The blood level of the brain gets the messeage and sends a releasing factor for_________ to the ________ gland.

To answer this question, we need to understand the function of the brain and its communication with the endocrine system.

The brain is responsible for regulating various bodily functions, including hormone secretion. It communicates with the endocrine system through a complex network of neurons and endocrine glands.

In this particular case, we are looking for the releasing factor that is sent by the brain to a specific gland. To identify this gland, we need to understand which gland is involved in hormone secretion and affected by the blood level of the brain.

One of the major glands in the endocrine system is the pituitary gland, also known as the "master gland." It is located at the base of the brain, just below the hypothalamus. The pituitary gland secretes several hormones that regulate various functions in the body, including growth, reproduction, and metabolism.

To regulate the secretion of hormones by the pituitary gland, the hypothalamus, a region of the brain, releases specific releasing factors or hormones into the bloodstream. These releasing factors then travel through the blood vessels to the pituitary gland.

Therefore, in the given question, the releasing factor is sent by the hypothalamus to the pituitary gland.