1
A&P 1 Exam 3 UTA Questions with Correct
Answers | Updated (100% Correct Answers)
Which ion channel opens or closes in response to a change in
membrane potential? Answer: voltage- gated
What statement about action potentials is not true? Answer:
threshold is at about -30mv
A signal to cause your muscle to contract, pulling your hand away
from a hot object, would travel along Answer: somatic nerves
Select the division of the nervous system that allows you to know
that coffee is brewing in another room. Answer: sensory
A major function of the nervous system is communication that
allows our bodies to maintain homeostasis. In many cases reflexes
will occur without our awareness. Which function of the nervous
system is bypassed in this case? Answer: none all functions occur in
reflexes
When processing data to answer this multiple-choice question, you
are utilizing the _______ of the nervous system. Answer: integrative
function
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,2
A scientist discovers that a neuron does not have adequate stores
of neurotransmitter. What part of the neuron is he observing?
Answer: the synaptic end bulbs
Each part of a neuron carries out a specific function, just as different
types of neurons are responsible for specific actions. In the
following choices, which paring of neuron structure is paired with a
type of neuron that carries out a similar function? Answer: dendrites
and afferent neurons
There is a lower than normal level of CSF being formed. Using your
knowledge of the functions of each of the types glial cells, you
surmise that the _______ are malfunctioning. Answer: ependymal
cells
true or false: unlike neuroglia, neurons have an axon Answer: true
If the myelin serves to insulate an axon, decreasing the loss of
electrical signal and increasing speed of conduction, then which of
the following statements accurately predicts where myelin will have
the largest effect? Answer: neurons with long axons that relay
critical information
Regrowth of neurons in injured areas of the central nervous system
does not generally occur because Answer: astrocytes multiply
rapidly, blocking potential regrowth of a neuron
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, 3
true or false: plasticity involves changes in synaptic strength or
number while regeneration involves repair Answer: true
A cell at rest will be more likely to lose K+ than gain Na+ because
the membrane has Answer: more K+ leak channels compared to
Na+ channels
Which of the following choices would result in the greatest flow of
ions across the membrane? Answer: a large membrane potential
Ions cross the membrane through channels. What factors will affect
the movement of the ions? Answer: chemical and electrical gradient
Movement of ions through channels occurs as a result of gradients.
If left alone, these gradients would eventually run down (i.e., reach
equilibrium). How do active transporters (pumps) like the Na+/K+
ATPase maintain the gradients? Answer: they pump ions across the
membrane maintaining both electrical and concentration gradients
Graded potentials exhibit a number of characteristics including
Answer: having depolarized or hyper-polarizing potentials, typically
being found in cell bodies or dendrites, being generated by ligand
or mechanically gated ions
How can one tell if action potentials are generated by a threshold
or suprathreshold stimuli Answer: the suprathreshold stimulus will
create a higher frequency of action potentials
© 2025 All rights reserved
A&P 1 Exam 3 UTA Questions with Correct
Answers | Updated (100% Correct Answers)
Which ion channel opens or closes in response to a change in
membrane potential? Answer: voltage- gated
What statement about action potentials is not true? Answer:
threshold is at about -30mv
A signal to cause your muscle to contract, pulling your hand away
from a hot object, would travel along Answer: somatic nerves
Select the division of the nervous system that allows you to know
that coffee is brewing in another room. Answer: sensory
A major function of the nervous system is communication that
allows our bodies to maintain homeostasis. In many cases reflexes
will occur without our awareness. Which function of the nervous
system is bypassed in this case? Answer: none all functions occur in
reflexes
When processing data to answer this multiple-choice question, you
are utilizing the _______ of the nervous system. Answer: integrative
function
© 2025 All rights reserved
,2
A scientist discovers that a neuron does not have adequate stores
of neurotransmitter. What part of the neuron is he observing?
Answer: the synaptic end bulbs
Each part of a neuron carries out a specific function, just as different
types of neurons are responsible for specific actions. In the
following choices, which paring of neuron structure is paired with a
type of neuron that carries out a similar function? Answer: dendrites
and afferent neurons
There is a lower than normal level of CSF being formed. Using your
knowledge of the functions of each of the types glial cells, you
surmise that the _______ are malfunctioning. Answer: ependymal
cells
true or false: unlike neuroglia, neurons have an axon Answer: true
If the myelin serves to insulate an axon, decreasing the loss of
electrical signal and increasing speed of conduction, then which of
the following statements accurately predicts where myelin will have
the largest effect? Answer: neurons with long axons that relay
critical information
Regrowth of neurons in injured areas of the central nervous system
does not generally occur because Answer: astrocytes multiply
rapidly, blocking potential regrowth of a neuron
© 2025 All rights reserved
, 3
true or false: plasticity involves changes in synaptic strength or
number while regeneration involves repair Answer: true
A cell at rest will be more likely to lose K+ than gain Na+ because
the membrane has Answer: more K+ leak channels compared to
Na+ channels
Which of the following choices would result in the greatest flow of
ions across the membrane? Answer: a large membrane potential
Ions cross the membrane through channels. What factors will affect
the movement of the ions? Answer: chemical and electrical gradient
Movement of ions through channels occurs as a result of gradients.
If left alone, these gradients would eventually run down (i.e., reach
equilibrium). How do active transporters (pumps) like the Na+/K+
ATPase maintain the gradients? Answer: they pump ions across the
membrane maintaining both electrical and concentration gradients
Graded potentials exhibit a number of characteristics including
Answer: having depolarized or hyper-polarizing potentials, typically
being found in cell bodies or dendrites, being generated by ligand
or mechanically gated ions
How can one tell if action potentials are generated by a threshold
or suprathreshold stimuli Answer: the suprathreshold stimulus will
create a higher frequency of action potentials
© 2025 All rights reserved
