Question 1

The branches formed as the axon approaches its target are known as

Accepted Answer

A)  spines. 
B)  hillocks. 
C)  collaterals. 
D)  spikes. 
A)  spines. 
B)  hillocks. 
C)  collaterals. 
D)  spikes. C

Question 2

Ion selectivity is a feature of

Accepted Answer

A)  both ion channels and ion pumps. 
B)  neither ion channels nor ion pumps. 
C)  ion channels,but not ion pumps. 
D)  ion pumps,but not ion channels. 
A)  both ion channels and ion pumps. 
B)  neither ion channels nor ion pumps. 
C)  ion channels,but not ion pumps. 
D)  ion pumps,but not ion channels. A

Question 3

Intracellular fluid is rich in

Accepted Answer

A)  K+,with small amounts of Na+ and Cl-. 
B)  K+ and Cl-,with very small amounts of Na+. 
C)  Cl-,with very small amounts of K+ and Na+. 
D)  Na+ and Cl-,with small amounts of K+. 
A)  K+,with small amounts of Na+ and Cl-. 
B)  K+ and Cl-,with very small amounts of Na+. 
C)  Cl-,with very small amounts of K+ and Na+. 
D)  Na+ and Cl-,with small amounts of K+. A

Question 4

The membrane potential at which an action potential is triggered is known as the

Accepted Answer

A)  resting potential. 
B)  threshold. 
C)  absolute refractory period. 
D)  relative refractory period. 
A)  resting potential. 
B)  threshold. 
C)  absolute refractory period. 
D)  relative refractory period.

Question 5

The absolute refractory period occurs because

Accepted Answer

A)  the cell is hyperpolarized,requiring a larger than normal stimulus in order to form another action potential. 
B)  it takes time for the sodium-potassium pumps to return ion concentrations to the normal resting state. 
C)  only one action potential at a time can travel the length of an axon. 
D)  sodium channels cannot reopen until the cell regains its resting potential. 
A)  the cell is hyperpolarized,requiring a larger than normal stimulus in order to form another action potential. 
B)  it takes time for the sodium-potassium pumps to return ion concentrations to the normal resting state. 
C)  only one action potential at a time can travel the length of an axon. 
D)  sodium channels cannot reopen until the cell regains its resting potential.

Question 6

Which of the following is the correct order for events related to electrical signaling in neurons?

Accepted Answer

A)  rise,fall,absolute refractory period,threshold,relative refractory period 
B)  rise,fall,threshold,absolute refractory period,relative refractory period 
C)  threshold,rise,fall,relative refractory period,absolute refractory period 
D)  threshold,rise,fall,absolute refractory period,relative refractory period 
A)  rise,fall,absolute refractory period,threshold,relative refractory period 
B)  rise,fall,threshold,absolute refractory period,relative refractory period 
C)  threshold,rise,fall,relative refractory period,absolute refractory period 
D)  threshold,rise,fall,absolute refractory period,relative refractory period

Question 7

Exocytosis is the process that results in

Accepted Answer

A)  the generation of action potentials. 
B)  the release of neurotransmitter substance by the presynaptic neuron. 
C)  reuptake of released neurotransmitter substance. 
D)  the interaction of a molecule of neurotransmitter and a receptor site. 
A)  the generation of action potentials. 
B)  the release of neurotransmitter substance by the presynaptic neuron. 
C)  reuptake of released neurotransmitter substance. 
D)  the interaction of a molecule of neurotransmitter and a receptor site.

Question 8

Action potentials and excitatory postsynaptic potentials (EPSPs)are similar in that both

Accepted Answer

A)  are always all-or-none. 
B)  last about the same amount of time. 
C)  involve voltage-dependent ion channels. 
D)  involve the movement of sodium into cells. 
A)  are always all-or-none. 
B)  last about the same amount of time. 
C)  involve voltage-dependent ion channels. 
D)  involve the movement of sodium into cells.

