The Neuron and the Action Potential
13 important questions on The Neuron and the Action Potential
What are chemically passed between neurons?
What do ion pumps and ion channels control?
Where are anions located in a neuron?
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What does the movement of the potassium ions when the neuron is at rest show?
What is the equilibrium potential of K+? What does this show?
This shows that inside of the cell is still negative compared to the outside when K+ reaches equilibrium (at rest, a neuron has more positive ions outside the cell than inside the cell)
What does the sodium potassium pump cause? How?
What does the imbalance caused by the Na/K pump allow in terms of currents and impulses?
Where are action potentials generated?
What order does hyperpolization, depolarization and repolarization come in?
2. Depolarization
3. Repolarization
4. Hyperpolarization
5. Resting
What two effects can the neurotransmitter have?
What is the function of dendrites?
How are glial cells different from neurons?
What are the five major types of Glial cells and their functions?
Astrocyte - star shaped; provides structural support to neurons in the central nervous system and transports substances between neurons and blood vessels.
Microglial cell - defensive function; along with schwann cells they play a part in repairing damage to the peripheral nervous system
Oligodendroglial cell - asymmetrical; forms myelin around CNS axons in the brain and spinal cord
Schwann cell - asymmetrical; wraps around peripheral nerves to form myelin
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