Neurons have a distinct ability to communicate with other cells using a cluster of fibers called __________

Which of the following figures best approximates the proportion of Americans who will experience PTSD at some point?

a) 1-2% b) 4-5% c) 7-8% d) 14-15%

Type B personality is characterized by competitiveness, high ambition, hostility, and irritability

Indicate whether the statement is true or false.