Question

cross section of the brain
Located in the forebrain, the (A)__________ is responsible for controlling homeostasis and making adjustments in how the organs work. While the rest of the brain is protected from viruses, bacteria, toxins, and hormones in the blood, this part of the brain is not protected by the blood-brain (B)__________.

What is the name for the area of the forebrain that is exposed to the bloodstream and controls homeostasis?
Hint: this part of the brain also controls thirst, hunger, and sexual behavior.