Acting Alone, Epinephrine and Thyroid Hormone Each Stimulates Release of Only

Multiple Choice

Acting alone, epinephrine and thyroid hormone each stimulates release of only a small amount of fatty acids from adipose cells. In the presence of thyroid hormone, epinephrine causes a much more substantial release of fatty acids from the cells. What is the term describing the effect of thyroid hormone on epinephrine's actions?

A) antagonistic
B) agonistic
C) permissive
D) direct
E) paracrine