- A Prohormones
- B Hormones
- C Enzymes
- D Vitamins
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Answer:
A
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Prohormones are inactive precursors of hormones that are secreted by endocrine glands. These prohormones are then modified into active hormones by various enzymes in the body. For example, proinsulin is a prohormone that is secreted by the pancreas, and it is later processed into insulin, an active hormone that regulates blood sugar levels. Similarly, pro-opiomelanocortin (POMC) is a prohormone that is produced by the pituitary gland and later processed into several active hormones, including melanocyte-stimulating hormone (MSH) and beta-endorphins.
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