Although Ephedra Was Classified as a Complimentary or Alternative Medication

Although ephedra was classified as a complimentary or alternative medication (CAM) , this medication was taken off the market because it can produce serious side effects by

A) stimulating beta-1 receptors on the heart
B) blocking beta-1 receptors on the heart
C) stimulating beta-2 receptors on the lungs
D) blocking beta-2 receptors on the lungs
E) stimulating alpha-2 receptors in the spinal cord