Biology A-Level
AVN
What AVN means in Biology A-Level, as defined for OCR.
Definition of AVN
Check what you remember
Read the wording for your board, then hide it and explain AVN in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
Receives the impulse and introduces a delay, allowing the atria to finish emptying before the ventricles contract.
Topics that use AVN
- Transport in animals (OCR A-Level)
Related terms
- Association and dissociation of oxygen
- Carbon dioxide transport forms
- Control of blood distribution by arterioles
- cooperative binding
- double circulation
- Exchange at capillaries and return of blood in veins
- Heart anatomy
- Heart rate and rhythm interpretation
Using AVN in the exam
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