Billy is a four-year-old boy. He has trouble walking and running like other children his age, and he sleeps through most of the day. He is diagnosed with multiple sclerosis. Billy's condition is the result of _____.

A. the abnormal lengths of the axons
B. a disruption in his myelin sheaths
C. the presence of an extra copy of chromosome 21
D. a disruption in his rapid eye movement sleep

Answer: B

Psychology

You might also like to view...

According to Latane, why would a police officer have more influence or impact than a mail carrier?

a. Police are armed. b. Police have higher status, and are thus more influential. c. Mail carriers are more anonymous. d. Police are authorities that must be obeyed.

Psychology

Which memory situation is easiest?

A) recognizing a person in a picture B) remembering where you met a person in a picture C) remembering the name of a person in a picture D) remembering on what day you met a person in a picture

Psychology