Nerve Cells And Nerve Impulses

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Question 1
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 Dendrites contain the nuclei, ribosomes, mitochondria, and other structures found in most cells.

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Question 2
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 Neurons receive information and transmit it to other cells.

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Question 3
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 Santiago Ramón y Cajal used special staining techniques to reveal that the brain is composed of individual cells.

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Question 4
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 An efferent axon carries information away from a structure.

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Question 5
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 The greater the surface area of a dendrite, the more information it can receive from other neurons.

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Question 6
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 Neurons are distinguished from other cells by their shape.

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Question 7
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 The role of glial cells is to act like "glue" or scaffolding to support the neurons.

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Question 8
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 Glial cells transmit information across long distances.

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Question 9
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 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.

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Question 10
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 The blood-brain barrier is made up of closely packed glial cells.

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Question 11
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 The difference in voltage in a resting neuron is called the resting potential.

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Question 12
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 Increasing the electrical gradient for potassium will reduce the tendency for potassium ions to exit the neuron.

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Question 13
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 At the resting potential, the potassium channels are completely closed and the sodium channels are almost closed.

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Question 14
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 Dr. Skinner is working in the lab measuring the voltage of neurons, and during one condition, she tried to depolarize the neurons from -70 mV to -80 mV.

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Question 15
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 Action potentials can be produced in the dendrites of some neurons.

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Question 16
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 The two basic kinds of cells in the nervous system are _____ .

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A
neurons and glia
B
dendrites and axons
C
ribosomes and lysosomes
D
neurons and axons
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Question 17
Multiple Choice

 Santiago Ramon y Cajal demonstrated that ____ .

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A
at rest, the neuron has a negative charge inside its membrane
B
neurons are separate from one another
C
neurons communicate at specialized junctions called synapses
D
action potentials follow the all-or-none law
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Question 18
Multiple Choice

 Both ____ and ____ shared the Nobel Prize for Physiology or Medicine in 1906.

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A
Golgi and Cajal
B
Cajal and Sherrington
C
Sherrington and Golgi
D
Cajal and Kalat
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Question 19
Multiple Choice

 Dr. Kimi studies the plasma membrane of neurons. He specifically researches the specialized _____ that allow in important things like water, oxygen, sodium, and so on.

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A
lipid channels
B
protein channels
C
lipid receptors
D
protein receptors
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Question 20
Multiple Choice

 Neurons differ most strongly from other body cells in their ____ .

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A
temperature
B
shape
C
osmotic pressure
D
mitochondria
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