Ionotropic receptors

Ionotropic receptors are specialized proteins found on cell membranes that act as gateways for ions, such as sodium or calcium, to enter or exit a cell. When a signaling molecule, like a neurotransmitter, binds to these receptors, they quickly change shape, allowing ions to flow through. This movement of ions can trigger various cellular responses, such as muscle contraction or nerve signal transmission. Ionotropic receptors play a crucial role in rapid communication between cells in the nervous system, enabling quick responses to stimuli.