Norepinephrine acts on the heart by ________.
A) decreasing heart contractility
B) causing a decrease in stroke volume
C) blocking the action of calcium
D) causing threshold to be reached more quickly
Answer: D
Norepinephrine acts on the heart by ________.
A) decreasing heart contractility
B) causing a decrease in stroke volume
C) blocking the action of calcium
D) causing threshold to be reached more quickly
Answer: D