Define the autonomic nervous system sympathetic and parasympathetic

Explanation:

Autonomic nervous system: A part of the nervous system that regulates key involuntary functions of the body, including the activity of the heart muscle; the smooth muscles, including the muscles of the intestinal tract; and the glands.

The autonomic nervous system has two divisions:

the sympathetic nervous system, which accelerates the heart rate, constricts blood vessels, and raises blood pressure, and

the parasympathetic nervous system, which slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles.

Approximately, "more than 50%"  of all employees who participate in group insurance plans work for firms that self-insure.

Explanation:

Self-insurance refers to the practice of setting aside funds to pay for medical care expenses instead of paying premiums to an insurance company. Approximately, more than 50% of all employees who participate in group insurance plans work for firms that self-insure. Self-insurance, it is a state or a condition where a person never takes part in the third party insurance. Basically it means besides paying the money to any insurance company for medical, dental and or vision claims the amount is paid to the self, keeping a third party who can process the claims on the behalf of that person.