Question 1

Neurons are distinguished from other cells by their shape.

Accepted Answer

A) True 
 B)False

Question 2

Dr. McLaughlin's lab studies how newly formed proteins are folded inside neurons. They would be most interested in studying the _____.

Accepted Answer

A)   endoplasmic reticulum
B)   mitochondria
C)   ribosomes
D)   nucleusE) B) and C)
F) A) and D)

Question 3

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 barrierE) B) and D)
F) All of the above

Question 4

A presynaptic terminal is also known as ____.

Accepted Answer

A)   an end bulb
B)   a node of Ranvier
C)   myelin
D)   a spineE) A) and B)
F) None of the above

Question 5

Small, charged molecules can cross the cell membrane through ____.

Accepted Answer

A)   diffusion
B)   ribosomes
C)   mitochondria
D)   protein channelsE) A) and C)
F) B) and C)

Question 6

Neurons receive information and transmit it to other cells.

Accepted Answer

A) True 
 B)False

Question 7

Professor Xi studies the _____ located on the _____ of neurons in order to better understand how messages are received by the neuron.

Accepted Answer

A)   synaptic receptors; dendrites
B)   axons; somas
C)   synaptic hillocks; dendrites
D)   synaptic receptors; somasE) B) and C)
F) All of the above

Question 8

____ in the brain and spinal cord and ____ in the periphery are specialized types of glia that build the myelin sheaths that surround neurons.

Accepted Answer

A)   Oligodendrocytes; Schwann cells
B)   Schwann cells; oligodendrocytes
C)   Microglia; oligodendrocytes
D)   Radial glia; Schwann cellsE) B) and C)
F) C) and D)

Question 9

Describe the key aspects of the resting potential.

Accepted Answer

All parts of a neuron are covered by a m...

Question 10

There are two types of glial cells that produce myelin sheath. In the central nervous system, Schwann cells fulfill this role and, in the periphery, oligodendrocytes produce it.

Accepted Answer

A) True 
 B)False

Question 11

What is the role of the myelin sheath? Describe the two types of cells that make the myelin sheath.

Accepted Answer

Myelin sheath is a fatty substance produ...

Question 12

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 cellE) A) and B)
F) A) and C)

Question 13

Nettie is in the laboratory working with cultured neurons. She wants to record the voltage following the opening of the sodium channels. What does she need to do to get the sodium channels to open?

Accepted Answer

A)   Add a solution that will result in depolarizing the membrane.
B)   Add a solution that will result in hyperpolarizing the membrane.
C)   Increase the amount of sodium outside of the neuron.
D)   Produce an action potential and get to the refractory periods.E) None of the above
F) A) and D)

Question 14

During the relative refractory period, the ____.

Accepted Answer

A)   sodium gates are firmly closed
B)   sodium gates are reverting to their usual state
C)   sodium gates are wide open
D)   potassium gates are firmly closedE) B) and C)
F) A) and D)

Question 15

Many dendrites contain short outgrowths called spines that _____.

Accepted Answer

A)   increase the surface area available for synapses
B)   increase the speed of transmission
C)   eliminate cell waste products
D)   increase the symmetry of the somaE) A) and C)
F) C) and D)

Question 16

At the resting potential, the potassium channels are completely closed and the sodium channels are almost closed.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following describes the transmission of information in a local neuron?

Accepted Answer

A)   The signal decreases in strength as it travels.
B)   The signal increases in strength as it travels.
C)   The signal strength remains constant as it travels.
D)   Local neurons do not transmit any information.E) A) and B)
F) All of the above

Question 18

The concentration gradient refers to the ____.

Accepted Answer

A)   fact that the concentration of ions is greater on the inside of a neuron
B)   fact that the concentration of ions is greater on the outside of a neuron
C)   difference in distribution for various ions between the inside and outside of the membrane
D)   negatively charged proteins inside the cellE) All of the above
F) A) and C)

Question 19

The insulating material that covers many vertebrate axons is called the ____.

Accepted Answer

A)   dendrite
B)   myelin sheath
C)   cell body or soma
D)   presynaptic terminalE) B) and C)
F) A) and D)

Question 20

Dr. Blanchard is giving a lecture about the propagation of the action potential. What would she tell the class?

Accepted Answer

A)   That the process of an action potential repeats itself over and over down the length of the axon thanks to the diffusion of sodium ions.
B)   That the process of an action potential repeats itself over and over down the length of the axon thanks to the diffusion of potassium ions.
C)   The action potential moves down the length of the axon because all the sodium channels open all at once after the neuron reaches threshold.
D)   The action potential moves down the length of the axon because all the potassium channels open all at once after the neuron reaches threshold.E) None of the above
F) A) and C)

Exam 1: Nerve Cells and Nerve Impulses

Small, charged molecules can cross the cell membrane through ____.

Correct AnswerverifiedShow Answer

Neurons receive information and transmit it to other cells.

Correct AnswerverifiedShow Answer

Professor Xi studies the _____ located on the _____ of neurons in order to better understand how messages are received by the neuron.

Correct AnswerverifiedShow Answer

Korsakoff's syndrome ____.

Correct AnswerverifiedShow Answer

During the relative refractory period, the ____.

Correct AnswerverifiedShow Answer

____ in the brain and spinal cord and ____ in the periphery are specialized types of glia that build the myelin sheaths that surround neurons.

Correct AnswerverifiedShow Answer

Neurons are distinguished from other cells by their shape.

Correct AnswerverifiedShow Answer

Many dendrites contain short outgrowths called spines that _____.

Correct AnswerverifiedShow Answer

Dr. Blanchard is giving a lecture about the propagation of the action potential. What would she tell the class?

Correct AnswerverifiedShow Answer

Which of the following describes the transmission of information in a local neuron?

Correct AnswerverifiedShow Answer

The concentration gradient refers to the ____.

Correct AnswerverifiedShow Answer

Describe the key aspects of the resting potential.

Correct AnswerverifiedAll parts of a neuron are covered by a m...View AnswerShow Answer

A presynaptic terminal is also known as ____.

Correct AnswerverifiedShow Answer

At the resting potential, the potassium channels are completely closed and the sodium channels are almost closed.

Correct AnswerverifiedShow Answer

The insulating material that covers many vertebrate axons is called the ____.

Correct AnswerverifiedShow Answer

Dr. McLaughlin's lab studies how newly formed proteins are folded inside neurons. They would be most interested in studying the _____.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Nettie is in the laboratory working with cultured neurons. She wants to record the voltage following the opening of the sodium channels. What does she need to do to get the sodium channels to open?

Correct AnswerverifiedShow Answer

There are two types of glial cells that produce myelin sheath. In the central nervous system, Schwann cells fulfill this role and, in the periphery, oligodendrocytes produce it.

Correct AnswerverifiedShow Answer

What is the role of the myelin sheath? Describe the two types of cells that make the myelin sheath.

Correct AnswerverifiedMyelin sheath is a fatty substance produ...View AnswerShow Answer

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Professor Xi studies the _ located on the _ of neurons in order to better understand how messages are received by the neuron.

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in the brain and spinal cord and in the periphery are specialized types of glia that build the myelin sheaths that surround neurons.

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All parts of a neuron are covered by a m...
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Myelin sheath is a fatty substance produ...
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