Biology A (Salters-Nuffield) A-Level
Antagonistic muscle action
What Antagonistic muscle action means in Biology A (Salters-Nuffield) A-Level, as defined for Pearson Edexcel.
Definition of Antagonistic muscle action
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Reference: Pearson Edexcel
The circular and radial iris muscles have opposing contractions: in bright light circular muscle contracts and radial relaxes, and in dim light radial contracts and circular relaxes.
Topics that use Antagonistic muscle action
- Topic 8: Grey Matter (Pearson Edexcel A-Level)
Related terms
- Animal experiments
- Animal models in neuroscience research
- Autonomic control of the pupil
- Benefits
- Cell signalling
- Cerebral hemispheres
- Co-ordination
- Critical period
Using Antagonistic muscle action in the exam
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