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The testosterone level in Brian's blood has dropped below the normal range. Which sequence of events will happen as a result?

A. The pituitary gland secretes the luteinizing hormone (LH), which stimulates the hypothalamus to secrete the gonadotropin-releasing hormone (GnRH). This stimulates the testes to secrete testosterone.

B. The hypothalamus secretes the gonadotropin-releasing hormone (GnRH), which stimulates the pituitary gland to secrete luteinizing hormone (LH). This stimulates the testes to secrete testosterone.

C. The pituitary gland secretes the gonadotropin-releasing hormone (GnRH), which stimulates the hypothalamus to secrete the luteinizing hormone (LH). This stimulates the testes to secrete testosterone.

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Final answer:

When Brian's testosterone levels drop, the hypothalamus releases GnRH, stimulating LH production, which in turn prompts the testes to secrete testosterone, regulated by a negative feedback loop.


Explanation:

The sequence of events when the testosterone level in Brian's blood drops below the normal range is:

  1. The hypothalamus secretes gonadotropin-releasing hormone (GnRH)
  2. GnRH stimulates the pituitary gland to secrete luteinizing hormone (LH)
  3. LH stimulates the testes to secrete testosterone

This process is regulated by a negative feedback loop involving testosterone, GnRH, LH, and FSH to maintain testosterone levels.


Learn more about Testosterone regulation here:

https://brainly.com/question/51098975


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