The arching of the back exhibited by a female rat during copulation is known as ______.

Every day you see Ted running as hard as he can. You wonder why he likes to sweat so much and work so hard. When you ask, he tells you he does not feel pain; in fact, he talks about a "runner's high."

A physiological psychologist might attribute this "runner's high" to the effects of a) dopamine.

Menstruation is a natural characteristic of female mammals

a. True b. False