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AP Bio: IST‑3 (EU), IST‑3.C (LO), IST‑3.C.1 (EK), IST‑3.C.2 (EK), IST‑3.D (LO), IST‑3.D.1 (EK), IST‑3.D.2 (EK), IST‑3.E (LO), IST‑3.E.1 (EK)
Types of signaling molecules and the receptors they bind to on target cells. Intracellular receptors, ligand-gated ion channels, G protein-coupled receptors, and receptor tyrosine kinases.