The branch of the autonomic nervous system that prepares the body for quick action in an emergency is the ______ division

The average age of menarche for girls of normal weight is 15 years 6 months

Indicate whether this statement is true or false.

A research participant hears a tone followed by a puff of air directed toward his eye. Later, he blinks when he hears the tone. Before ending the experiment, what should the researcher do to extinguish the blinking to that tone?

a) increase the loudness of the tone b) present the tone alone repeatedly c) present the puff of air alone repeatedly d) increase the amount of air that is directed toward the eye