AP Biology Unit 4 Visual Review

An 8-slide picture walkthrough of Cell Communication & Cell Cycle — the four types of cell signaling, signal transduction stages, receptor types, feedback loops, the phases of the cell cycle, and mitosis.

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AP Biology Unit 4 Visual Review slide 1 — Four types of cell signaling: direct, paracrine, synaptic, endocrine

AP Biology Unit 4 Visual Review slide 2 — Three stages of signal transduction: reception, transduction, response

AP Biology Unit 4 Visual Review slide 3 — Receptor types: GPCRs, RTKs, ligand-gated channels, intracellular receptors

AP Biology Unit 4 Visual Review slide 4 — Second messengers and phosphorylation cascades

AP Biology Unit 4 Visual Review slide 5 — Negative feedback vs positive feedback loops

AP Biology Unit 4 Visual Review slide 6 — Phases of the cell cycle: G1, S, G2, M

AP Biology Unit 4 Visual Review slide 7 — Stages of mitosis: prophase, metaphase, anaphase, telophase

AP Biology Unit 4 Visual Review slide 8 — Cell cycle checkpoints, p53, and cancer

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How to use the visual review

Spend 30 seconds per slide before clicking next. Look at the diagram, then ask yourself: "Could I draw this from memory and explain it?"

Use the fullscreen button (⛶) on desktop for the best experience. Use arrow keys to navigate. Tap "Show all slides" to jump around.

This is great for review the night before the exam — fast, visual, and covers everything you need to remember about Unit 4's signaling and cell cycle content.