BI 332 Human Physiology Lab: Practice
Quizzes 1-10 | 2026 Guide
1. Somatic motor neurons: C. Somatic motor neurons
a. transmit proprioceptive (sensory) information can be found in either
b. are usually bipolar in shape cranial or spinal nerves.
c. can be found in cranial nerves The ditterence is that cra-
nial nerves send neu-
rons to the face, head,
neck and internal thora-
coabdominal organs, and
spinal nerves serve struc-
tures below the neck. As a
group, these nerves con-
tain axons of sensory (so-
matic and visceral) neu-
rons, as well as axons
of motor (autonomic and
somatic) neurons. Somat-
ic motor neurons serve
skeletal muscles - you have
skeletal muscles in your
face served by the facial
nerve.
Somatic motor neurons
do not transmit proprio-
ceptive information - only
somatic sensory neurons
do.
Somatic motor neurons
are multipolar in shape -
bipolar neurons are re-
stricted to the eyes, ears
and nose.
, BI 332 Human Physiology Lab: Practice
Quizzes 1-10 | 2026 Guide
2. dorsal root ganglion contains: b. sensory neurons only
a. motor neuron only
b. sensory neuron only
c. sensory and motor neurons
3. Which of the following most accurately describes what a. At rest a neuron is more
is happening in a resting neuron? permeable to potassium
a. During rest, the membrane is more permeable to than sodium because it
potassium than it is to sodium. has more leak channels
b. During rest, gated channels are open. for potassium than sodi-
c. During rest, no ions are moving across the cell mem- um. Ions are crossing a
brane. resting neuron (one that
d. During rest, the membrane is hyperpolarized. is neither sending nor re-
e. During rest, all ions are moving across the cell mem- ceiving a signal) both pas-
brane passively. sively through leak chan-
nels and actively through
pumps. This separation of
charges on either side of
the membrane and the
movement of ions across
the membrane causes the
membrane to be polar-
ized at -70 mV (this num-
ber varies for ditterent
cells). When the mem-
brane hyperpolarizes, the
membrane potential be-
comes more negative than
resting levels (ie: -90 mV,
-100 mV etc).
Gated channels open
, BI 332 Human Physiology Lab: Practice
Quizzes 1-10 | 2026 Guide
when neurons are sending
and receiving signals.
4. In the peripheral nervous system (PNS), cell bodies of d. subcortical gray matter
unipolar neurons associated with spinal nerves clus-
ter together in structures called "dorsal root ganglia".
Which of the following CNS structures is most similar
to ganglia?
a. white matter
b. cranial nerves
c. spinal nerves
d. subcortical gray matter
5. Which of the following will, for sure, without question, e. The information given is
stimulate an action potential in a postsynaptic neu- not suflcient to answer the
ron? question.
a. Three IPSPs and two EPSPs occurring at once, near it is impossible to know
one another, near the trigger zone if the postsynaptic neu-
b. Seven EPSPs, occurring repeatedly near the trigger ron generated an action
zone potential without seeing
c. Three rapidly occurring EPSPs at the same spot, far a measure of its mem-
from the trigger zone brane potential at the trig-
d. Four IPSPs occurring at once near the trigger zone ger zone.
e. The information given is not sufficient to answer the
question.
6. During presynaptic inhibition, what type of channels d. Chemically gated Cl-
open in response to GABA? channels
a. Chemically gated Ca++ channels
b. Voltage gated Ca++ channels
c. Voltage gated Cl- channels
d. Chemically gated Cl- channels
Quizzes 1-10 | 2026 Guide
1. Somatic motor neurons: C. Somatic motor neurons
a. transmit proprioceptive (sensory) information can be found in either
b. are usually bipolar in shape cranial or spinal nerves.
c. can be found in cranial nerves The ditterence is that cra-
nial nerves send neu-
rons to the face, head,
neck and internal thora-
coabdominal organs, and
spinal nerves serve struc-
tures below the neck. As a
group, these nerves con-
tain axons of sensory (so-
matic and visceral) neu-
rons, as well as axons
of motor (autonomic and
somatic) neurons. Somat-
ic motor neurons serve
skeletal muscles - you have
skeletal muscles in your
face served by the facial
nerve.
Somatic motor neurons
do not transmit proprio-
ceptive information - only
somatic sensory neurons
do.
Somatic motor neurons
are multipolar in shape -
bipolar neurons are re-
stricted to the eyes, ears
and nose.
, BI 332 Human Physiology Lab: Practice
Quizzes 1-10 | 2026 Guide
2. dorsal root ganglion contains: b. sensory neurons only
a. motor neuron only
b. sensory neuron only
c. sensory and motor neurons
3. Which of the following most accurately describes what a. At rest a neuron is more
is happening in a resting neuron? permeable to potassium
a. During rest, the membrane is more permeable to than sodium because it
potassium than it is to sodium. has more leak channels
b. During rest, gated channels are open. for potassium than sodi-
c. During rest, no ions are moving across the cell mem- um. Ions are crossing a
brane. resting neuron (one that
d. During rest, the membrane is hyperpolarized. is neither sending nor re-
e. During rest, all ions are moving across the cell mem- ceiving a signal) both pas-
brane passively. sively through leak chan-
nels and actively through
pumps. This separation of
charges on either side of
the membrane and the
movement of ions across
the membrane causes the
membrane to be polar-
ized at -70 mV (this num-
ber varies for ditterent
cells). When the mem-
brane hyperpolarizes, the
membrane potential be-
comes more negative than
resting levels (ie: -90 mV,
-100 mV etc).
Gated channels open
, BI 332 Human Physiology Lab: Practice
Quizzes 1-10 | 2026 Guide
when neurons are sending
and receiving signals.
4. In the peripheral nervous system (PNS), cell bodies of d. subcortical gray matter
unipolar neurons associated with spinal nerves clus-
ter together in structures called "dorsal root ganglia".
Which of the following CNS structures is most similar
to ganglia?
a. white matter
b. cranial nerves
c. spinal nerves
d. subcortical gray matter
5. Which of the following will, for sure, without question, e. The information given is
stimulate an action potential in a postsynaptic neu- not suflcient to answer the
ron? question.
a. Three IPSPs and two EPSPs occurring at once, near it is impossible to know
one another, near the trigger zone if the postsynaptic neu-
b. Seven EPSPs, occurring repeatedly near the trigger ron generated an action
zone potential without seeing
c. Three rapidly occurring EPSPs at the same spot, far a measure of its mem-
from the trigger zone brane potential at the trig-
d. Four IPSPs occurring at once near the trigger zone ger zone.
e. The information given is not sufficient to answer the
question.
6. During presynaptic inhibition, what type of channels d. Chemically gated Cl-
open in response to GABA? channels
a. Chemically gated Ca++ channels
b. Voltage gated Ca++ channels
c. Voltage gated Cl- channels
d. Chemically gated Cl- channels
