Question 1

What are the two kinds of cells in the nervous system?

Accepted Answer

A)  neurons and glia 
B)  dendrites and axons 
C)  ribosomes and lysosomes 
D)  neurons and axons 
A)  neurons and glia 
B)  dendrites and axons 
C)  ribosomes and lysosomes 
D)  neurons and axons

Question 2

Saltatory conduction ____ the velocity of action potentials and ____ the amount of energy used by the neuron.

Accepted Answer

A)  decreases; decreases 
B)  decreases; increases 
C)  increases; decreases 
D)  increases; increases 
A)  decreases; decreases 
B)  decreases; increases 
C)  increases; decreases 
D)  increases; increases

Question 3

The tree-like branches of a neuron that receive information from other neurons are called:

Accepted Answer

A)  axons. 
B)  dendrites. 
C)  soma. 
D)  myelin. 
A)  axons. 
B)  dendrites. 
C)  soma. 
D)  myelin.

Question 4

If all of a neuron's dendrites or axons were contained within the spinal cord, it would be considered a(n) ____ neuron.

Accepted Answer

A)  efferent 
B)  afferent 
C)  intrinsic 
D)  Purkinje 
A)  efferent 
B)  afferent 
C)  intrinsic 
D)  Purkinje

Question 5

The blood-brain barrier is made up of closely packed glial cells.

Accepted Answer

A) True 
 B)False

Question 6

Korsakoff's syndrome:

Accepted Answer

A)  is marked by severe memory impairments. 
B)  results from too much thiamine. 
C)  results from lack of oxygen to the brain. 
D)  is due to a breakdown of the blood-brain barrier. 
A)  is marked by severe memory impairments. 
B)  results from too much thiamine. 
C)  results from lack of oxygen to the brain. 
D)  is due to a breakdown of the blood-brain barrier.

Question 7

When a neuron's membrane is at rest, the concentration gradient tends to move potassium ____ the cell and the electrical gradient tends to move it ____ the cell.

Accepted Answer

A)  into, into 
B)  into, out of 
C)  out of, into 
D)  out of, out of 
A)  into, into 
B)  into, out of 
C)  out of, into 
D)  out of, out of

Question 8

The action potential of a neuron depends mostly on what movement of ions?

Accepted Answer

A)  sodium ions entering the cell 
B)  sodium ions leaving the cell 
C)  potassium ions entering the cell 
D)  potassium ions leaving the cell 
A)  sodium ions entering the cell 
B)  sodium ions leaving the cell 
C)  potassium ions entering the cell 
D)  potassium ions leaving the cell

Question 9

What happens to the ion gates when the membrane of a neuron starts to be depolarized?

Accepted Answer

A)  Potassium gates close. 
B)  Chloride gates open. 
C)  Sodium gates close. 
D)  Sodium gates open. 
A)  Potassium gates close. 
B)  Chloride gates open. 
C)  Sodium gates close. 
D)  Sodium gates open.

Question 10

When a membrane is at rest, what attracts potassium ions to the inside of the cell?

Accepted Answer

A)  an electrical gradient 
B)  a concentration gradient 
C)  both an electrical gradient and a concentration gradient 
D)  neither an electrical gradient nor a concentration gradient 
A)  an electrical gradient 
B)  a concentration gradient 
C)  both an electrical gradient and a concentration gradient 
D)  neither an electrical gradient nor a concentration gradient

Question 11

A neuron can have any number of ____, but no more than one ____.

Accepted Answer

A)  dendrites; axon 
B)  axons; dendrite 
C)  cell bodies; axon 
D)  cell bodies; dendrite 
A)  dendrites; axon 
B)  axons; dendrite 
C)  cell bodies; axon 
D)  cell bodies; dendrite

Question 12

Neurons can have any number of dendrites, but no more than one axon.

Accepted Answer

A) True 
 B)False

Question 13

An afferent axon brings information into a structure.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following is NOT true of axons?

Accepted Answer

A)  They can vary greatly in length. 
B)  They carry information toward the soma. 
C)  They release chemicals that cross the synapse. 
D)  Some of them are covered with myelin sheaths. 
A)  They can vary greatly in length. 
B)  They carry information toward the soma. 
C)  They release chemicals that cross the synapse. 
D)  Some of them are covered with myelin sheaths.

Question 15

After the peak of an action potential, what prevents sodium ions from continuing to enter the cell?

Accepted Answer

A)  There is no longer a concentration gradient for sodium. 
B)  The sodium-potassium pump greatly increases its rate of activity. 
C)  All the available sodium ions have already entered the cell. 
D)  The sodium gates in the membrane close. 
A)  There is no longer a concentration gradient for sodium. 
B)  The sodium-potassium pump greatly increases its rate of activity. 
C)  All the available sodium ions have already entered the cell. 
D)  The sodium gates in the membrane close.

Question 16

What is saltatory conduction?

