The nervous system controls how the body responds to internal and external stimuli through voluntary and involuntary actions. Correct answer: B
The nervous system can be divided into two major regions: the central nervous system (CNS): the brain and spinal cord and peripheral nervous systems (PNS): everything else. Voluntary are conscious responses like contraction of skeletal muscle, while involuntary are unconscious like contraction of smooth muscles, regulation of cardiac muscle, activation of glands..