A single beat that arises from a focus outside of the SA node is called a(n):

Which afferent nerve fiber transmits painful sensory input?

A) A alpha B) A delta C) C D) B and C

Which of the following is a physiological benefit of achieving and maintaining physical fitness?

A) Increased resting blood pressure B) Increased metabolic rate C) Decreased oxygen-carrying capacity D) Increased resting heart rate