Sudden, veryintense periods of anxietyare known as

What property of some brain cells led scientists to call them mirror neurons?

a. They only fire when a person of animal looks in a mirror. b. Their cell membranes contain a protein that makes them reflect light. c. Their structure perfectly mirrors the structure of a neighboring neuron. d. They fire when a person or animal observes others carrying out an action.

The 10-year rule states that it generally takes 10 years to

a. decide which sport a child prefers. b. reach the expert level in sports, but not in other domains such as music or chess. c. tire of a sport. d. reach the expert level in any domain.