Second Messenger Systems - Integrated MCAT Course

Signal Transduction

Autocrine, Paracrine, and Endocrine Signaling

Cell Surface Receptors

Gated Ion Channels

Catalytic Receptors Employing Receptor Tyrosine Kinase

MAPK Signaling Pathway

Insulin Receptor

Catalytic Receptors Employing Non-Receptor Tyrosine Kinase

JAK-STAT Pathway

G Protein–Coupled Receptors

Intracellular Receptors

Second Messenger Systems

Adenylyl Cyclase

Phospholipase C

Phosphoinositide 3-kinase

Kimball's Biology Pages - Secondary Messengers

Biology LibreTexts - Propagation of the Signal

A worthwhile general discussion of signaling principles that includes a good overview of second messenger systems.

Topic Resources

Interdisciplinary MCAT Course Videos

Conceptual Vocabulary

Images for Teachers

figures for classroom presentation

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