Biology A-Level
SAN as intrinsic pacemaker
What SAN as intrinsic pacemaker means in Biology A-Level, as defined for OCR.
Definition of SAN as intrinsic pacemaker
Check what you remember
Read the wording for your board, then hide it and explain SAN as intrinsic pacemaker in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
The sinoatrial node in the right atrium acts as the pacemaker and fires without nervous input, setting the intrinsic rhythm.
Topics that use SAN as intrinsic pacemaker
- Plant and animal responses (OCR A-Level)
Related terms
- Adrenaline and fight-or-flight
- Autonomic control of heart rate
- Autonomic nervous system
- Auxin
- Auxin (IAA)
- Auxins
- Cerebrum
- Comparison of muscle tissue types
Using SAN as intrinsic pacemaker in the exam
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