Final answer:
The gland that secretes hormones to stimulate the pituitary gland is the hypothalamus, and it is involved in basic drives such as hunger, sex, and aggression.
Step-by-step explanation:
The gland that secretes hormones that stimulate the secretion of hormones by the pituitary gland and is involved in basic drives such as hunger, sex, and aggression is the hypothalamus.
The hypothalamus produces releasing and inhibiting hormones that control the secretion of a variety of pituitary hormones. One of the hormones released by the hypothalamus is gonadotropin-releasing hormone (GnRH), which stimulates the anterior pituitary to secrete gonadotropins.
These gonadotropins, including follicle-stimulating hormone (FSH) and luteinizing hormone (LH), regulate the development and function of the reproductive system, including the production of sex hormones like testosterone and estrogen.