Biology A-Level
SAN
What SAN means in Biology A-Level, as defined for OCR.
Definition of SAN
Check what you remember
Read the wording for your board, then hide it and explain SAN in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
In the right atrial wall, acts as the pacemaker, spontaneously generating impulses that spread across the atria, causing atrial contraction.
Topics that use SAN
- 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 SAN in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
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