Question 1

Match the following concerning concentration differences across the plasma membrane.
-higher outside cell

Accepted Answer

A)  concentration of potassium
B)  concentration of sodium and chloride
C)  negatively charged proteins
D)  sodium/potassium pump
E)  plasma membrane is more permeable to this ion because of leak ion channelsF) A) and E)
G) C) and D)

Question 2

-The figure illustrates the Action Potential. What does "D" represent?

Accepted Answer

A)   repolarization
B)   depolarization
C)   local potential
D)   threshold
E)   afterpotentialF) A) and C)
G) C) and D) D

Question 3

Neurons arranged in a circular pathway form

Accepted Answer

A)   neuromotor junctions.
B)   temporal circuits.
C)   reverberating circuits.
D)   spatial pathways.E) All of the above
F) None of the above

Question 4

What ion is necessary for the release of neurotransmitter from synaptic vesicles?

Accepted Answer

A)   chloride
B)   sodium
C)   potassium
D)   calciumE) All of the above
F) B) and C) D

Question 5

If five action potentials arrive at the same synapse in very close succession, which of the following would occur?

Accepted Answer

A)   The direction of the action potential is reversed.
B)   Temporal summation occurs.
C)   Spatial summation occurs.
D)   Hyperpolarization occurs.
E)   Depolarization always occurs.F) A) and C)
G) C) and D)

Question 6

Which of the following situations occurs in electrically excitable cells?

Accepted Answer

A)   When Na+ ion channels open, K+ ion channels close.
B)   The sodium-potassium exchange pump moves sodium into the cell.
C)   Depolarization causes voltage-gated sodium ion channels to open.
D)   Ligand-gated sodium ion channels are opened by high extracellular calcium levels.
E)   Proteins tend to diffuse out of the cell.F) B) and E)
G) A) and D)

Question 7

Match the following concerning concentration differences across the plasma membrane.
-postassium ions

Accepted Answer

A)  concentration of potassium
B)  concentration of sodium and chloride
C)  negatively charged proteins
D)  sodium/potassium pump
E)  plasma membrane is more permeable to this ion because of leak ion channelsF) A) and B)
G) C) and D)

Question 8

Arrange the events of synaptic transmission in correct sequence. (1)  sodium ions diffuse into the cell and cause a local potential
(2)  neurotransmitter binds with receptor on postsynaptic cell
(3)  neurotransmitter diffuses across the synaptic cleft
(4)  membrane permeability to sodium ions on postsynaptic cell increases
(5)  action potential causes release of neurotransmitter

Accepted Answer

A)   5, 2, 3, 4, 1
B)   5, 2, 3, 1, 4
C)   5, 3, 4, 1, 2
D)   5, 4, 3, 2, 1
E)   5, 3, 2, 4, 1F) A) and B)
G) A) and E)

Question 9

The strength of a stimulus is communicated through

Accepted Answer

A)   changes in the magnitude of the action potential.
B)   the frequency of the action potentials.
C)   the length of time action potentials are produced.
D)   both the frequency and the length of time action potentials are produced.E) C) and D)
F) All of the above

Question 10

-The figure illustrates the Action Potential. What does "C" represent?

Accepted Answer

A)   repolarization
B)   depolarization
C)   local potential
D)   threshold
E)   afterpotentialF) A) and C)
G) C) and D)

Question 11

A local potential

Accepted Answer

A)   does not occur until threshold.
B)   transmits information from one cell to another.
C)   might be a depolarization event but cannot be a hyperpolarization event.
D)   increases or decreases in direct proportion to the stimulus strength.
E)   does not alter resting membrane potential.F) B) and C)
G) A) and C)

Question 12

A change in the resting membrane potential has the following characteristics (non-propagated, graded, can summate) . This type of change can

Accepted Answer

A)   be a local potential.
B)   be an action potential.
C)   be a consequence of an increase in the permeability to Na+.
D)   result in repolarization.
E)   be a local potential and a consequence of an increase in the permeability to Na+.F) All of the above
G) A) and C)

Question 13

Which of the following situations will lead to hyperpolarization?

Accepted Answer

A)   increase the permeability of the plasma membrane to Na+ ions
B)   decrease the permeability of the plasma membrane to K+ ions
C)   decrease the permeability of the plasma membrane to chloride ions
D)   any positive ion entering the cell
E)   None of these situations will lead to hyperpolarization.F) A) and E)
G) A) and C)

Question 14

Monamine oxidase inhibitors (MAO inhibitors)

Accepted Answer

A)   prevent synaptic transmission.
B)   enhance the breakdown of norepinephrine.
C)   enhance the binding of norepinephrine to its receptors.
D)   prevent the release of norepinephrine by the presynaptic terminal.
E)   have no effect on the action of norepinephrine.F) None of the above
G) C) and D)

Question 15

Action potentials at a chemical synapse

Accepted Answer

A)   travel from presynaptic terminal to postsynaptic membrane.
B)   travel from postsynaptic membrane to presynaptic terminal.
C)   travel back and forth from presynaptic terminal to postsynaptic membrane.
D)   travel from presynaptic terminal to presynaptic membrane.
E)   stop at the presynaptic terminal and are regenerated on the postsynaptic membrane.F) A) and D)
G) A) and E)

Question 16

-Identify structure "E" on the neuron.

