Vander's Human Physiology Exam Practice
Questions with Correct Answers and Explanations
Which of the following statements concerning a neuron is NOT correct?
A. It is the basic unit of the nervous system
B. It is a glial cell
C. It generates electrical signals
D. It may communicate with other neurons via chemical signals - Answer B. It is a glial cell
Pg. 136
Which of the following statements concerning axonal transport is NOT correct?
A. Uses microtubles
B. Uses kinesin and dynein
C. Is capable of bidirectional traffic (retrograde & anterograde
D. Transports transmitters from the cell body to the synaptic region
E. It occurs in motor (efferent) neurons only - Answer E. It occurs in motor (efferent neurons only
Pg. 137 Fig 6-3
Which of the following statements concerning glial cells is NOT correct?
A. Are less abundant than neurons
B. Respond to injury
C. Help myelinate CNS axons
D. Help regulate neuronal environment - Answer A. Are less abundant than neurons
, Which of the following statements concerning equilibrium potential of a given ion across a membrane is
correct?
A. Is a function of the concentration of that ion on the extracellular side of the membrane
B. Is a function of the concentration of that ion on the intracellular side of the membrane
C. Is the potential at which there is no movement of that ion across the membrane due to
electrochemical forces
D. Is the potential at which there is equal movement of that ion into and out of the cell across the
membrane due to electrochemical forces - Answer D. Is the potential at which there is equal movement
of that ion into and out of the cell across the membrane due to electrochemical forces
Resting membrane potential is generated
A. By the movement of K ions down their electrical gradient through leak channels
B. By the opening of voltage-gated sodium channels
C. By the action of the Na+/K+ ATPase pump which transports positive ions in unequal numbers
D. By the movement of Na ions against their concentration gradient through leaked channels - Answer C.
By the action of the Na+/K+ ATPase pump which transports positive ions in unequal numbers
During an action potential
A. Ligand-gated K channel in the membrane open in response to depolarization
B. Voltage-gated sodium channels in the membrane open in response to neurotransmitter released from
adjacent membrane
C. The increase in sodium permeability in the membrane is and ex of positive feedback
D. The movement of Na into the neuron causes the cell to hyperpolarized - Answer C. The increase in
sodium permeability in the membrane is an example of positive feedback.
Pg 149-151
Threshold stimuli are those that are strong enough to
Questions with Correct Answers and Explanations
Which of the following statements concerning a neuron is NOT correct?
A. It is the basic unit of the nervous system
B. It is a glial cell
C. It generates electrical signals
D. It may communicate with other neurons via chemical signals - Answer B. It is a glial cell
Pg. 136
Which of the following statements concerning axonal transport is NOT correct?
A. Uses microtubles
B. Uses kinesin and dynein
C. Is capable of bidirectional traffic (retrograde & anterograde
D. Transports transmitters from the cell body to the synaptic region
E. It occurs in motor (efferent) neurons only - Answer E. It occurs in motor (efferent neurons only
Pg. 137 Fig 6-3
Which of the following statements concerning glial cells is NOT correct?
A. Are less abundant than neurons
B. Respond to injury
C. Help myelinate CNS axons
D. Help regulate neuronal environment - Answer A. Are less abundant than neurons
, Which of the following statements concerning equilibrium potential of a given ion across a membrane is
correct?
A. Is a function of the concentration of that ion on the extracellular side of the membrane
B. Is a function of the concentration of that ion on the intracellular side of the membrane
C. Is the potential at which there is no movement of that ion across the membrane due to
electrochemical forces
D. Is the potential at which there is equal movement of that ion into and out of the cell across the
membrane due to electrochemical forces - Answer D. Is the potential at which there is equal movement
of that ion into and out of the cell across the membrane due to electrochemical forces
Resting membrane potential is generated
A. By the movement of K ions down their electrical gradient through leak channels
B. By the opening of voltage-gated sodium channels
C. By the action of the Na+/K+ ATPase pump which transports positive ions in unequal numbers
D. By the movement of Na ions against their concentration gradient through leaked channels - Answer C.
By the action of the Na+/K+ ATPase pump which transports positive ions in unequal numbers
During an action potential
A. Ligand-gated K channel in the membrane open in response to depolarization
B. Voltage-gated sodium channels in the membrane open in response to neurotransmitter released from
adjacent membrane
C. The increase in sodium permeability in the membrane is and ex of positive feedback
D. The movement of Na into the neuron causes the cell to hyperpolarized - Answer C. The increase in
sodium permeability in the membrane is an example of positive feedback.
Pg 149-151
Threshold stimuli are those that are strong enough to
