a) Explain how an action potential is passed across a synapse b) Label the graph below with the steps of action potential generation c) The graph shows the results of a study on two groups taking different medication, is the difference significant?
a) When an action potential arrives at the presynaptic membrane there is an influx of calcium ions which allows the vesicles containing neurotransmitter to move to and fuse with the presynaptic membrane. The neurotransmitter is released and diffuses across the synaptic cleft binding to voltage gated channels on the post synaptic membrane allowing sodium ions to enter and generate an action potential.b) Includes steps of depolarization and repolarizationc) mentions difference in error bars - if no overlap difference is significant
CK
Related Biology A Level answers
All answers ▸How do the components of a plasma membrane affect the movement of substances into and out of a cell, and why is this regulation important?
A myelinated axon conducts impulses faster than a non-myelinated axon.
Can you explain the oxygen dissociation curve.
Describe the way solutes are transported in a plant's vascular system