Question 1

Use the Nernst equation to predict the membrane potential for each ion.

Accepted Answer

E_K+ = 61 log 150/5 = ...

Question 2

Excitatory neurotransmitters of the CNS usually act by opening ________ channels.

Accepted Answer

A)   Na+
B)   K+
C)   Cl-
D)   H+
E)   Ca2+F) C) and D)
G) All of the above

Question 3

Match the glial cell to the nervous system division in which it is found.
-astrocytes

Accepted Answer

A)  central nervous system
B)  peripheral nervous systemC) A) and B)
D) undefined

Question 4

You and your lab partner have prepared a frog nerve for gathering data on action potentials.You connect an electronic stimulator to the nerve and ask your partner to gradually increase the voltage until you see an action potential.Your partner says that the voltage knob is stuck,that is,it will not increase the voltage.Is there another way to trigger action potentials using this stimulator? If so,what do you tell your partner to do?

Accepted Answer

Your lab partner can increase ...

Question 5

The sum of all of the electrical and chemical forces active across the membrane is known as the ________.

Accepted Answer

The answer of The sum of all of the electrical...

Question 6

Choose all of the items that are incorrectly matched.

Accepted Answer

A)   inactivation gate - closed at rest
B)   activation gate - open at rest
C)   inactivation gate - closed during repolarization
D)   activation gate - opens during depolarization
E)   All of the answers are incorrectly matched.F) B) and E)
G) C) and D)

Question 7

These glial cells may contribute to Lou Gehrig's disease.

Accepted Answer

A)   Schwann cells
B)   astrocytes
C)   microglia
D)   oligodendrocytes
E)   ependymal cellsF) A) and E)
G) A) and D)

Question 8

Identify the FALSE statement.

Accepted Answer

A)   Under normal conditions, all action potentials in a given cell are identical.
B)   Between nodes of Ranvier, signal conduction is decremental.
C)   The amplitude of the action potential depends on the amplitude of the graded potential that precedes it.
D)   The voltage-gated sodium and potassium channels begin to open during the depolarization.E) A) and B)
F) All of the above

Question 9

Which of the following will best increase the conduction rate of action potentials?

Accepted Answer

A)   Increase the diameter of the axon, decrease the resistance of the axon membrane to ion leakage.
B)   Increase the diameter of the axon, increase the resistance of the axon membrane to ion leakage.
C)   Decrease the diameter of the axon, decrease the resistance of the axon membrane to ion leakage.
D)   Decrease the diameter of the axon, increase the resistance of the axon membrane to ion leakage.E) B) and C)
F) B) and D)

Question 10

Graded potentials that increase the likelihood of an action potential bring the ________ closer to threshold.

Accepted Answer

The answer of Graded potentials that increase the likelihood of...

Question 11

Your study partner in your physiology class insists that axons conduct graded potentials,and that they play a vital role in production of the action potential.Do you agree or disagree? Defend your answer.

Accepted Answer

Your study partner is correct.This is ea...

Question 12

Match the term with its description (answers may be used more than once) .
-may be covered with myelin

Accepted Answer

A)  ependymal cells
B)  astrocytes
C)  satellite cells
D)  Schwann cells
E)  oligodendrocytesF) microgliaG) B) and E)
H) All of the above

Question 13

The inhibitory neurotransmitters of the CNS,GABA and glycine,act by opening ________ channels.

Accepted Answer

A)   only Na+
B)   only Cl-
C)   only K+
D)   only Ca2+
E)   Na+ and K+F) A) and B)
G) A) and C)

Question 14

Myelin is formed by

Accepted Answer

A)   axons only.
B)   Schwann cells only.
C)   oligodendrocytes only.
D)   Schwann cells and oligodendrocytes.E) A) and D)
F) All of the above

Question 15

Write out the Nernst and GHK equations,and explain the significance of each.Define equilibrium potential.

Accepted Answer

This is discussed in the "Electrical Sig...

Question 16

In spatial summation the same stimulus is repeated until a threshold level of depolarization is reached.

Accepted Answer

A) True 
 B)False

Question 17

Match the type of signal to its description (answers may be used more than once) .
-require(s) a minimum stimulus to occur

Accepted Answer

A)  graded potential
B)  action potential
C)  bothD) A) and C)
E) None of the above

Question 18

A home satellite dish receives signals from a satellite,allowing your television to display TV shows.Which part of a neuron is analogous to the satellite dish?

Accepted Answer

A)   cell body
B)   dendrites
C)   axon
D)   varicosities
E)   collateralsF) B) and C)
G) C) and D)

Question 19

Match the term with its description (answers may be used more than once) .
-cells that are a source of neural stem cells

Accepted Answer

A)  ependymal cells
B)  astrocytes
C)  satellite cells
D)  Schwann cells
E)  oligodendrocytesF) microgliaG) A) and B)
H) B) and C)

Question 20

The following are steps involved in transmission at the cholinergic synapse:
1) Chemically regulated ion channels on the postsynaptic membrane are activated.
2) Calcium ions enter the axon terminal.
3) An action potential depolarizes the axon terminal at the presynaptic membrane.
4) Acetylcholine is released from storage vesicles by exocytosis.
5) Acetylcholine binds to receptors on the postsynaptic membrane.
The correct sequence for these events is

Accepted Answer

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

Exam 8: Neurons: Cellular and Network Properties

Graded potentials that increase the likelihood of an action potential bring the ________ closer to threshold.

