Which one of the following four secretions, is different from the remaining three in regard to its mode of transport from the source gland to the site of action? (1) Saliva (2) Sweat (3) Bile (4) Epinephrine

Which one of the following four secretions, is different from the remaining three in regard to its mode of transport from the source gland to the site of action? (1) Saliva (2) Sweat (3) Bile (4) Epinephrine
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(3) Bile Explanation: Saliva: secreted by the salivary glands; Sweat: achieved by the water-rich secretion of the eccrine glands; Epinephrine: also known as adrenaline is a hormone and a neurotransmitter; and Bile: a bittertasting, dark green to yellowish brown fluid, produced by the liver that aids the process of digestion of lipids in the small intestine. Bile is the odd one among all four as it is secreted by liver, while others are secreted by glands.
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