Phlebotomist Exam Prep

Answer: C - The nervous system detects changes inside and outside the body and coordinates a response as needed. The nervous system is comprised of special cells called neurons, the brain, spinal cord, the brain and spinal cord coverings, and spinal and brain fluid. Sensory neurons send nerve impulses to the brain from muscle tissue. Motor neurons transmit signal from the brain to muscle tissue; this can be under voluntary or involuntary control.