Textbook Problem

People with severe insect-sting allergies carry an EpiPen, an autoinjector containing medication that they can use in an emergency. The medication causes smooth muscles in the lung passages to relax so they can breathe, but causes their hearts to pound rapidly. This is an example of stimulation of the:

a. parasympathetic system.

b. sympathetic system.

c. somatic nervous system.

d. limbic system.

e. voluntary system.