Professor Cook is lecturing on the importance of the myelin sheath. He told that class that _____.
A. myelin is the only structure that can prevent action potentials from traveling the wrong direction.
B. the fatty nature of the myelin speeds up the action potential down the length of the axon
C. the fatty nature of myelin provide storage for key nutrients for the neuron
D. myelin increases the strength of the action potential
Answer: B
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Dr. Chapin has just finished a delicate brain operation. He turns to a group of interns and says, "She probably lost about 1,000 __________, but since she still has over 100 billion left, she should recover nicely."
A. medullary cells B. neurons C. dendrites D. mammillary bodies
Juda has been diagnosed with attention-deficit/hyperactivity disorder (ADHD). He has an extremely short attention span and cannot focus at school. Which of the following treatments can be used to improve Juda's attention and conduct?
A. A stimulant B. A depressant C. A hallucinogen D. A tranquillant
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