Question 1

Neurons arranged in a circular pathway form

Accepted Answer

A)  neuromotor junctions.
B)  temporal circuits.
C)  reverberating circuits.
D)  spatial pathways.E) A) and C)
F) A) and B)

Question 2

-The figure is a process figure of the chemical synapse.What does "C" represent?

Accepted Answer

A)  postsynaptic membrane
B)  synaptic cleft
C)  synaptic vesicle
D)  voltage-gated calcium channel
E)  presynaptic terminalF) C) and E)
G) B) and D)

Question 3

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

Accepted Answer

A)  chloride
B)  sodium
C)  potassium
D)  calciumE) A) and D)
F) B) and C)

Question 4

Match the term with the correct definition.
-depolarization

Accepted Answer

A)  a small change in the resting membrane potential confined to a small area
B)  a charge difference across the plasma membrane when the cell is in an unstimulated state
C)  a larger change in resting membrane potential that spreads over entire surface of a cell
D)  membrane becomes more positive when sodium ions diffuse into cell
E)  return to the resting membrane potentialF) A) and B)
G) A) and C)

Question 5

Which of the following is NOT true about astrocytes?

Accepted Answer

A)  They can wall off an injury site to prevent spread of inflammation.
B)  They can prevent toxic substances from entering brain tissue.
C)  They can release chemicals that promote formation of synapses.
D)  They can aid in the regeneration of injured neurons.E) B) and C)
F) B) and D)

Question 6

-Identify structure "E" on the neuron.

Accepted Answer

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

Question 7

When a neurotransmitter binds to its receptor and increases the permeability of the postsynaptic membrane to sodium ions,

Accepted Answer

A)  the membrane will be hyperpolarized.
B)  more chloride ions will also diffuse into the cell.
C)  an excitatory postsynaptic potential (EPSP) will result.
D)  the membrane will become impermeable to potassium ions.
E)  the sodium ions diffuse out of the cell.F) B) and E)
G) A) and E)

Question 8

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 D)
G) All of the above

Question 9

Synaptic vesicles contain neurotransmitters and are present in the

Accepted Answer

A)  dendrites.
B)  cell body.
C)  axolemma.
D)  presynaptic terminals.
E)  trigger zone.F) A) and E)
G) C) and E)

Question 10

Receptor molecules

Accepted Answer

A)  are nonspecific.
B)  are always lipids.
C)  attach to the synaptic cleft.
D)  determine whether a neurotransmitter will be excitatory or inhibitory.
E)  are not attached to ligand-gated channels.F) B) and C)
G) A) and E)

Question 11

Match the term with the correct definition.
-Local Potential

Accepted Answer

A)  a small change in the resting membrane potential confined to a small area
B)  a charge difference across the plasma membrane when the cell is in an unstimulated state
C)  a larger change in resting membrane potential that spreads over entire surface of a cell
D)  membrane becomes more positive when sodium ions diffuse into cell
E)  return to the resting membrane potentialF) B) and C)
G) A) and E)

Question 12

Which of the following events is NOT a characteristic of an action potential?

Accepted Answer

A)  The plasma membrane becomes highly permeable to sodium ions and depolarization results.
B)  As sodium ions enter,the inside of the plasma membrane becomes more negative.
C)  At the peak of depolarization,sodium channels begin to close and potassium channels open.
D)  In repolarization,potassium ions flow out of the cell.
E)  Action potentials occur according to the all-or-none principle.F) All of the above
G) C) and D)

Question 13

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) B) and D)

Question 14

Dendrites

Accepted Answer

A)  are the input part of the neuron.
B)  conduct action potentials away from the cell body.
C)  are generally long and unbranched.
D)  form synapses with the microglia.
E)  contain the trigger zone.F) B) and C)
G) B) and D)

Question 15

When repolarization of a neuron is complete,the

Accepted Answer

A)  neuron dies.
B)  neuron regenerates.
C)  cell no longer has a potential difference across its membrane.
D)  original polarity of the neuron is restored.
E)  neuron is no longer excitable.F) C) and D)
G) A) and B)

Exam 11: Functional Organization of Nervous Tissue

-Identify structure "E" on the neuron.

Correct Answer
verified

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

Correct Answer
verified

Synaptic vesicles contain neurotransmitters and are present in the

Correct Answer
verified

Dendrites

Correct Answer
verified

Match the term with the correct definition. -depolarization

Correct Answer
verified

When repolarization of a neuron is complete,the

Correct Answer
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-The figure is a process figure of the chemical synapse.What does "C" represent?

Correct Answer
verified

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

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

Correct Answer
verified

Which of the following events is NOT a characteristic of an action potential?

Correct Answer
verified

Match the term with the correct definition. -Local Potential

Correct Answer
verified

When a neurotransmitter binds to its receptor and increases the permeability of the postsynaptic membrane to sodium ions,

Correct Answer
verified

Which of the following is NOT true about astrocytes?

Correct Answer
verified

Receptor molecules

Correct Answer
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Exam 11: Functional Organization of Nervous Tissue

-Identify structure "E" on the neuron.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Synaptic vesicles contain neurotransmitters and are present in the

Correct AnswerverifiedShow Answer

Dendrites

Correct AnswerverifiedShow Answer

Match the term with the correct definition. -depolarization

Correct AnswerverifiedShow Answer

When repolarization of a neuron is complete,the

Correct AnswerverifiedShow Answer

-The figure is a process figure of the chemical synapse.What does "C" represent?

Correct AnswerverifiedShow Answer

Neurons arranged in a circular pathway form

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following events is NOT a characteristic of an action potential?

Correct AnswerverifiedShow Answer

Match the term with the correct definition. -Local Potential

Correct AnswerverifiedShow Answer

When a neurotransmitter binds to its receptor and increases the permeability of the postsynaptic membrane to sodium ions,

Correct AnswerverifiedShow Answer

Which of the following is NOT true about astrocytes?

Correct AnswerverifiedShow Answer

Receptor molecules

Correct AnswerverifiedShow Answer

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