The vaginal walls are poorly supplied with blood vessels, but rich with nerve endings

The male birds of many species are most likely to learn

A) any birdsong that they hear during the motor phase. B) the songs of their own species that they hear during the motor phase. C) any birdsong that they hear during the sensory phase. D) the songs of their own species that they hear during the sensory phase. E) any birdsong that they hear once they have reached maturity.

A state of physical, emotional, and mental exhaustion caused by long-term involvement in emotionally demanding situations is referred to as:

a. posttraumatic stress disorder b. schizophrenia c. burnout d. general adaptation syndrome