Correct Answer
verified

Correct Answer
verified
Your lab partner can increase ...
View Answer

Match the glial cell to the nervous system division in which it is found. -astrocytes

Correct Answer
verified

The inhibitory neurotransmitters of the CNS,GABA and glycine,act by opening ________ channels.

Correct Answer
verified

Identify the FALSE statement.

Correct Answer
verified

Which of the following will best increase the conduction rate of action potentials?

Correct Answer
verified

Correct Answer
verified

Choose all of the items that are incorrectly matched.

Correct Answer
verified

Your study partner in your physiology class insists that axons conduct graded potentials,and that they play a vital role in production of the action potential.Do you agree or disagree? Defend your answer.

Correct Answer
verified
Your study partner is correct.This is ea...
View Answer

In spatial summation the same stimulus is repeated until a threshold level of depolarization is reached.

Correct Answer
verified

Myelin is formed by

Correct Answer
verified

Use the Nernst equation to predict the membrane potential for each ion.

Correct Answer
verified
E_K+ = 61 log 150/5 = ...
View Answer

Match the type of signal to its description (answers may be used more than once) . -require(s) a minimum stimulus to occur

Correct Answer
verified

The sum of all of the electrical and chemical forces active across the membrane is known as the ________.

Correct Answer
verified

A home satellite dish receives signals from a satellite,allowing your television to display TV shows.Which part of a neuron is analogous to the satellite dish?

Correct Answer
verified

Match the term with its description (answers may be used more than once) . -cells that are a source of neural stem cells

Correct Answer
verified

Excitatory neurotransmitters of the CNS usually act by opening ________ channels.

Correct Answer
verified

Match the term with its description (answers may be used more than once) . -may be covered with myelin

Correct Answer
verified

These glial cells may contribute to Lou Gehrig's disease.

Correct Answer
verified

Write out the Nernst and GHK equations,and explain the significance of each.Define equilibrium potential.

Correct Answer
verified
This is discussed in the "Electrical Sig...
View Answer

Exam 8: Neurons: Cellular and Network Properties

Graded potentials that increase the likelihood of an action potential bring the ________ closer to threshold.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedYour lab partner can increase ...View AnswerShow Answer

Match the glial cell to the nervous system division in which it is found. -astrocytes

Correct AnswerverifiedShow Answer

The inhibitory neurotransmitters of the CNS,GABA and glycine,act by opening ________ channels.

Correct AnswerverifiedShow Answer

Identify the FALSE statement.

Correct AnswerverifiedShow Answer

Which of the following will best increase the conduction rate of action potentials?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Choose all of the items that are incorrectly matched.

Correct AnswerverifiedShow Answer

Your study partner in your physiology class insists that axons conduct graded potentials,and that they play a vital role in production of the action potential.Do you agree or disagree? Defend your answer.

Correct AnswerverifiedYour study partner is correct.This is ea...View AnswerShow Answer

In spatial summation the same stimulus is repeated until a threshold level of depolarization is reached.

Correct AnswerverifiedShow Answer

Myelin is formed by

Correct AnswerverifiedShow Answer

Use the Nernst equation to predict the membrane potential for each ion.

Correct AnswerverifiedEK+ = 61 log 150/5 = ...View AnswerShow Answer

Match the type of signal to its description (answers may be used more than once) . -require(s) a minimum stimulus to occur

Correct AnswerverifiedShow Answer

The sum of all of the electrical and chemical forces active across the membrane is known as the ________.

Correct AnswerverifiedShow Answer

A home satellite dish receives signals from a satellite,allowing your television to display TV shows.Which part of a neuron is analogous to the satellite dish?

Correct AnswerverifiedShow Answer

Match the term with its description (answers may be used more than once) . -cells that are a source of neural stem cells

Correct AnswerverifiedShow Answer

Excitatory neurotransmitters of the CNS usually act by opening ________ channels.

Correct AnswerverifiedShow Answer

Match the term with its description (answers may be used more than once) . -may be covered with myelin

Correct AnswerverifiedShow Answer

These glial cells may contribute to Lou Gehrig's disease.

Correct AnswerverifiedShow Answer

Write out the Nernst and GHK equations,and explain the significance of each.Define equilibrium potential.

Correct AnswerverifiedThis is discussed in the "Electrical Sig...View AnswerShow Answer

Correct Answer
verified

Correct Answer
verified
Your lab partner can increase ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Your study partner is correct.This is ea...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
E_K+ = 61 log 150/5 = ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
This is discussed in the "Electrical Sig...
View Answer