Accepted Answer

A)   Schwann cell
B)   Node of Ranvier
C)   neuron cell body (soma) 
D)   dendrites
E)   axonF) C) and D)
G) D) and E)

Question 17

In an EPSP (excitatory postsynaptic potential) , there is a

Accepted Answer

A)   net movement of sodium ions out of the cells.
B)   net movement of chloride ions into the cells.
C)   decrease in action potential amplitude.
D)   local hyperpolarization.
E)   local depolarization.F) D) and E)
G) B) and E)

Question 18

The speed of an action potential depends upon

Accepted Answer

A)   whether an axon is myelinated or not myelinated.
B)   thickness of the myelin sheath.
C)   the diameter of the axon.
D)   All of the choices are correct.E) A) and D)
F) B) and D) D

Question 19

-Identify structure "A" on the neuron.

Accepted Answer

A)   Schwann cell
B)   Node of Ranvier
C)   neuron cell body (soma) 
D)   dendrites
E)   axonF) D) and E)
G) C) and D)

Question 20

-The figure illustrates the Action Potential. What does "E" represent?

Accepted Answer

A)   repolarization
B)   depolarization
C)   local potential
D)   threshold
E)   afterpotentialF) None of the above
G) A) and B)

Exam 11: Functional Organization of Nervous Tissue

Match the following concerning concentration differences across the plasma membrane. -higher outside cell

Correct Answer
verified

-The figure illustrates the Action Potential. What does "D" represent?

Correct Answer
verified
D

Neurons arranged in a circular pathway form

Correct Answer
verified

What ion is necessary for the release of neurotransmitter from synaptic vesicles?

Correct Answer
verified
D

If five action potentials arrive at the same synapse in very close succession, which of the following would occur?

Correct Answer
verified

Which of the following situations occurs in electrically excitable cells?

Correct Answer
verified

Match the following concerning concentration differences across the plasma membrane. -postassium ions

Correct Answer
verified

Correct Answer
verified

The strength of a stimulus is communicated through

Correct Answer
verified

-The figure illustrates the Action Potential. What does "C" represent?

Correct Answer
verified

A local potential

Correct Answer
verified

A change in the resting membrane potential has the following characteristics (non-propagated, graded, can summate) . This type of change can

Correct Answer
verified

Which of the following situations will lead to hyperpolarization?

Correct Answer
verified

Monamine oxidase inhibitors (MAO inhibitors)

Correct Answer
verified

Action potentials at a chemical synapse

Correct Answer
verified

-Identify structure "E" on the neuron.

Correct Answer
verified

In an EPSP (excitatory postsynaptic potential) , there is a

Correct Answer
verified

The speed of an action potential depends upon

Correct Answer
verified
D

-Identify structure "A" on the neuron.

Correct Answer
verified

-The figure illustrates the Action Potential. What does "E" represent?

Correct Answer
verified

Exam 11: Functional Organization of Nervous Tissue

Match the following concerning concentration differences across the plasma membrane. -higher outside cell

Correct AnswerverifiedShow Answer

-The figure illustrates the Action Potential. What does "D" represent?

Correct AnswerverifiedD

Neurons arranged in a circular pathway form

Correct AnswerverifiedShow Answer

What ion is necessary for the release of neurotransmitter from synaptic vesicles?

Correct AnswerverifiedD

If five action potentials arrive at the same synapse in very close succession, which of the following would occur?

Correct AnswerverifiedShow Answer

Which of the following situations occurs in electrically excitable cells?

Correct AnswerverifiedShow Answer

Match the following concerning concentration differences across the plasma membrane. -postassium ions

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The strength of a stimulus is communicated through

Correct AnswerverifiedShow Answer

-The figure illustrates the Action Potential. What does "C" represent?

Correct AnswerverifiedShow Answer

A local potential

Correct AnswerverifiedShow Answer

A change in the resting membrane potential has the following characteristics (non-propagated, graded, can summate) . This type of change can

Correct AnswerverifiedShow Answer

Which of the following situations will lead to hyperpolarization?

Correct AnswerverifiedShow Answer

Monamine oxidase inhibitors (MAO inhibitors)

Correct AnswerverifiedShow Answer

Action potentials at a chemical synapse

Correct AnswerverifiedShow Answer

-Identify structure "E" on the neuron.

Correct AnswerverifiedShow Answer

In an EPSP (excitatory postsynaptic potential) , there is a

Correct AnswerverifiedShow Answer

The speed of an action potential depends upon

Correct AnswerverifiedD

-Identify structure "A" on the neuron.

Correct AnswerverifiedShow Answer

-The figure illustrates the Action Potential. What does "E" represent?

Correct AnswerverifiedShow Answer

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D

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D

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D

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