1) Ears 1) Sensory system components 
see insulin receptors.
Organs which may consist of one cell or a small group of cells which respond to different forms of external or internal stimuli by conveying impulses down nerves to the central nervous system, alerting it to changes in the internal and external environment.
Cells capable of detecting changes or stimuli in the internal or external environment of an organism; in humans the receptors for sight, taste and smell are of particular importance to food manufacturers.
(Humans as organisms) organs which recognize and respond to stimuli
proteins that can bind to other specific molecules. Usually on the surface of a cell, receptors often bind to antibodies or hormones.
special cells that respond to input of the senses
Receptors are structures on the surface of cells. When a receptor meets a particular substance, it triggers a reaction in the cell. The receptor is like a lock and the substance like a key. Each substance only locks on to its specific receptor. There are many different receptors. Each causes different reactions in the cell. For example, some make...