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KIMVELA7-13

QuestionAnswer
Neurons are the only living cells that maintain a difference in the concentration of ions across their membranes. False
A membrane that exhibits a membrane potential is said to be polarized
In depolarization the membrane potential moves toward zero, whereas in hyperpolarization the membrane potential moves away from zero. true
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 speed of a nerve impulse depends on the neuron’s resting potential. false
Whether an impulse is continued through the neuron depends on the magnitude of the voltage in the axon hillock. true
The difference in electrical charge between the inside and outside of a membrane is called the membrane potential. true
In a myelinated fiber, the action potential jumps from one node of Ranvier to the next. true
The brief period during which a local area of an axon's membrane resists re-stimulation is called the __________ period. refractory
The magnitude of the action potential peaks when the sodium channels close. true
Created by: kimvela
 

 



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