Question 1

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

Question 2

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. 
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.

Question 3

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. 
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.

Question 4

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 5

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

Accepted Answer

A) central nervous system 
B) peripheral nervous system 
A) central nervous system 
B) peripheral nervous system

Question 6

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 7

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

Question 8

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

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

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. 
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.

Question 11

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 12

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, 5 
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, 5

Question 13

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)  collaterals 
A)  cell body 
B)  dendrites 
C)  axon 
D)  varicosities 
E)  collaterals

Question 14

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

Accepted Answer

A)  Na+ 
B)  K+ 
C)  Cl- 
D)  H+ 
E)  Ca2+ 
A)  Na+ 
B)  K+ 
C)  Cl- 
D)  H+ 
E)  Ca2+

Question 15

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

Accepted Answer

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

Question 16

Myelin is formed by

Accepted Answer

A)  axons only. 
B)  Schwann cells only. 
C)  oligodendrocytes only. 
D)  Schwann cells and oligodendrocytes. 
A)  axons only. 
B)  Schwann cells only. 
C)  oligodendrocytes only. 
D)  Schwann cells and oligodendrocytes.

Question 17

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 18

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

Accepted Answer

E_K+ = 61 log 150/5 =

Question 19

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 20

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) both 
A) graded potential 
B) action potential 
C) both

Exam 8: Neurons: Cellular and Network Properties

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

Choose all of the items that are incorrectly matched.

Identify the FALSE statement.

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.

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

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

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

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

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

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

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

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?

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

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

Myelin is formed by

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

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

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

Introduction to Physiology

Molecular Interactions

Compartmentation: Cells and Tissues

Energy and Cellular Metabolism

Membrane Dynamics

Communication, Integration, and Homeostasis

Introduction to the Endocrine System

The Central Nervous System

Sensory Physiology

Efferent Division: Autonomic and Somatic Motor Control

Muscles

Integrative Physiology I: Control of Body Movement

Cardiovascular Physiology

Blood Flow and the Control of Blood Pressure

Blood

Mechanics of Breathing

Gas Exchange and Transport

The Kidneys

Integrative Physiology II: Fluid and Electrolyte Balance

The Digestive System

Metabolism and Energy Balance

Endocrine Control of Growth and Metabolism

The Immune System

Integrative Physiology III: Exercise

Reproduction and Development

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