Which is true of an action potential?

The outside of the plasma membrane is negatively charged, and the inside is positively charged.

No impulse can be sent through a neuron:

during the absolute refractory period

Within the nervous system, coding for the strength of a stimulus is accomplished through:

the frequency of nerve impulses.

Which is true of a neuron with a resting potential?

The sodium pump has moved Na+ to the outside of the plasma membrane.

What mechanism quickly terminates the action of a neurotransmitter once it binds to its postsynaptic receptor?

Neurotransmitter molecules are metabolized into inactive compounds. Neurotransmitter molecules are transported into nearby glial cells. Neurotransmitter molecules are transported back into synaptic knobs.

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.

In a healthy adult, a well-placed tap on the knee will result in a:

stretch of the tendon, the quadriceps femoris, and thereby stimulation of the muscle spindles.

The knee jerk can be classified as a segmental reflex because:

impulses that mediate it enter and leave the same segment of the cord.

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wk14-Vidal Castaneda

WK14 study stack

Question	Answer
Which is true of an action potential?	The outside of the plasma membrane is negatively charged, and the inside is positively charged.
No impulse can be sent through a neuron:	during the absolute refractory period
Within the nervous system, coding for the strength of a stimulus is accomplished through:	the frequency of nerve impulses.
Which is true of a neuron with a resting potential?	The sodium pump has moved Na+ to the outside of the plasma membrane.
In a myelinated neuron, the impulse can travel under the myelin between nodes of Ranvier.	True
What mechanism quickly terminates the action of a neurotransmitter once it binds to its postsynaptic receptor?	Neurotransmitter molecules are metabolized into inactive compounds. Neurotransmitter molecules are transported into nearby glial cells. Neurotransmitter molecules are transported back into synaptic knobs.
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.
The magnitude of the action potential peaks when the sodium channels close.	True
In a healthy adult, a well-placed tap on the knee will result in a:	stretch of the tendon, the quadriceps femoris, and thereby stimulation of the muscle spindles.
If the dorsal root ganglia of the spinal nerve were destroyed, a person would lose _____ related to that pathway.	sensory perception
All of the following are examples of parasympathetic stimulation except:	increased heart rate.
The knee jerk can be classified as a segmental reflex because:	impulses that mediate it enter and leave the same segment of the cord.
Danielle has sustained an injury that has reduced her ability to complete simple tasks such as lifting a pencil, manipulating eating utensils, and brushing her hair. The injury has affected the _____ motor pathways _____ the central nervous system (CNS).	voluntary; outside

Created by: Vidal213

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