Which pair of hormones has opposite, antagonistic effects?
A) insulin--glucagon
B) insulin--progesterone
C) estrogen--thyroxin
D) thyroxin--parathyroid hormone
E) epinephrine--norepinephrine
A) insulin--glucagon
B) insulin--progesterone
C) estrogen--thyroxin
D) thyroxin--parathyroid hormone
E) epinephrine--norepinephrine