A protein is found in blood that is produced by the pancreas and acts on receptors of cells in the liver.What type of physiological regulator is it most likely to be?
A)A hormone
B)An autocrine signal
C)A paracrine signal
D)A neurotransmitter
E)An enzyme

Question

A protein is found in blood that is produced by the pancreas and acts on receptors of cells in the liver.What type of physiological regulator is it most likely to be?
A)A hormone
B)An autocrine signal
C)A paracrine signal
D)A neurotransmitter
E)An enzyme

Quizplus · Accepted Answer

The protein is produced by the pancreas and acts on receptors of cells in a different organ (the liver), which suggests that it is a hormone - a signaling molecule that is secreted into the bloodstream and carries a message to distant target cells.

A Protein Is Found in Blood That Is Produced by the Pancreas