This image shows structures of the hypothalamus and the pituitary gland in the human brain. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert!

Low levels of progesterone and estrogen cause the hypothalamus to send a releasing hormone (GnRH) to the pituitary gland. The releasing hormone signals the pituitary gland to release FSH (follicle ...

Save guides, add subjects and pick up where you left off with your BBC account. The control of thyroxine levels by the hypothalamus and pituitary gland is an example of negative feedback.

The pituitary gland is protected and housed by the sella turcica or bony structure that does not leave much room for any expansion. The hypothalamus, the part of the brain that sits just above the ...

The thyroid gland produces two thyroid hormones, triiodothyronine (T3) and thyroxine (T4), and releases them as needed by the body. The hypothalamus and the pituitary gland help control the thyroid ...

Low levels of progesterone and estrogen cause the hypothalamus to send a releasing hormone (GnRH) to the pituitary gland. The releasing hormone signals the pituitary gland to release FSH (follicle ...