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?

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Q: 115 (SSC/NA)

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?

question_subject: 

Science

question_exam: 

SSC

stats: 

0,5,9,3,4,5,2

keywords: 

{'source gland': [1, 0, 0, 0], 'secretions': [1, 0, 1, 1], 'saliva': [2, 0, 0, 1], 'epinephrine': [1, 0, 0, 0], 'bile': [2, 0, 0, 0], 'transport': [0, 0, 0, 1], 'sweat': [1, 0, 1, 0]}

The correct answer is option 3, Bile. Bile is different from the remaining three secretions in terms of its mode of transport from the source gland to the site of action. Bile is produced in the liver and stored in the gallbladder. It is then released into the small intestine when needed for the digestion and absorption of fats. Bile travels through the bile ducts to reach the small intestine, where it exerts its actions. On the other hand, saliva, sweat, and epinephrine are secretions that are transported through ducts directly to their respective sites of action. Saliva is produced in the salivary glands and delivered to the mouth to aid in digestion. Sweat is produced in sweat glands and transported to the surface of the skin. Epinephrine, also known as adrenaline, is produced in the adrenal glands and released into the bloodstream to exert its effects throughout the body.