Systems integration
How cellular changes propagate to tissue and organ-level effects.
Systems integration is the MCAT's favorite reasoning skill. You must connect a molecular or cellular change to a tissue effect, then to an organ, then to a system-level outcome. This is how passages turn basic biology into clinical reasoning.
- Systems are built from cell-to-tissue organization
- Homeostasis links multiple systems
- System outcomes follow a chain of effects
- Identify the most dependent tissue first
- Avoid answers that skip steps
Choose a cellular defect (ion channel, enzyme, receptor). Write the tissue it affects and one system-level symptom you would expect.
Generate a short quiz from this lesson. Choose the formats you want, then run it.
Use this for step-by-step support. This is learning-first and shows reasoning.
Official MCAT overview from AAMC (link-only).
Official free planning resources (link-only).
Register for the official free MCAT practice exam (link-only).
Official MCAT content outline (link-only).
External Khan Academy MCAT content. Link-only with attribution.
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