Biology A-Level
spatial summation
What spatial summation means in Biology A-Level, as defined for AQA.
Definition of spatial summation
Check what you remember
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Reference: AQA
Many rods share a single bipolar neurone, allowing summation of generator potentials, giving high sensitivity in dim light but low acuity.
Topics that use spatial summation
- Receptors (A-level only) (AQA A-Level)
Related terms
- colour vision
- deformation
- depolarisation
- generator potential
- receptor specificity
- stretch-mediated sodium ion channels
- transduction
- visual acuity
Using spatial summation in the exam
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