Question 1

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

Accepted Answer

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

Question 2

Identify the FALSE statement.

Accepted Answer

A)  EPSPs that reach threshold can initiate an action potential. 
B)  The trigger zone is the integrating center of the neuron. 
C)  IPSPs depolarize the membrane. 
D)  All of the statements are true. 
A)  EPSPs that reach threshold can initiate an action potential. 
B)  The trigger zone is the integrating center of the neuron. 
C)  IPSPs depolarize the membrane. 
D)  All of the statements are true. C

Question 3

Match the term with its description (answers may be used more than once).
-cells in the PNS that form 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 D

Question 4

Your study partner has concluded that a single action potential,once initiated,spreads down the length of an axon,non-decrementally; similarly,a single graded potential spreads down the length of a dendrite,but with decrement.Is she completely correct? Explain.How can the mechanism of decremental and non-decremental conduction help her sort this out? How is the process different in myelinated vs.unmyelinated neurons? How may the dominoes analogy help her to understand signal propagation?

Accepted Answer

While she is correct about graded potent

Question 5

All of the following must occur before a second action potential can begin,EXCEPT

Accepted Answer

A)  the Na+ and K+ ions that moved in/out of the cell must move back to their original compartments. 
B)  the Na+ inactivation gate must open and the Na+ activation gate must close. 
C)  the absolute refractory period must occur. 
D)  the Na+ and K+ ions that moved in/out of the cell must move back to their original compartments; the Na+ inactivation gate must open; and the Na+ activation gate must close. 
E)  None of the answers are correct. 
A)  the Na+ and K+ ions that moved in/out of the cell must move back to their original compartments. 
B)  the Na+ inactivation gate must open and the Na+ activation gate must close. 
C)  the absolute refractory period must occur. 
D)  the Na+ and K+ ions that moved in/out of the cell must move back to their original compartments; the Na+ inactivation gate must open; and the Na+ activation gate must close. 
E)  None of the answers are correct.

Question 6

The gaps between Schwann cells are called synapses.

Accepted Answer

A) True 
 B)False

Question 7

The axon is connected to the cell body by the

Accepted Answer

A)  myelin sheath. 
B)  axon terminal. 
C)  collaterals. 
D)  axon hillock. 
E)  synapse. 
A)  myelin sheath. 
B)  axon terminal. 
C)  collaterals. 
D)  axon hillock. 
E)  synapse.

Question 8

Match the term with its description (answers may be used more than once).
-highly branched cells that transfer nutrients between blood vessels and neurons

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 9

The falling phase of the action potential is due primarily to

Accepted Answer

A)  Na+ flow in the cell only. 
B)  Na+ flow out of the cell only. 
C)  K+ flow out of the cell only. 
D)  K+ flow into the cell only. 
E)  Na+ flow out of the cell and K+ flow into the cell. 
A)  Na+ flow in the cell only. 
B)  Na+ flow out of the cell only. 
C)  K+ flow out of the cell only. 
D)  K+ flow into the cell only. 
E)  Na+ flow out of the cell and K+ flow into the cell.

Question 10

The site of information integration in the nervous system is the

Accepted Answer

A)  chemical synapse. 
B)  electrical synapse. 
C)  trigger zone. 
D)  dendritic membrane. 
E)  axon terminal. 
A)  chemical synapse. 
B)  electrical synapse. 
C)  trigger zone. 
D)  dendritic membrane. 
E)  axon terminal.

Question 11

What factors determine the maximum frequency of action potentials conducted by an axon?

Accepted Answer

Maximum frequency is mostly dependent up

Question 12

The ________ principle states that the properties of the action potential are independent of the relative strength of the depolarizing stimulus.

Accepted Answer

The answer of The ________ principle states that the properties...

Question 13

Information coming into the central nervous system is transmitted along ________ neurons.

Accepted Answer

A)  afferent 
B)  sensory 
C)  efferent 
D)  afferent and sensory 
E)  sensory and efferent 
A)  afferent 
B)  sensory 
C)  efferent 
D)  afferent and sensory 
E)  sensory and efferent

Question 14

A change in the conditions in the axon terminal can cause a change in the environment of the cell body as a result of ________.

Accepted Answer

retrograde

Question 15

Microvilli are present on cells that,because of their function,benefit from an increased membrane surface area.Which structure(s)on a neuron provide a comparable benefit?

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 16

Name the two factors that influence the membrane potential.

Accepted Answer

1.the concentration

Question 17

What is the trigger zone? Where is the trigger zone found in efferent,afferent,and interneurons? Do the terms trigger zone and axon hillock have the same meaning? Explain.

Accepted Answer

The trigger zone is an area of the neuro

Question 18

The rearrangement of connections at synapses,which occurs throughout life,is termed

Accepted Answer

A)  elasticity. 
B)  intelligence. 
C)  plasticity. 
D)  senility. 
E)  synchronicity. 
A)  elasticity. 
B)  intelligence. 
C)  plasticity. 
D)  senility. 
E)  synchronicity.

Question 19

Repair of damaged neurons can be assisted by certain neurotrophic factors secreted by the

Accepted Answer

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

Question 20

The primary problem in hyperkalemia is

Accepted Answer

A)  that neurons are harder to excite because their resting potential is hyperpolarized. 
B)  that neurons are hyperexcitable because their resting potential is closer to threshold. 
C)  that neurons respond too quickly to smaller graded potentials. 
D)  neurons are harder to excite because their resting potential is hyperpolarized and neurons respond too quickly to smaller graded potentials. 
E)  neurons are hyperexcitable because their resting potential is closer to threshold and neurons respond too quickly to smaller graded potentials. 
A)  that neurons are harder to excite because their resting potential is hyperpolarized. 
B)  that neurons are hyperexcitable because their resting potential is closer to threshold. 
C)  that neurons respond too quickly to smaller graded potentials. 
D)  neurons are harder to excite because their resting potential is hyperpolarized and neurons respond too quickly to smaller graded potentials. 
E)  neurons are hyperexcitable because their resting potential is closer to threshold and neurons respond too quickly to smaller graded potentials.

Exam 8: Neurons: Cellular and Network Properties

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

Identify the FALSE statement.

Match the term with its description (answers may be used more than once). -cells in the PNS that form myelin

All of the following must occur before a second action potential can begin,EXCEPT

The gaps between Schwann cells are called synapses.

The axon is connected to the cell body by the

Match the term with its description (answers may be used more than once). -highly branched cells that transfer nutrients between blood vessels and neurons

The falling phase of the action potential is due primarily to

The site of information integration in the nervous system is the

What factors determine the maximum frequency of action potentials conducted by an axon?

The ________ principle states that the properties of the action potential are independent of the relative strength of the depolarizing stimulus.

Information coming into the central nervous system is transmitted along ________ neurons.

A change in the conditions in the axon terminal can cause a change in the environment of the cell body as a result of ________.

Microvilli are present on cells that,because of their function,benefit from an increased membrane surface area.Which structure(s)on a neuron provide a comparable benefit?

Name the two factors that influence the membrane potential.

What is the trigger zone? Where is the trigger zone found in efferent,afferent,and interneurons? Do the terms trigger zone and axon hillock have the same meaning? Explain.

The rearrangement of connections at synapses,which occurs throughout life,is termed

Repair of damaged neurons can be assisted by certain neurotrophic factors secreted by the

The primary problem in hyperkalemia is

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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