Video from Ninja Nerd on YouTube

5.16.2 Classify receptors (ion channel-linked, G protein-coupled, enzyme-linked, intracellular) and describe the second messenger systems (cAMP, IP3/DAG, calcium).

The part on this line: 2:32–3:10

Why this video

It provides a clear, in-depth explanation of the GPCR signalling cascades—including cAMP, IP3, DAG, and calcium release—alongside intracellular steroid hormone receptor mechanisms.

Part of this line

Covers part of this objective. It leaves out: It does not cover ion channel-linked or enzyme-linked receptors.

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