Question 1

Match the term with the correct definition.
-repolarization

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) D) and E)
G) A) and E)

Question 2

A local anesthetic such as Novocaine decreases membrane permeability to Na+ ions.The use of this anesthetic will

Accepted Answer

A)  block sensory input into the CNS.
B)  enhance the development of EPSPs.
C)  cause RMP to move closer to threshold.
D)  cause Cl- ions to enter cells instead of Na+ ions.
E)  depolarize the cell.F) C) and D)
G) A) and B)

Question 3

The junction between two neurons is a

Accepted Answer

A)  ganglia.
B)  synapse.
C)  fascicle.
D)  node of Ranvier.
E)  neuromuscular junction.F) A) and B)
G) A) and C)

Question 4

Match the term with the correct definition.
-Action 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) A) and B)
G) B) and C)

Question 5

Local hyperpolarization in a synapse is called a(an)

Accepted Answer

A)  excitatory postsynaptic potential.
B)  resting membrane potential.
C)  inhibitory postsynaptic potential.
D)  gap junction potential.
E)  action potential.F) B) and C)
G) A) and E)

Question 6

Nerve fibers are also called ____________.

Accepted Answer

The answer of Nerve fibers are also called ____________....

Question 7

A neuron that conducts pain sensations to the central nervous system would be classified as a(n)

Accepted Answer

A)  motor neuron.
B)  sensory or afferent neuron.
C)  efferent neuron.
D)  association neuron.
E)  interneuron.F) A) and E)
G) None of the above

Question 8

The enteric nervous system consists of plexuses within the walls of the

Accepted Answer

A)  brain.
B)  spinal cord.
C)  digestive tract.
D)  urinary bladder.E) C) and D)
F) B) and D)

Question 9

There are _____ pairs of cranial nerves and _____ pairs of spinal nerves.

Accepted Answer

A)  10; 30
B)  31; 12
C)  12; 31
D)  30; 10
E)  12; 32F) A) and B)
G) B) and D)

Question 10

The motor (efferent) division of the peripheral nervous system

Accepted Answer

A)  is a division of the CNS.
B)  regulates the digestion of food.
C)  transmits impulses from the CNS to skeletal muscle.
D)  has nerve cell bodies located in ganglia near the spinal cord and brain.
E)  detects a stimulus.F) A) and B)
G) B) and E)

Question 11

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) A) and C)
G) A) and B)

Question 12

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) C) and D)
G) All of the above

Question 13

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) C) and D)
G) None of the above

Question 14

-Identify structure "A" on the neuron.

Accepted Answer

A)  Schwann cell
B)  Node of Ranvier
C)  neuron cell body (soma) 
D)  dendrites
E)  axonF) A) and C)
G) None of the above

Question 15

A neuron within the central nervous system that carries action potentials from one neuron to another is called a(n) ____________.

Accepted Answer

A)  motor neuron
B)  sensory neuron
C)  afferent neuron
D)  efferent neuron
E)  interneuronF) A) and C)
G) B) and E)

Question 16

Axons contain

Accepted Answer

A)  the trigger zone.
B)  foot processes.
C)  Nissl bodies.
D)  the soma.
E)  the rough endoplasmic reticulum.F) A) and B)
G) A) and C)

Question 17

Neurotransmitters

Accepted Answer

A)  stimulate presynaptic terminals.
B)  remain in the synaptic cleft for long periods of time.
C)  bind irreversibly to the receptor molecules of the postsynaptic membrane.
D)  cause the production of action potentials in the postsynaptic membrane.
E)  do not affect membrane channels in the postsynaptic membrane.F) A) and E)
G) A) and B)

Question 18

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) A) and E)
G) A) and D)

Question 19

Suppose both excitatory and inhibitory neurons synapse with a single postsynaptic neuron.What determines if an action potential is initiated in the postsynaptic neuron?

Accepted Answer

A)  the kind of neuron involved
B)  the size of the neuron involved
C)  whether the neuron is myelinated or non-myelinated
D)  the number of EPSPs in relation to the number of IPSPs
E)  This situation is not possible in humans.F) B) and E)
G) None of the above

Question 20

Depolarization of the nerve cell membrane occurs when there is a rapid influx (inflow) of

Accepted Answer

A)  potassium ions.
B)  chloride ions.
C)  calcium ions.
D)  sodium ions.
E)  proteins.F) A) and E)
G) A) and D)

Exam 11: Functional Organization of Nervous Tissue

Match the term with the correct definition. -Action Potential

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Axons contain

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The junction between two neurons is a

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Nerve fibers are also called ____________.

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Local hyperpolarization in a synapse is called a(an)

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A neuron that conducts pain sensations to the central nervous system would be classified as a(n)

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Action potentials at a chemical synapse

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Neurotransmitters

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

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Depolarization of the nerve cell membrane occurs when there is a rapid influx (inflow) of

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Match the term with the correct definition. -repolarization

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Suppose both excitatory and inhibitory neurons synapse with a single postsynaptic neuron.What determines if an action potential is initiated in the postsynaptic neuron?

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-Identify structure "A" on the neuron.

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A local potential

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The motor (efferent) division of the peripheral nervous system

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There are _____ pairs of cranial nerves and _____ pairs of spinal nerves.

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Which of the following situations occurs in electrically excitable cells?

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The enteric nervous system consists of plexuses within the walls of the

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A neuron within the central nervous system that carries action potentials from one neuron to another is called a(n) ____________.

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A local anesthetic such as Novocaine decreases membrane permeability to Na+ ions.The use of this anesthetic will

Correct AnswerverifiedShow Answer

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There are _ pairs of cranial nerves and _ pairs of spinal nerves.

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