Accepted Answer

The jumping of actio

Question 17

The membrane of a neuron is specialized to:

Accepted Answer

A)  keep all types of intercellular chemicals from moving out of the neuron. 
B)  keep all types of extracellular chemicals from moving into the neuron. 
C)  control the exchange of chemicals between the inside and outside of the cell. 
D)  produce chains of fatty acids and proteins. 
A)  keep all types of intercellular chemicals from moving out of the neuron. 
B)  keep all types of extracellular chemicals from moving into the neuron. 
C)  control the exchange of chemicals between the inside and outside of the cell. 
D)  produce chains of fatty acids and proteins.

Question 18

An axon has many branches, each of which swells at its tip. These are known as:

Accepted Answer

A)  presynaptic terminals. 
B)  efferent axons. 
C)  afferent axons. 
D)  intrinsic neurons. 
A)  presynaptic terminals. 
B)  efferent axons. 
C)  afferent axons. 
D)  intrinsic neurons.

Question 19

In what way is a myelinated axon that has lost its myelin (through disease) different from an axon that was never myelinated?

Accepted Answer

A)  It has a smaller diameter. 
B)  It lacks sodium gates along parts of its surface. 
C)  It has a longer refractory period. 
D)  It has a much higher threshold. 
A)  It has a smaller diameter. 
B)  It lacks sodium gates along parts of its surface. 
C)  It has a longer refractory period. 
D)  It has a much higher threshold.

Question 20

Compared to dendrites, axons usually:

Accepted Answer

A)  form the information-receiving pole of the neuron. 
B)  are shorter than the dendrites. 
C)  are covered with myelin. 
D)  taper in diameter toward their periphery. 
A)  form the information-receiving pole of the neuron. 
B)  are shorter than the dendrites. 
C)  are covered with myelin. 
D)  taper in diameter toward their periphery.

What are the two kinds of cells in the nervous system?

Saltatory conduction the velocity of action potentials and the amount of energy used by the neuron.

The tree-like branches of a neuron that receive information from other neurons are called:

If all of a neuron's dendrites or axons were contained within the spinal cord, it would be considered a(n) ____ neuron.

The blood-brain barrier is made up of closely packed glial cells.

Korsakoff's syndrome:

When a neuron's membrane is at rest, the concentration gradient tends to move potassium the cell and the electrical gradient tends to move it the cell.

The action potential of a neuron depends mostly on what movement of ions?

What happens to the ion gates when the membrane of a neuron starts to be depolarized?

When a membrane is at rest, what attracts potassium ions to the inside of the cell?

A neuron can have any number of , but no more than one .

Neurons can have any number of dendrites, but no more than one axon.

An afferent axon brings information into a structure.

Which of the following is NOT true of axons?

After the peak of an action potential, what prevents sodium ions from continuing to enter the cell?

What is saltatory conduction?

The membrane of a neuron is specialized to:

An axon has many branches, each of which swells at its tip. These are known as:

In what way is a myelinated axon that has lost its myelin (through disease) different from an axon that was never myelinated?

Compared to dendrites, axons usually:

The Major Issues

Synapses

Anatomy of the Nervous System

Development and Plasticity of the Brain

Vision

The Other Sensory Systems

Movement

Wakefulness and Sleep

Internal Regulation

Reproductive Behaviors

Emotional Behaviors

The Biology of Learning and Memory

Cognitive Functions

Mood Disorders and Schizophrenia

Filters

Exam 2: Nerve Cells and Nerve Impulses

What are the two kinds of cells in the nervous system?

Saltatory conduction ____ the velocity of action potentials and ____ the amount of energy used by the neuron.

The tree-like branches of a neuron that receive information from other neurons are called:

If all of a neuron's dendrites or axons were contained within the spinal cord, it would be considered a(n) ____ neuron.

The blood-brain barrier is made up of closely packed glial cells.

Korsakoff's syndrome:

When a neuron's membrane is at rest, the concentration gradient tends to move potassium ____ the cell and the electrical gradient tends to move it ____ the cell.

The action potential of a neuron depends mostly on what movement of ions?

What happens to the ion gates when the membrane of a neuron starts to be depolarized?

When a membrane is at rest, what attracts potassium ions to the inside of the cell?

A neuron can have any number of ____, but no more than one ____.

Neurons can have any number of dendrites, but no more than one axon.

An afferent axon brings information into a structure.

Which of the following is NOT true of axons?

After the peak of an action potential, what prevents sodium ions from continuing to enter the cell?

What is saltatory conduction?

The membrane of a neuron is specialized to:

An axon has many branches, each of which swells at its tip. These are known as:

In what way is a myelinated axon that has lost its myelin (through disease) different from an axon that was never myelinated?

Compared to dendrites, axons usually:

The Major Issues

Synapses

Anatomy of the Nervous System

Development and Plasticity of the Brain

Vision

The Other Sensory Systems

Movement

Wakefulness and Sleep

Internal Regulation

Reproductive Behaviors

Emotional Behaviors

The Biology of Learning and Memory

Cognitive Functions

Mood Disorders and Schizophrenia

Filters

Saltatory conduction the velocity of action potentials and the amount of energy used by the neuron.

When a neuron's membrane is at rest, the concentration gradient tends to move potassium the cell and the electrical gradient tends to move it the cell.

A neuron can have any number of , but no more than one .