Final answer:
Receptors in cell signaling are different from receptors that activate a reflex arc. In cell signaling, receptors are proteins embedded in the plasma membrane of target cells or found in the cell cytoplasm that bind to specific ligands. The binding of ligands to receptors initiates a cascade of events called signal transduction, which leads to a response in the cell.
Step-by-step explanation:
Receptors in cell signaling are different from receptors that activate a reflex arc. In cell signaling, receptors are proteins embedded in the plasma membrane of target cells or found in the cell cytoplasm that bind to specific ligands. The binding of ligands to receptors initiates a cascade of events called signal transduction, which leads to a response in the cell. On the other hand, receptors that activate a reflex arc are specialized cells that detect specific stimuli and generate nerve impulses that result in a reflex response. These receptors include free nerve endings, which can respond to multiple stimuli, and specialized sensory receptors, which detect a specific stimulus.