Which of the following hormones are tropic hormones? (Select one that doesn't apply.)

Rationale

Antidiuretic hormone is not a tropic hormone.

Tropic hormones are those that stimulate other endocrine glands to release their hormones. Antidiuretic hormone (ADH), primarily involved in regulating water balance in the body, does not fit this classification, as its primary function is not to stimulate other glands.

A (Somatotropin) YOUR ANSWER

Somatotropin, also known as growth hormone, has tropic effects because it stimulates the liver and other tissues to produce insulin-like growth factor 1 (IGF-1), which promotes growth and development. Therefore, it qualifies as a tropic hormone due to its role in stimulating other hormones.

B (Follicle-stimulating hormone) YOUR ANSWER

Follicle-stimulating hormone (FSH) is considered a tropic hormone as it stimulates the gonads (ovaries and testes) to produce sex hormones and gametes (eggs and sperm). Its role in regulating reproductive processes categorizes it clearly as a tropic hormone.

C (Antidiuretic hormone) CORRECT

Antidiuretic hormone (ADH), also known as vasopressin, primarily functions to regulate water retention in the kidneys, influencing urine concentration and blood pressure. Unlike tropic hormones, ADH does not stimulate other endocrine glands to secrete hormones, thus making it the correct choice for the one that doesn't apply.

D (Thyroid-stimulating hormone) YOUR ANSWER

Thyroid-stimulating hormone (TSH) is a classic example of a tropic hormone, as it stimulates the thyroid gland to produce thyroid hormones (T3 and T4), which regulate metabolism. Its primary role in activating another gland confirms its classification as a tropic hormone.

Conclusion

Tropic hormones are crucial for regulating the functions of other endocrine glands, and they play vital roles in various physiological processes. In this context, antidiuretic hormone stands out as the only hormone listed that does not stimulate another gland, as its main function is to manage water balance rather than influence hormone production in other tissues. Hence, understanding the distinctions between these hormones is essential for comprehending endocrine system dynamics.

Which of the following hormones are tropic hormones? (Select one that doesn't apply.)

Antidiuretic hormone is not a tropic hormone.

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