question

The common structures or regions that form a neuron include the

answer

All of the above are correct.

question

The ________ is comprised of the brain and spinal cord.

answer

Central nervous system

question

Movement of the axon membrane potential from -90 mV to -80 mV would be termed a(n)

answer

Depolarization

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The ________ are important for the process of myelination of nerve axon membranes in brain.

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Oligodendrocytes

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Which of the following events restores the membrane potential from the peak of the action potential back to the resting level?

answer

Potassium ions move out of the cell

question

Which of the following was suggested as an advantage associated with myelination?

answer

Myelin prevents cross-talk between adjacent neurons

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The physical gap between two nerve cells across which messages are transmitted is the

answer

synapse

question

The membrane voltage level at which an action potential is triggered is termed the

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threshold of excitation

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Which of the following is true of receptors?

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Neurotransmitters bind to and activate receptors to exert their effects

question

Match the correct PSP effect with each ion channel action

answer

Entry of a negative ion; hyperpolarization

question

________ is made up of thirteen filaments arranged around a hollow core and is involved in axoplasmic transport.

answer

A microtubule

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Neurotransmitter molecules are secreted from a(n) ________ in response to the arrival of an action potential.

answer

axon terminal

question

The process which terminates the postsynaptic potentials induced by acetylcholine is

answer

enzymatic degradation via AChE

question

________ neurons gather information from the environment related to light, odors, and bodily contact with objects.

answer

Sensory

question

Which of the following is true of ion distribution across the axon membrane?

answer

Sodium ions are concentrated outside the axon membrane

question

A synapse can involve a junction between an axon terminal and a(n) ________.

answer

A, B, and C are correct.

question

________ is made up of thirteen filaments arranged around a hollow core and is involved in axoplasmic transport.

answer

A microtubule

question

Movement of the axon membrane potential from -90 mV to -80 mV would be termed a(n)

answer

Depolarization

question

The process which terminates the postsynaptic potentials induced by acetylcholine is

answer

Enzymatic degradation via AChE.

question

The physical gap between two nerve cells across which messages are transmitted is the

answer

Synapse

question

The portion of a neuron that carries a signal TOWARD the cell body is the

answer

Dendrite

question

Which of the following was suggested as an advantage associated with myelination?

answer

Myelin prevents cross-talk between adjacent neurons

question

Which of the following is true of neurotransmitter function?

answer

Neurotransmitters open ion channels in the postsynaptic membrane

question

Which of the following events restores the membrane potential from the peak of the action potential back to the resting level?

answer

Potassium ions move out of the cell

question

________ neurons function to contract muscles.

answer

Motor

question

Which of the following will produce an EPSP?

answer

Opening a sodium channel

question

The ________ is comprised of the nervous system outside of the brain and spinal cord.

answer

Peripheral nervous system

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Which of the following is NOT a function of glial cells?

answer

The conduction of action potentials

question

An electrical charge applied to an axon that moves the membrane potential from -70 mV to -45 mV will result in a(n)

answer

action potential

question

The Membrane of a nerve cell is comprised of

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A double layer of lipid molecules

question

Ions enter and leave the membrane of a myelinated axon at the

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nodes of Ranvier

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Which of the following is true of an action potential?

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The Sodium channels are opened at a lower voltage than are potassium channels

question

A key advantage of saltatory conduction is that

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Mywlin speeds up the velocity at which an axon can conduct an action potential

question

_____ Neurons function to contract muscles

answer

Motor

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Which of the following is true of ion distribution across the axon membrane

answer

Sodium ions are concentrated OUTSIDE the axon membrane

question

Neuronal signals are carried across the synapse by

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The secretion of transmitter molecules into the synapse

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Macroelectrodes implanted into human brain are most commonly used

answer

To locate spiking brain tissue in epileptic patients

question

The Temporal resolution of fMRI is limited by

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Sluggish nature of blood flow

question

The spatial resolution of EEG is limited by

answer

Conductivity issues and the inverse problem

question

An experimenter wishes to determine the effect of radiofrequency lesion placed in the lateral hypothalamus on emotional behavior in the rat. In order to be able to attribute any changes in emotional behavior to the lesion, this experiment will require a(n)

answer

Sham-lesion control group

question

The key rationale for lesion studies is that

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The Change in behavior that follows a brain lesion can give important clues about a function of an ablated brain area

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Study of the function of the living human brain is difficult because

answer

All of the above are correct

question

On of the oldest methods used in neuroscience to study brain function is

answer

Experimental ablation (Lesions)

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A key advantage of _____ lesions is that they affect only neural cell bodies and do not damage axons passing through the region

answer

Excitotoxic

question

_____Measures changes in blood oxygenation in the brain

answer

fMRI

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