Question 1

An inhibitory postsynaptic potential (IPSP)  can result from the

Accepted Answer

A)   influx of calcium ions.
B)   influx of sodium ions.
C)   influx of chloride.
D)   outflow of potassium ions.
E)   either influx of chloride or outflow of potassium ions.F) B) and D)
G) All of the above

Question 2

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

Accepted Answer

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

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

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

Question 5

The same neurotransmitter binds to a postsynaptic cell but produces a variety of different effects. What does this mean?

Accepted Answer

A)   The postsynaptic cell is expressing different types of receptors for the same neurotransmitter.
B)   The strength of the neurotransmitter varies.
C)   The amount of neurotransmitter released produces varying effects.
D)   The size of the postsynaptic cell makes a difference in neurotransmitter effects.
E)   The neuron must be dying.F) C) and E)
G) A) and E)

Question 6

Axons

Accepted Answer

A)   contain the nucleus.
B)   are numerous extensions from each neuron.
C)   do not have a trigger zone.
D)   have a distal portion that branches to form the presynaptic terminals.
E)   do not have a resting membrane potential.F) B) and C)
G) A) and C)

Question 7

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 E)
G) C) and E)

Question 8

Identify the statement that best differentiates gray matter and white matter.

Accepted Answer

A)   Gray matter consists of bundles of axons and white matter consists of groups of cell bodies and dendrites.
B)   Gray matter consists of all parts of neurons and white matter is mostly glial cells.
C)   Gray matter consists of cell bodies and dendrites whereas white matter consists mostly of myelinated axonsD) B) and C)
E) A) and C)

Question 9

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 B)
G) D) and E)

Question 10

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) A) and E)
G) C) and E)

Question 11

Gray matter has little myelination, whereas white matter has abundant myelination.
TRUE

Accepted Answer

A) True 
 B)False

Question 12

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) B) and D)
G) B) and E)

Question 13

Match the following concerning concentration differences across the plasma membrane.
-requires ATP

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) A) and B)

Question 14

Voltage-gated sodium channels are sensitive to changes in the extracellular concentration of

Accepted Answer

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

Question 15

Which of the following is true?

Accepted Answer

A)   Unmyelinated axons rest in invaginations of Schwann cells or oligodendrocytes..
B)   Myelination will not influence the speed of conduction of action potentials.
C)   The myelin sheath inhibits the flow of electrical charges at nodes.
D)   The myelin sheath is a protein wrapping.
E)   The myelin sheath does not electrically insulate the axons from one another.F) None of the above
G) B) and C)

Question 16

If the charge difference across the plasma membrane is decreased,

Accepted Answer

A)   the potential difference across the plasma membrane does not change.
B)   the membrane potential is more positive.
C)   the change is called hyperpolarization.
D)   negative proteins can leave the cell.
E)   the membrane potential is more negative.F) A) and D)
G) B) and E)

Question 17

In order for local potentials to trigger an action potential, the membrane must reach a level called the ______.

Accepted Answer

A)   maximum potential
B)   spike potential
C)   threshold
D)   resting membrane potentialE) A) and D)
F) A) and C)

Question 18

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) B) and C)
F) None of the above

Question 19

____________ are collections of neuron cell bodies located outside of the central nervous system.
ganglia

Accepted Answer

The answer of ____________ are collections of neuron cell bodies...

Question 20

Neurons in the skin that are responsible for detecting pain are

Accepted Answer

A)   apolar.
B)   pseudo-unipolar.
C)   bipolar.
D)   multipolar.E) A) and B)
F) A) and C)

Exam 11: Functional Organization of Nervous Tissue

Gray matter has little myelination, whereas white matter has abundant myelination. TRUE

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The speed of an action potential depends upon

Correct AnswerverifiedShow Answer

Match the following concerning concentration differences across the plasma membrane. -requires ATP

Correct AnswerverifiedShow Answer

Identify structure "A" on the neuron.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In order for local potentials to trigger an action potential, the membrane must reach a level called the ______.

Correct AnswerverifiedShow Answer

____________ are collections of neuron cell bodies located outside of the central nervous system. ganglia

Correct AnswerverifiedShow Answer

Which of the following is true?

Correct AnswerverifiedShow Answer

The junction between two neurons is a

Correct AnswerverifiedShow Answer

If the charge difference across the plasma membrane is decreased,

Correct AnswerverifiedShow Answer

The strength of a stimulus is communicated through

Correct AnswerverifiedShow Answer

Identify the statement that best differentiates gray matter and white matter.

Correct AnswerverifiedShow Answer

Voltage-gated sodium channels are sensitive to changes in the extracellular concentration of

Correct AnswerverifiedShow Answer

The same neurotransmitter binds to a postsynaptic cell but produces a variety of different effects. What does this mean?

Correct AnswerverifiedShow Answer

An inhibitory postsynaptic potential (IPSP) can result from the

Correct AnswerverifiedShow Answer

Axons

Correct AnswerverifiedShow Answer

Neurons in the skin that are responsible for detecting pain are

Correct AnswerverifiedShow Answer

Local hyperpolarization in a synapse is called a(an)

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified