Nominal variables, but not rank-order or equal-interval variables, are examples of __________

One neuron sends a signal to another neuron by

A) an electrical current B) using sodium ions C) releasing a transmitter chemical D) mechanical pressure on it

When Anna uses Legos to build a playhouse, or puts a puzzle together, this is an example of

a) functional play. b) parallel play. c) constructive play. d) associative play.