Question

bob witnesses an auto accident and impulses from the ______________ division of the autonomic nervous system increase his heart rate.
a parasympathetic
b sympathetic
c cranial
d spinal

Explanation:

The sympathetic division of the autonomic nervous system is responsible for the "fight - or - flight" response. When a person witnesses an accident (a stressful or threatening situation), the sympathetic nervous system activates. It increases heart rate, among other physiological changes like dilating pupils, increasing blood pressure, and redirecting blood flow to muscles. The parasympathetic division is for "rest - and - digest" (it would decrease heart rate). The cranial and spinal are parts of the central nervous system (not the autonomic nervous system's divisions relevant here).

Answer:

B. sympathetic