Ionotropic receptors may let in _______, which can then act as a(n) _______.

Question

Quizplus · Accepted Answer

Ionotropic receptors are membrane-bound receptors that allow ions to flow into the cell when they bind to specific ligands. The ions that typically flow through ionotropic receptors include Na+, K+, Ca2+, and Cl-. Of these ions, Ca2+ is the most likely to act as a second messenger, as it can activate a variety of downstream signaling pathways. Choice C is the only option that includes Ca2+ as an ion, and also mentions second messengers. Therefore, it is the best choice.

Ionotropic Receptors May Let in _______, Which Can Then Act