Stimulation of alpha-adrenergic receptors results in .
Select one:
a. constriction of the blood vessels.
b. dilation of the blood vessels.
c. increased heart rate.
d. increased cardiac contractility.

so whats the answer

c.           is the correct answer

option d : from a warmer substance to a cooler substance

according to second law of thermodynamic, heat flows from higher to lower temperature region. heat is the transfer of energy from an object at higher temperature to an object at a lower temperature. so energy flows from warmer to colder objects.