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1. Dendrites contain the nuclei, ribosomes, mitochondria, and other structures found in most cells.
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a. True
b. False
ANSWER: False i l .
2. Neurons receive information and transmit it to other cells.
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a. True
b. False
ANSWER: True i l .
3. Santiago Ramón y Cajal used special staining techniques to reveal that the brain is composed of individual cells.
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a. True
b. False
ANSWER: True i l .
4. An efferent axon carries information away from a structure.
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a. True
b. False
ANSWER: True i l .
5. The greater the surface area of a dendrite, the more information it can receive from other neurons.
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a. True
b. False
ANSWER: True i l .
6. Neurons are distinguished from other cells by their shape.
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a. True
b. False
ANSWER: True i l .
7. The role of glial cells is to act like ―glue‖ or scaffolding to support the neurons.
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a. True
b. False
ANSWER: False i l .
8. Glial cells transmit information across long distances.
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a. True
b. False
ANSWER: False i l .
9. There are two types of glial cells that produce myelin sheath. In the central nervous system, Schwann cells fulfill this
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role and, in the periphery, oligodendrocytes produce it.
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Name: Class: Date:
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a. True
b. False
ANSWER: False i l .
10. The blood-brain barrier is made up of closely packed glial cells.
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a. True
b. False
ANSWER: False i l .
11. The difference in voltage in a resting neuron is called the resting potential.
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a. True
b. False
ANSWER: True i l .
12. Increasing the electrical gradient for potassium will reduce the tendency for potassium ions to exit the neuron.
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a. True
b. False
ANSWER: True i l .
13. At the resting potential, the potassium channels are completely closed and the sodium channels are almost closed.
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a. True
b. False
ANSWER: False i l .
14. Dr. Skinner is working in the lab measuring the voltage of neurons, and during one condition, she tried to
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depolarize the neurons from -70 mV to -80 mV.
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a. True
b. False
ANSWER: False i l .
15. Action potentials can be produced in the dendrites of some neurons.
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a. True
b. False
ANSWER: False i l .
16. The two basic kinds of cells in the nervous system are
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a. neurons and glia il. il.
b. dendrites and axons il. il.
c. ribosomes and lysosomes il. il.
d. neurons and axons il. il.
ANSWER: a il.
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