Since insulin released from the pancreas is carried in the bloodstream to distant target cells,like muscle cells,it is considered to be a(n)
A)local hormone.
B)circulating hormone.
C)paracrine.
D)autocrine.
E)neurotransmitter.

Question

Quizplus · Accepted Answer

Insulin is considered to be a circulating hormone because it is released into the bloodstream and travels to distant target cells throughout the body. Local hormones, such as paracrine and autocrine signaling molecules, act on nearby cells without traveling in the bloodstream. Neurotransmitters are released by neurons and act on adjacent cells, but are not considered hormones.

Since Insulin Released from the Pancreas Is Carried in the Bloodstream