d) jerking away from a painful stimulusANS regulates body processes that do not require conscious control. The ANS carries impulses b/w smooth and cardiac muscle and the CNSRe: D- reacting to a painful stimulus is a reflex action under involuntary control. However, reflex actions are controlled by skeletal muscles- this is therefor NOT regulated by the ANSNOT A- b/c digestion is an involuntary process involving the smooth muscle of the stomach and intestions and glandular secretions(FOR MORE INFO SEE P211)