684views1rank
- Textbook Question
The anatomical region of a multipolar neuron where the AP is initiated is the
a. Soma
b. Dendrites
c. Axon's initial segment
d. Axon terminals
798views1rank - Textbook Question
Since all APs generated by a given nerve fiber have the same magnitude, how does the CNS 'know' whether a stimulus is strong or weak?
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What is the polarized membrane state? How is it maintained? (Note the relative roles of both passive and active mechanisms.)
782views1rank - Textbook Question
Describe the events that must occur to generate an AP. Relate the sequence of changes in permeability to changes in the ion channels, and explain why the AP is an all-or-none phenomenon.
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