- Peptide hormone : A class of chemical messengers, secreted into the blood from endocrine cells, that bind to specific receptors expressed on the plasma membrane of target cells.
- Adipocyte : Cell that stores fat and makes it available for use as energy.
- Appetite : The desire to eat food, experienced as hunger, and in mammals controlled by neural circuits in the hypothalamus.
- Hunger : Localized subjective sensation, caused by emptiness and a resulting hypermotility of the stomach.
- Ghrelin : A hormone produced by P/D1 cells lining the fundus of the human stomach that stimulate appetite.
- Arcuate nucleus : An aggregation of neurons in the mediobasal hypothalamus with important roles in appetite regulation and in the control of growth hormone secretion and prolactin secretion.
- Hypothalamus : A part of the mammalian brain located below the thalamus, forming the major portion of the ventral region of the diencephalon.