Chapter 01

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

a. True

b. False

ANSWER: False

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

a. True

b. False

ANSWER: True

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

a. True

b. False

ANSWER: True

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

a. True

b. False

ANSWER: True

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

a. True

b. False

ANSWER: True

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

a. True

b. False

ANSWER: True

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

a. True

b. False

ANSWER: False

8. Glial cells transmit information across long distances.

a. True

b. False

ANSWER: False

9. 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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Chapter 01

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a. True

b. False

ANSWER: False

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

a. True

b. False

ANSWER: False

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

a. True

b. False

ANSWER: True

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

a. True

b. False

ANSWER: True

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

a. True

b. False

ANSWER: False

14. 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.

a. True

b. False

ANSWER: False

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

a. True

b. False

ANSWER: False

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

a. neurons and glia

b. dendrites and axons

c. ribosomes and lysosomes

d. neurons and axons

ANSWER: a