Biology A-Level
Unidirectionality
What Unidirectionality means in Biology A-Level, as defined for AQA.
Definition of Unidirectionality
Check what you remember
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Reference: AQA
Transmission is unidirectional as only the presynaptic knob has vesicles and only the postsynaptic membrane has receptors.
Topics that use Unidirectionality
- Synaptic transmission (A-level only) (AQA A-Level)
Related terms
- acetylcholinesterase inhibition
- agonists and antagonists
- excitatory only at the neuromuscular junction
- Inhibitory synapses and hyperpolarisation
- motor end plate
- postsynaptic receptors
- shared transmission mechanism
- stating the direction of change
Using Unidirectionality in the exam
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