Compared to an ionotropic receptor cell,a metabotropic receptor cell is more likely to have a A) greater sensitivity to stimuli. B) larger membrane surface area. C) ligand-gated Na⁺ channel receptor protein. D) receptor protein that is a G protein or activates one. E) receptor protein that always directly generates an action potential.

Question

Quizplus · Accepted Answer

Metabotropic receptor cells have receptors that are typically G protein-coupled or activate G proteins, which can then activate secondary messenger systems to produce a cellular response. This is different from ionotropic receptors, which directly open or close ion channels upon binding of their ligand. As a result, metabotropic receptors can have a more complex and longer-lasting response compared to ionotropic receptors, but may also be slower to respond initially.

Compared to an Ionotropic Receptor Cell,a Metabotropic Receptor Cell Is