Question 1

Inhibitory postsynaptic potentials (IPSPs )

Accepted Answer

A)   result in local depolarizations.
B)   result in local hyperpolarizations.
C)   increase membrane permeability to sodium ions.
D)   prevent the escape of potassium ions.
E)   prevent the escape of calcium ions.

Question 2

Compare and contrast Schwann cells and oligodendrocytes.

Accepted Answer

Both insulate axons by creating myelin.S...

Question 3

Explain why the voltage-gated Na+ channels can close while the cell is depolarized even though the depolarization was the initial stimulus for the channel opening.Include a discussion on refractory periods and explain why action potentials travel in only one direction.

Accepted Answer

The channels have two gates: activation ...

Question 4

Anterograde and retrograde axonal transport are forms of ________ transport.

Accepted Answer

A)   fast
B)   slow
C)   Neither of these

Question 5

Explain the two reasons why graded potentials lose strength as they move through the cell.Why don't action potentials lose strength?

Accepted Answer

As a depolarization wave moves through t...

Question 6

The region where the axon terminal meets its target cell is called the

Accepted Answer

A)   collateral.
B)   hillock.
C)   synapse.
D)   nerve.
E)   dendrites.

Question 7

If the sodium-potassium pumps in the cell membrane of a neuron fail to function,over time

Accepted Answer

A)   the extracellular concentration of potassium ion will increase.
B)   the intracellular concentration of sodium ion will increase.
C)   the membrane resting potential will become more positive than normal.
D)   All of the answers are correct.

Question 8

Schwann cells are the primary type of glial cell associated with the central nervous system.

Accepted Answer

A) True 
 B)False

Question 9

In the membrane of a resting nerve cell,when chemically gated Cl- channels open,

Accepted Answer

A)   Cl- ions enter the cell.
B)   Cl- ions leave the cell.
C)   the cell becomes depolarized.
D)   Cl- ions enter the cell and the cell becomes depolarized.
E)   Cl- ions leave the cell and the cell becomes depolarized.

Question 10

Match the term with its description (answers may be used more than once) .
-where most graded potentials originate

Accepted Answer

A)  ependymal cells
B)  astrocytes
C)  satellite cells
D)  Schwann cells
E)  oligodendrocytesF) microglia

Question 11

Explain the roles that the AMPA and NMDA receptors play in long-term potentiation.

Accepted Answer

Both AMPA and NMDA receptors are located...

Question 12

Match the term with its description (answers may be used more than once) .
-contribute(s) most to membrane surface area of cell

Accepted Answer

A)  ependymal cells
B)  astrocytes
C)  satellite cells
D)  Schwann cells
E)  oligodendrocytesF) microglia

Question 13

Match the type of signal to its description (answers may be used more than once) .
-result(s) from influx of sodium

Accepted Answer

A)  graded potential
B)  action potential
C)  both

Question 14

The potential difference across a membrane or other barrier is a measure of the ________ across the barrier.

Accepted Answer

The answer of The potential difference across a membrane or...

Question 15

The all-or-none principle states that

Accepted Answer

A)   all stimuli will produce identical action potentials.
B)   all stimuli great enough to bring the membrane to threshold will produce action potentials of identical magnitude.
C)   the greater the magnitude of the stimuli, the greater the intensity of the action potential.
D)   only sensory stimuli can activate action potentials.
E)   only motor stimuli can activate action potentials.

Question 16

Which ion(s) is/are higher in concentration inside the cell compared to outside?

Accepted Answer

A)   potassium
B)   sodium
C)   chloride
D)   calcium
E)   More than one of the answers is correct.

Question 17

If an axon has an absolute refractory period of 2 msec,what is the maximum frequency of action potential (AP)production in that neuron?

Accepted Answer

X AP/2 msec × 1000 m...

Question 18

A damaged neuron has a better chance of survival and repair if the ________ is/are undamaged.

Accepted Answer

A)   cell body
B)   axon
C)   dendrites
D)   Schwann cells
E)   axon and dendrites

Question 19

The time during which an excitable membrane cannot respond to further stimulation regardless of the stimulus strength is the ________.

Accepted Answer

absolute r...

Question 20

The following are the main steps in the generation of an action potential:
1) sodium channels are inactivated
2) more voltage-regulated potassium channels open and potassium moves out of the cell,initiating repolarization
3) sodium channels regain their normal properties
4) a graded depolarization brings an area of an excitable membrane to threshold
5) a temporary hyperpolarization occurs
6) sodium channel activation occurs
7) sodium ions enter the cell and further depolarization occurs
The proper sequence of these events is

Accepted Answer

A)   4, 6, 7, 3, 2, 5, 1.
B)   4, 6, 7, 1, 2, 5, 3.
C)   6, 7, 4, 1, 2, 3, 5.
D)   2, 4, 6, 7, 1, 3, 5.
E)   4, 2, 5, 6, 7, 3, 1.

Exam 8: Neurons: Cellular and Network Properties

Anterograde and retrograde axonal transport are forms of ________ transport.

Correct Answer
verified

The potential difference across a membrane or other barrier is a measure of the ________ across the barrier.

Correct Answer
verified

In the membrane of a resting nerve cell,when chemically gated Cl^- channels open,

Correct Answer
verified

Inhibitory postsynaptic potentials (IPSPs )

Correct Answer
verified

Schwann cells are the primary type of glial cell associated with the central nervous system.

