Which of the following hormones does NOT belong to the list of pituitary secretions?

The hormone that does not belong to the list of pituitary secretions is ghrelin. Ghrelin is primarily produced in the stomach and plays a significant role in hunger regulation and appetite stimulation. It is often referred to as the "hunger hormone" because it signals the brain to initiate feelings of hunger.

On the other hand, the hormones TSH (Thyroid Stimulating Hormone), LH (Luteinizing Hormone), and ADH (Antidiuretic Hormone) are all produced by the pituitary gland. TSH stimulates the thyroid gland to produce thyroid hormones, LH is involved in regulating the menstrual cycle and ovulation in females and testosterone production in males, while ADH regulates water balance in the body by controlling the amount of water reabsorbed by the kidneys. This distinction clarifies that while other options are all hormones secreted by the pituitary gland, ghrelin is unique in being secreted by the gastrointestinal tract.