In today's class, Dr. Gewirtz described the neural impulse (or action potential) and neural communication from the pre-synaptic cell to the post-synaptic receptor. You can find terrific animations of this process on YouTube. I have one that I'd like to share with you, but I can't embed it (because embedding was disabled.) So, I'll use a screenshot and import some visual interest and post THIS LINK to the video on YouTube. Click on the link and bingo!
This video shows the stages of neural communication:
1) the dendrites receiving an electrical impulse,
2) (about 10 second in) the electrical impulse racing down the axon, negative ions leaving the cell
3) (around 18 secs) positive ions entering the axon;
4) (around 31 seconds) the message reaching the terminal field and the release of neurotransmitters from the synaptic vesicles into the synapse;
5) the neurotransmitters reaching the post-synaptic receptors.
It does not illustrate the final step in neural transmission, that of the clearance of the neurotransmitter from the synapse either through recycling/reabsorption or through degradation via enzymes. Does this video help you visualize the process?
By the way, has it occurred to you that you are learning the British pronunciations for these processes (and sometimes the British term?) thanks to our British professor?