Correct Answer
verified

Match the type of signal to its description (answers may be used more than once) . -result(s) from influx of sodium

Correct Answer
verified

Correct Answer
verified

Match the term with its description (answers may be used more than once) . -where most graded potentials originate

Correct Answer
verified

The region where the axon terminal meets its target cell is called the

Correct Answer
verified

The time during which an excitable membrane cannot respond to further stimulation regardless of the stimulus strength is the ________.

Correct Answer
verified
absolute r...
View Answer

If an axon has an absolute refractory period of 2 msec,what is the maximum frequency of action potential (AP)production in that neuron?

Correct Answer
verified
X AP/2 msec × 1000 m...
View Answer

If the sodium-potassium pumps in the cell membrane of a neuron fail to function,over time

Correct Answer
verified

Explain why the voltage-gated Na⁺ channels can close while the cell is depolarized even though the depolarization was the initial stimulus for the channel opening.Include a discussion on refractory periods and explain why action potentials travel in only one direction.

Correct Answer
verified
The channels have two gates: activation ...
View Answer

Which ion(s) is/are higher in concentration inside the cell compared to outside?

Correct Answer
verified

The all-or-none principle states that

Correct Answer
verified

Match the term with its description (answers may be used more than once) . -contribute(s) most to membrane surface area of cell

Correct Answer
verified

A damaged neuron has a better chance of survival and repair if the ________ is/are undamaged.

Correct Answer
verified

Explain the roles that the AMPA and NMDA receptors play in long-term potentiation.

Correct Answer
verified
Both AMPA and NMDA receptors are located...
View Answer

Compare and contrast Schwann cells and oligodendrocytes.

Correct Answer
verified
Both insulate axons by creating myelin.S...
View Answer

Explain the two reasons why graded potentials lose strength as they move through the cell.Why don't action potentials lose strength?

Correct Answer
verified
As a depolarization wave moves through t...
View Answer

Exam 8: Neurons: Cellular and Network Properties

Anterograde and retrograde axonal transport are forms of ________ transport.

Correct AnswerverifiedShow Answer

The potential difference across a membrane or other barrier is a measure of the ________ across the barrier.

Correct AnswerverifiedShow Answer

In the membrane of a resting nerve cell,when chemically gated Cl- channels open,

Correct AnswerverifiedShow Answer

Inhibitory postsynaptic potentials (IPSPs )

Correct AnswerverifiedShow Answer

Schwann cells are the primary type of glial cell associated with the central nervous system.

Correct AnswerverifiedShow Answer

Match the type of signal to its description (answers may be used more than once) . -result(s) from influx of sodium

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Match the term with its description (answers may be used more than once) . -where most graded potentials originate

Correct AnswerverifiedShow Answer

The region where the axon terminal meets its target cell is called the

Correct AnswerverifiedShow Answer

The time during which an excitable membrane cannot respond to further stimulation regardless of the stimulus strength is the ________.

Correct Answerverifiedabsolute r...View AnswerShow Answer

If an axon has an absolute refractory period of 2 msec,what is the maximum frequency of action potential (AP)production in that neuron?

Correct AnswerverifiedX AP/2 msec × 1000 m...View AnswerShow Answer

If the sodium-potassium pumps in the cell membrane of a neuron fail to function,over time

Correct AnswerverifiedShow Answer

Explain why the voltage-gated Na+ channels can close while the cell is depolarized even though the depolarization was the initial stimulus for the channel opening.Include a discussion on refractory periods and explain why action potentials travel in only one direction.

Correct AnswerverifiedThe channels have two gates: activation ...View AnswerShow Answer

Which ion(s) is/are higher in concentration inside the cell compared to outside?

Correct AnswerverifiedShow Answer

The all-or-none principle states that

Correct AnswerverifiedShow Answer

Match the term with its description (answers may be used more than once) . -contribute(s) most to membrane surface area of cell

Correct AnswerverifiedShow Answer

A damaged neuron has a better chance of survival and repair if the ________ is/are undamaged.

Correct AnswerverifiedShow Answer

Explain the roles that the AMPA and NMDA receptors play in long-term potentiation.

Correct AnswerverifiedBoth AMPA and NMDA receptors are located...View AnswerShow Answer

Compare and contrast Schwann cells and oligodendrocytes.

Correct AnswerverifiedBoth insulate axons by creating myelin.S...View AnswerShow Answer

Explain the two reasons why graded potentials lose strength as they move through the cell.Why don't action potentials lose strength?

Correct AnswerverifiedAs a depolarization wave moves through t...View AnswerShow Answer

Correct Answer
verified

Correct Answer
verified

In the membrane of a resting nerve cell,when chemically gated Cl^- channels open,

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
absolute r...
View Answer

Correct Answer
verified
X AP/2 msec × 1000 m...
View Answer

Correct Answer
verified

Explain why the voltage-gated Na⁺ channels can close while the cell is depolarized even though the depolarization was the initial stimulus for the channel opening.Include a discussion on refractory periods and explain why action potentials travel in only one direction.

Correct Answer
verified
The channels have two gates: activation ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Both AMPA and NMDA receptors are located...
View Answer

Correct Answer
verified
Both insulate axons by creating myelin.S...
View Answer

Correct Answer
verified
As a depolarization wave moves through t...
View Answer