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

Rationale

Antidiuretic hormone is not a tropic hormone.

Tropic hormones are those that stimulate other glands to release hormones, while antidiuretic hormone (ADH) primarily regulates water balance in the kidneys and does not stimulate another endocrine gland.

A (Somatotropin) YOUR ANSWER

Somatotropin, also known as growth hormone, is produced by the anterior pituitary and promotes growth and metabolism. While it has direct effects on tissues, it does not primarily function as a tropic hormone, as it does not stimulate another endocrine gland to release hormones.

B (Follicle-stimulating hormone) YOUR ANSWER

Follicle-stimulating hormone (FSH) is a tropic hormone produced by the anterior pituitary that stimulates the gonads—specifically, it promotes the development of ovarian follicles in females and spermatogenesis in males. Thus, it effectively meets the criteria of a tropic hormone.

C (Antidiuretic hormone) CORRECT

Antidiuretic hormone (ADH), also known as vasopressin, is produced in the hypothalamus and released by the posterior pituitary. Its primary role is to regulate water reabsorption in the kidneys rather than stimulating another endocrine gland, which disqualifies it from being a tropic hormone.

D (Thyroid-stimulating hormone) YOUR ANSWER

Thyroid-stimulating hormone (TSH) is produced by the anterior pituitary and stimulates the thyroid gland to produce and release thyroid hormones. This clearly categorizes TSH as a tropic hormone since it directly influences another endocrine gland.

Conclusion

Tropic hormones are characterized by their role in stimulating other glands to produce hormones. In this context, antidiuretic hormone does not fulfill this role, as it primarily regulates bodily functions without acting on another gland. In contrast, somatotropin, follicle-stimulating hormone, and thyroid-stimulating hormone each influence other endocrine glands, making them valid examples of tropic hormones.

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

Antidiuretic hormone is not a tropic hormone.

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