If you didn't already know sign language and you observed two deaf persons using signs, you would probably
A) have an easy time deciphering their conversation.
B) understand little to nothing about what was being communicated.
C) have to rely on their facial expressions.
D) be able to join in the conversation after a few minutes.
Answer: B
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Which of the following is TRUE about tobacco use?
a. Nicotine is one of the most addicting drugs one can use. b. Chewing tobacco and snuff are less dangerous than cigarette smoking. c. The rate of cigarette smoking has been declining steadily from 1965 to the present. d. Smoking increases the chances of cancer and heart disease, but doesn't affect the rate of stroke.
Which of the following neural changes involves the growth of fatty tissues that cover the axons that carry nerve impulses from one neuron to other neurons?
A) growth of glial cells B) myelination C) synaptic pruning D) synaptogenesis