Question 9

A neuron typically reaches threshold for an action potential when it is depolarized approximately _________mV.

Accepted Answer

A)  1-2 
B)  2-5 
C)  5-10 
D)  10-12 
A)  1-2 
B)  2-5 
C)  5-10 
D)  10-12

Question 10

What are three major differences between oligodendrocytes and Schwann cells?

Accepted Answer

Oligodendrocytes are found in the centra

Question 11

Tetrodotoxin,the poisonous substance produced by the puffer fish,interacts with which of the following?

Accepted Answer

A)  sodium channels located on the axon membrane 
B)  calcium channels located at the axon terminal 
C)  sodium channels located on postsynaptic dendrites 
D)  potassium channels located on the axon membrane 
A)  sodium channels located on the axon membrane 
B)  calcium channels located at the axon terminal 
C)  sodium channels located on postsynaptic dendrites 
D)  potassium channels located on the axon membrane

Question 12

Neurons that are specialized to transmit commands from the central nervous system to glands and muscles are known as

Accepted Answer

A)  sensory neurons. 
B)  motor neurons. 
C)  unipolar neurons. 
D)  interneurons. 
A)  sensory neurons. 
B)  motor neurons. 
C)  unipolar neurons. 
D)  interneurons.

Question 13

Dominick Purpura suggested that mental retardation may occur due to abnormalities in the structure of

Accepted Answer

A)  neural cell bodies. 
B)  axons. 
C)  glia. 
D)  dendrites. 
A)  neural cell bodies. 
B)  axons. 
C)  glia. 
D)  dendrites.

Question 14

Sam almost severed his arm in an accident.Which of the following statements explains why his doctors feel he will regain complete use of his arm?

Accepted Answer

A)  Astrocytes will clean up the debris surrounding the area,making it possible for the axons to regrow. 
B)  Schwann cells in the peripheral nervous system can help guide the regrowth of neural branches,helping to ensure nervous system recovery. 
C)  Oligodendrocytes form a tube in the CNS that guides the regrowth of axons. 
D)  PNS neurons are mostly bipolar;thus,they are more easily regrown. 
A)  Astrocytes will clean up the debris surrounding the area,making it possible for the axons to regrow. 
B)  Schwann cells in the peripheral nervous system can help guide the regrowth of neural branches,helping to ensure nervous system recovery. 
C)  Oligodendrocytes form a tube in the CNS that guides the regrowth of axons. 
D)  PNS neurons are mostly bipolar;thus,they are more easily regrown.

Question 15

Bipolar neurons have _________ leaving the cell body.

Accepted Answer

A)  one branch 
B)  one axon and many dendrites 
C)  two branches 
D)  one dendrite and many axons 
A)  one branch 
B)  one axon and many dendrites 
C)  two branches 
D)  one dendrite and many axons

Question 16

Synaptic vesicles are made of a(n)

Accepted Answer

A)  outer layer of protein and an inner layer of phospholipid. 
B)  single layer of phospholipid. 
C)  double layer of phospholipid. 
D)  double layer of protein. 
A)  outer layer of protein and an inner layer of phospholipid. 
B)  single layer of phospholipid. 
C)  double layer of phospholipid. 
D)  double layer of protein.

Question 17

Compared with ionotropic receptors,metabotropic receptors respond more

Accepted Answer

A)  rapidly,but with shorter-lasting effects. 
B)  rapidly,and have longer-lasting effects. 
C)  slowly,but with shorter-lasting effects. 
D)  slowly,and have longer-lasting effects. 
A)  rapidly,but with shorter-lasting effects. 
B)  rapidly,and have longer-lasting effects. 
C)  slowly,but with shorter-lasting effects. 
D)  slowly,and have longer-lasting effects.

Question 18

A single oligodendrocyte may myelinate

Accepted Answer

A)  only one axon. 
B)  2-5 axons. 
C)  6-10 axons. 
D)  15 axons or more. 
A)  only one axon. 
B)  2-5 axons. 
C)  6-10 axons. 
D)  15 axons or more.

