What Is the Effect of the Release of Norepinephrine by the Sympathetic

Multiple Choice

What is the effect of the release of norepinephrine by the sympathetic nervous system?

A) Smooth muscle and cardiac muscle relax.
B) Smooth muscle and cardiac muscle are activated and increase the force of their muscle contractions.
C) Smooth muscle relaxes, while cardiac muscle has increased contractile force.
D) Cardiac muscle relaxes, while smooth muscle is stimulated to increase activity.