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Questions and Answers
Why is myelin important? (Check all that apply)
Why is myelin important? (Check all that apply)
If the postsynaptic membrane potential reaches threshold level, an action potential will be produced.
If the postsynaptic membrane potential reaches threshold level, an action potential will be produced.
True
Why does depolarization occur?
Why does depolarization occur?
More Na+ diffuse into the cell than K+ diffuse out of it.
The resting membrane potential is negative due to which of the following?
The resting membrane potential is negative due to which of the following?
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What is(are) the fundamental physiological properties that enable nerve cells to communicate with other cells?
What is(are) the fundamental physiological properties that enable nerve cells to communicate with other cells?
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What is fast retrograde transport?
What is fast retrograde transport?
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Study Notes
Importance of Myelin
- Myelin speeds up signal conduction along nerve fibers.
- It assists in the regeneration of damaged nerve fibers.
- Myelin provides insulation for nerve fibers, preventing signal loss.
Action Potential Generation
- An action potential is generated when the postsynaptic membrane potential reaches a threshold level.
Depolarization Mechanism
- Depolarization occurs when more sodium ions (Na+) diffuse into the cell compared to potassium ions (K+) diffusing out.
Resting Membrane Potential
- The resting membrane potential is negative due to the distribution of ions across the cell membrane, primarily influenced by sodium and potassium ion concentration.
Retrograde Transport
- Fast retrograde transport is responsible for returning used synaptic vesicles and materials to the soma.
- This process informs the soma about conditions at the axon terminals, aiding in cellular communication and maintenance.
Communication Properties of Nerve Cells
- Nerve cells possess fundamental physiological properties that enable them to communicate effectively with other cells, such as excitability and conductivity.
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Description
Test your knowledge on nervous tissue with this Chapter 12 quiz. Explore essential concepts such as myelin's role, action potentials, and depolarization mechanisms. Perfect for reinforcing what you've learned in the textbook.
