After her friend cursed at her Tina stopped and looked up at the sky, certain that God would send down a lightening bolt to punish her friend. Piaget would say that Tina was exhibiting a belief in:

The fact that a neuron fires an impulse of the same strength whenever its action potential is triggered is called

a. resting potential. c. the refractory period. b. polarization. d. the all-or-none principle.

In studying "psychic secretions," Pavlov focused his attention on the ________

a. dog's thoughts and feelings b. events in the dog's environment c. genetic history of the dog d. behavior of the dog before and after feeding