Exam One Study Guide

Last update by Madison on 09/16/2013
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2.

Dendrites are branching extensions of

A)

neurotransmitters.

B)

endorphins.

C)

neurons.

D)

stem cells.

Answer:
C) neurons

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    3.

    The longest part of a neuron carrying messages to a leg muscle is likely to be the

    A)

    dendrite.

    B)

    axon.

    C)

    cell body.

    D)

    synapse.

    B) axon
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    4.

    In transmitting sensory information to the brain, an electrical signal travels from the ________ of a single neuron.

    A)

    dendrites to the axon to the cell body

    B)

    axon to the cell body to the dendrites

    C)

    dendrites to the cell body to the axon

    D)

    axon to the dendrites to the cell body

    C) dendrites to the cell body to the axon
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    5.

    The speed at which a neural impulse travels is increased when the axon is encased by a(n)

    A)

    association area.

    B)

    myelin sheath.

    C)

    stem cell.

    D)

    endocrine gland.

    B) myelin sheath
  • Madison Brochin

    6.

    Increasing excitatory signals above the threshold for neural activation will not affect the intensity of an action potential. This indicates that a neuron's reaction is

    A)

    inhibited by the myelin sheath.

    B)

    delayed by a simple reflex.

    C)

    an all-or-none response.

    D)

    dependent on neurotransmitter molecules.

    C) an all-or-none response
  • Madison Brochin

    7.

    A slap on the back is more painful than a pat on the back because a slap triggers

    A)

    the release of endorphins.

    B)

    more intense neural impulses.

    C)

    the release of serotonin.

    D)

    more neurons to fire, and to fire more often.

    D) more neurons to fire, and to fire more often.
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    8.

    The chemical messengers released into the spatial junctions between neurons are called

    A)

    hormones.

    B)

    neurotransmitters.

    C)

    synapses.

    D)

    genes.

    B) neurotransmitters.
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    9.

    Reuptake refers to the

    A)

    movement of neurotransmitter molecules across a synaptic gap.

    B)

    release of hormones into the bloodstream.

    C)

    inflow of myelin through an axon membrane.

    D)

    reabsorption of excess neurotransmitter molecules by a sending neuron.

    D) reabsorption of excess neurotransmitter molecules by a sending neuron.
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    10.

    Opiate drugs occupy the same receptor sites as

    A)

    serotonin.

    B)

    endorphins.

    C)

    dopamine.

    D)

    epinephrine.

    B) endorphins
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    11.

    José has just played a long, bruising football game but feels little fatigue or discomfort. His lack of pain is most likely caused by the release of

    A)

    curare.

    B)

    dopamine.

    C)

    acetylcholine.

    D)

    endorphins.

    D) endorphins
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    12.

    An undersupply of serotonin is most closely linked to

    A)

    Alzheimer's disease.

    B)

    schizophrenia.

    C)

    Parkinson's disease.

    D)

    depression.

    d) depression
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    13.

    The effect of a drug that is an antagonist is to

    A)

    cause the brain to stop producing certain neurotransmitters.

    B)

    mimic a particular neurotransmitter.

    C)

    block a particular neurotransmitter.

    D)

    disrupt a neuron's all-or-none firing pattern.

    C) block a particular neurotransmitter