Nerves that contain mostly afferent fibers are called:

Nerves that contain mostly afferent fibers are called:

a.
sensory nerves
c.
mixed nerves
b.
motor nerves
d.
Schwann nerves





Answer: A

A multipolar neuron contains:

A multipolar neuron contains:

a.
multiple extensions from the cell body
c.
only one extension from the cell body
b.
exactly two extensions from the cell body
d.
none of the above



Answer: A

Dendrites conduct impulses:

Dendrites conduct impulses:

a.
toward cell bodies
c.
within cell bodies
b.
away from cell bodies
d.
none of the above



Answer: A

Axons and dendrites are classified as:

Axons and dendrites are classified as:

a.
the nerve cell body
c.
both a and b
b.
nerve fibers
d.
none of the above



Answer: B

Which of the following antidepressants acts by blocking the action of monoamine oxidase (MAO)?

Which of the following antidepressants acts by blocking the action of monoamine oxidase (MAO)?

a.
phenelzine
c.
amitriptyline
b.
imipramine
d.
cocaine



Answer: A

Which of the following neurotransmitters is not associated with the states of depression and mania?

Which of the following neurotransmitters is not associated with the states of depression and mania?

a.
serotonin
c.
norepinephrine
b.
enkephalins
d.
dopamine

Answer: B

A lack of this/these neurotransmitter(s) in the basal ganglia is/are associated with Parkinson's disease.

A lack of this/these neurotransmitter(s) in the basal ganglia is/are associated with Parkinson's disease.

a.
norepinephrine
c.
dopamine
b.
endorphins
d.
enkephalins




Answer: C

Severe depression can be caused by a deficit in certain brain synapses of:

Severe depression can be caused by a deficit in certain brain synapses of:

a.
acetylcholine
c.
amino acids
b.
amines
d.
neuropeptides




Answer: D

The neurotransmitters in the brain that affect learning, motor control, and emotions are:

The neurotransmitters in the brain that affect learning, motor control, and emotions are:

a.
acetylcholine
c.
amino acids
b.
amines
d.
neuropeptides

Answer: C

The main chemical classes of neurotransmitters include all the following except:

The main chemical classes of neurotransmitters include all the following except:

a.
acetylcholine
c.
amines
b.
norepinephrine
d.
neuropeptides




Answer: B

Neurotransmitters are released in a synapse and bind to:

Neurotransmitters are released in a synapse and bind to:

a.
presynaptic terminals
c.
the base of the axon
b.
the synaptic cleft
d.
receptors on the postsynaptic terminal



Answer: D

Serotonin is an example of a(n):

Serotonin is an example of a(n):

a.
amino acid neurotransmitter
c.
acetylcholine derivative
b.
amine neurotransmitter
d.
neuropeptide neurotransmitter



Answer: B

Which of the following is not one of the main chemical classes of neurotransmitters?

Which of the following is not one of the main chemical classes of neurotransmitters?

a.
triglycerides
c.
amino acids
b.
amines
d.
neuropeptides

Answer: A

There are approximately different neurotransmitters in the brain and spinal cord.

There are approximately different neurotransmitters in the brain and spinal cord.

a.
2
c.
20
b.
10
d.
30




Answer: D

Which of the following is true of spatial summation?

Which of the following is true of spatial summation?

a.
simultaneous stimulation of more than one postsynaptic neuron occurs
b.
impulses are fired in a rapid succession by the same neuron
c.
neurotransmitters released simultaneously from several presynaptic knobs converge on one postsynaptic neuron
d.
speed of impulse transmission is increased when several neurotransmitters are released

Answer: C

In order for a neurotransmitter to produce an inhibitory postsynaptic potential, which of the following channels must open?

In order for a neurotransmitter to produce an inhibitory postsynaptic potential, which of the following channels must open?

a.
sodium and potassium channels
c.
sodium and chloride channels
b.
potassium and/or chloride channels
d.
only the sodium channels



Answer: B

When current leaps across an insulating myelin sheath from node to node, the type of impulse conduction is called:

When current leaps across an insulating myelin sheath from node to node, the type of impulse conduction is called:

a.
repolarization
c.
saltatory conduction
b.
refraction
d.
diffusion




Answer: C

Excitatory neurotransmitters are most likely to:

Excitatory neurotransmitters are most likely to:

a.
increase the speed of impulse conduction
c.
initiate an action potential
b.
make the cell membrane impermeable
d.
make the resting potential more negative





Answer: C

When an impulse reaches a synapse:

When an impulse reaches a synapse:

a.
two nerve fibers come in direct contact
c.
an electrical spark will jump the gap
b.
impulses will pass in either direction
d.
chemical transmitters are released




Answer: D

A synaptic knob would be located on a(n):

A synaptic knob would be located on a(n):

a.
cell body
c.
dendrite
b.
axon
d.
cell body, axon, or dendrite



Answer: B