How do signals cross a synapse

  1. action potential arrives at post synaptic terminal 2. voltage gated calcium channels open 3. calcium enters presynaptic neuron and move to neurotransmitter vesicles 4. vesicles move to membranes and dock 5. exocytosis releases neurotransmitters into synapse 6. neurotranmitters diffuse across synapse and bind to postsynaptic receptors 7. sugnal intiated in postsynaptic membrane
SR

Related Biology A Level answers

All answers ▸

Describe the role of a ribosome in the production of a polypeptide.


Maltase is an enzyme found in the body that breaks down maltose. Explain why maltase can only catalyse this reaction?


The Pacinian corpuscle senses changes in pressure in the skin. Explain how pressure causes the cell to change its membrane potential to elicit a nerve response.


Describe the similarities and differences between haemoglobin and collagen.