NEET PG DENTAL EXAM

Detailed explanation-1: -ligand-gated channel: A group of transmembrane ion channels that open or close in response to the binding of a chemical messenger (ligand) such as a neurotransmitter.

Detailed explanation-2: -In contrast, most channel proteins in the plasma membrane of animal and plant cells that connect the cytosol to the cell exterior necessarily have narrow, highly selective pores that can open and close. Because these proteins are concerned specifically with inorganic ion transport, they are referred to as ion channels.

Detailed explanation-3: -Voltage-gated ion channels regulate the relative concentrations of different ions inside and outside the cell. The difference in total charge between the inside and outside of the cell is called the membrane potential. Figure 1. Voltage-gated ion channels open in response to changes in membrane voltage.