Tuesday, February 10, 2009
Save the world
okay i shall regurgitate what i revised today for my biology test tmrw! okay la, just a small part
at the synapse, there are two main structures involved. the pre-synaptic neurone and the post-synaptic one. when the action potential arrives at the pre-synaptic neurone, this triggers a depolarization in excess of -55mv. This causes the voltage gated calcium channels to open up. Then, the vesicles containing neurotransmitters such as acetylcholine are launched out, and they bond to the receptors in the membrane of the post synaptic neurone. The arrival of the neurotransmitter triggers the opening of the ligand-gated sodium channels, resulting in a influx of sodium ions into the post-synaptic neurone, and therefore triggering a depolarization, and hence an action potential.
Wooo bio is fun! but im not sure if every school learns the stuff above, my friend in Zhonghua doesn't so...idk. but its super fun. haha
Benjamin
Happy belated birthday, Kelly!