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The cellular unit of the nervous system is the neuron. What is the major function of this cell type.
Transmitting messages from one place to another.
The supporting cells, or neuroglia, have numerous functions
Myelination,macrophages, protection, anchoring neuron in place.
Describe how the Schwann cells form the myelin sheath and the neurilemma encasing the nerve processes.
Wraps around axon without crushing it. (Jellyroll style)
Mechanism that restores the resting membrane voltage and intracellular ionic concentrations
Sodium potassium pump
Would a substance that decreases membrane permeability to sodium increase or decrease the probability of generating a nerve impulse?
Why don't the terms depolarization & action potential mean the same thing?
Depolarization is at sub threshold amount, small change in charge. Action potential is at full threshold, large change in charge.
Which of the following structures are NOT a part of the brain stem?
Cerebral Hemispheres, Cerebellum
Why would trama to the base of the brain be dangerous.
Injury to the Medulla will cause problem with heart rate and breathing.
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