Marijuana is used medically to enhance memory.

True  
*False 

A drug that blocks the effects of a neurotransmitter is an agonist.

True  
*False  

A drug that blocks the effects of a neurotransmitter is an antagonist.

*True  
False 

Gases can be used as neurotransmitters.

*True  
False

Inhibitory synapses actively suppress excitatory responses.

*True  
False  

Graded potentials can be depolarizations or hyperpolarizations.

*True  
False

The amount of temporal summation depends on the rate of stimulation.

*True  
False

At synapses, the cell that receives the message is called the presynaptic neuron.

True  
*False

A reflex arc consists only of sensory neurons.

True  
*False 

Transmission of information between neurons occurs in the same way as transmission along the axon.

True  
*False 

A common drug to treat alcoholism that produces illness after consuming alcohol is:

    a.    COMT.
    b.    NMDA.
    c.    anandamide.
    *d.    Antabuse.

LSD and other hallucinogenic drugs probably exert their effects most directly on what part of the neuron?

    a.    the reuptake protein channels
    b.    the sodium-potassium pump
    c.    axons terminals
    *d.    the postsynaptic receptors

Opiate drugs bind to receptors in the brain for:

    a.    catecholamines.
    b.    indolamines.
    c.    monoamines.
    *d.    endorphins.

The key into a lock analogy best describes:

    *a.    a drug's affinity for a receptor.
    b.    breakdown at a receptor site.
    c.    a drug's efficacy.
    d.    a drug's reuptake.

A drug that blocks the effects of a neurotransmitter is a(n) ________; a drug that mimics or increases the effects is a(n) ________.

    *a.    antagonist; agonist
    b.    depressant; stimulant
    c.    neuromodulator; synergist
    d.    agonist; antagonist

What is the function of the enzyme acetylcholinesterase?

    *a.    It breaks acetylcholine down into components for recycling.
    b.    It blocks further release of the transmitter acetylcholine.
    c.    It synthesizes acetylcholine from the diet.
    d.    It increases the sensitivity of the postsynaptic cell to acetylcholine.

"Second messengers" carry their messages to:

    a.    the surrounding glia.
    b.    areas within the presynaptic cell.
    *c.    areas within the postsynaptic cell.
    d.    the presynaptic membrane.

The neurotransmitter GABA exerts ________ effects, and its effects are almost always ________.

    *a.    ionotropic; inhibitory
    b.    metabotropic; excitatory
    c.    ionotropic; excitatory
    d.    metabotropic; inhibitory

The release of neurotransmitter from the presynaptic terminal is most dependent on the influx of what ion?

    a.    chloride
    b.    sodium
    *c.    calcium
    d.    potassium

High concentrations of all neurotransmitters, except for NO, are stored in the:

    a.    cell body.
    *b.    presynaptic terminals.
    c.    postsynaptic terminals.
    d.    axon.