____________ chemicals tend to decrease metabolic rate, and ____________ chemicals tend to increase it

Newer local anesthetics are simple modifications of the cocaine molecule that do not pass the blood-brain barrier and thus do not produce cocaine-like feelings of euphoria

Indicate whether the statement is true or false

True babbling begins at approximately

A) 2 months. B) 4 months. C) 6 months. D) 8 months.