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Week 7 Quiz
Nervous System
Question | Answer |
---|---|
A synapse can occur only between an axon and: | another axon, a cell body, and a dendrite |
The difference between sodium and potassium in the generation of action potential is that: | sodium causes depolarization of the cell membrane, and potassium causes repolarization of the cell membrane. |
The magnitude of the action potential peaks when the sodium channels close. | True |
The sodium-potassium pump actively pumps three potassium ions out of the neuron and two sodium ions into the neuron. | false |
A membrane that exhibits a membrane potential is said to be | polarized |
The membrane potential maintained by a nonconducting neuron’s plasma membrane is called the _____ membrane potential. | resting |
The mechanisms that produce and maintain the resting membrane potential do so by producing a | slight excess of positive ions on the outer surface of the plasma membrane. |
A term commonly used as a synonym for action potential is | nerve impulse. |
Which chemicals allow neurons to communicate with one another? | neurotransmitters |
The autonomic nervous system is composed of | The sympathetic and parasympathetic nervous system |
A neuron that transmits a nerve impulse toward the central nervous system | sensory neuron |