Question

Tumors in an endocrine gland cause unregulated release of the hormone or hormones produced by that gland. It there were a tumor in the endocrine part of the hypothalamus that acts on the anterior pituitary, which of the following would result?

A) Hormone from the third endocrine gland would increase but hormone from the hypothalamus and anterior pituitary would decrease.
B) Only hormones from the anterior pituitary would increase.
C) All hormones in the cascade would increase.
D) None of the hormone levels would be changed because of negative feedback.
E) Hormone from the hypothalamus would decrease, but hormone from the anterior pituitary and third endocrine gland would increase.

Answer 1

Answer: E)

Step-by-step explanation:

When a tumor develops in an endocrine gland, it can cause unregulated release of the hormone or hormones produced by that gland. If there were a tumor in the endocrine part of the hypothalamus that acts on the anterior pituitary, the answer would be E) Hormone from the hypothalamus would decrease, but hormone from the anterior pituitary and third endocrine gland would increase.

The hypothalamus produces and releases hormones that act on the anterior pituitary to regulate the release of hormones from other endocrine glands. If a tumor were to develop in the hypothalamus, it could disrupt the normal feedback loop and cause unregulated release of hormones. In this case, the hormone from the hypothalamus would decrease because the tumor would be disrupting its release. However, the hormone from the anterior pituitary and third endocrine gland would increase due to the disruption of the normal feedback loop.

So, in summary, a tumor in the endocrine part of the hypothalamus that acts on the anterior pituitary would result in a decrease in hormone from the hypothalamus, but an increase in hormone from the anterior pituitary and third endocrine gland.