Question 19

EPSPs can last 5-10 times as long as an action potential.

Accepted Answer

A) True 
 B)False

Question 20

Compared with segments of unmyelinated axon membrane,channels at a node of Ranvier are

Accepted Answer

A)  about the same density. 
B)  about half the density. 
C)  approximately twice as dense. 
D)  approximately ten times as dense. 
A)  about the same density. 
B)  about half the density. 
C)  approximately twice as dense. 
D)  approximately ten times as dense.

The branches formed as the axon approaches its target are known as

Ion selectivity is a feature of

Intracellular fluid is rich in

The membrane potential at which an action potential is triggered is known as the

The absolute refractory period occurs because

Which of the following is the correct order for events related to electrical signaling in neurons?

Exocytosis is the process that results in

Action potentials and excitatory postsynaptic potentials (EPSPs)are similar in that both

A neuron typically reaches threshold for an action potential when it is depolarized approximately _________mV.

What are three major differences between oligodendrocytes and Schwann cells?

Tetrodotoxin,the poisonous substance produced by the puffer fish,interacts with which of the following?

Neurons that are specialized to transmit commands from the central nervous system to glands and muscles are known as

Dominick Purpura suggested that mental retardation may occur due to abnormalities in the structure of

Sam almost severed his arm in an accident.Which of the following statements explains why his doctors feel he will regain complete use of his arm?

Bipolar neurons have _________ leaving the cell body.

Synaptic vesicles are made of a(n)

Compared with ionotropic receptors,metabotropic receptors respond more

A single oligodendrocyte may myelinate

EPSPs can last 5-10 times as long as an action potential.

Compared with segments of unmyelinated axon membrane,channels at a node of Ranvier are

Introducing Biological Psychology

The Anatomy and Evolution of the Nervous System

Psychopharmacology

Genetics and the Development of the Human Brain

Vision

Nonvisual Sensation and Perception

Movement

Temperature Regulation,thirst,and Hunger

Sexual Behavior

Sleep and Waking

Learning and Memory

Lateralization, language, and Intelligence

Emotion, reward, aggression, and Stress

Neurological Disorders

Psychological Disorders

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Exam 3: Cells of the Nervous System

The branches formed as the axon approaches its target are known as

Ion selectivity is a feature of

Intracellular fluid is rich in

The membrane potential at which an action potential is triggered is known as the

The absolute refractory period occurs because

Which of the following is the correct order for events related to electrical signaling in neurons?

Exocytosis is the process that results in

Action potentials and excitatory postsynaptic potentials (EPSPs)are similar in that both

A neuron typically reaches threshold for an action potential when it is depolarized approximately _________mV.

What are three major differences between oligodendrocytes and Schwann cells?

Tetrodotoxin,the poisonous substance produced by the puffer fish,interacts with which of the following?

Neurons that are specialized to transmit commands from the central nervous system to glands and muscles are known as

Dominick Purpura suggested that mental retardation may occur due to abnormalities in the structure of

Sam almost severed his arm in an accident.Which of the following statements explains why his doctors feel he will regain complete use of his arm?

Bipolar neurons have _________ leaving the cell body.

Synaptic vesicles are made of a(n)

Compared with ionotropic receptors,metabotropic receptors respond more

A single oligodendrocyte may myelinate

EPSPs can last 5-10 times as long as an action potential.

Compared with segments of unmyelinated axon membrane,channels at a node of Ranvier are

Introducing Biological Psychology

The Anatomy and Evolution of the Nervous System

Psychopharmacology

Genetics and the Development of the Human Brain

Vision

Nonvisual Sensation and Perception

Movement

Temperature Regulation,thirst,and Hunger

Sexual Behavior

Sleep and Waking

Learning and Memory

Lateralization, language, and Intelligence

Emotion, reward, aggression, and Stress

Neurological Disorders

Psychological Disorders

Filters