Information transmission in the body goes through a process called synapse (which is the nervous system) which allows a single cell in the body to pass information to the next cell until it reaches the brain. The brain helps human beings to make a decision from a simple motor reflex which calls for neuron to communicate with one another. The body of a human being uses nerve cells to communicate within the body system. There are two processes which are involved in the transmission of information through nerve cells in the body; the two processes are presynaptic and postsynaptic. The brain is the organ which processes information and portray its meaning to the whole body.
In presynaptic, the nerve cells detect an action potential in the body and pass it on through the other nerve cells pushing it towards the brain (Stefan, 2017). The whole channel of transmitting the action potential throughout the body to the brain involves multiple nerve cells. At this stage, the action potential does not really have a clear meaning to the body system. When this action potential finally gets to the brain system, it is processed to have a meaning. The processed information is then transmitted back through the nerve cells to the whole body giving clear information of the action potential (Stefan, 2017). This process of reverting processed information to the body is the one referred to as postsynaptic.
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For instance, when one is hit by a stone, he or she does not feel pain on that immediate moment the stone hits him or her. The nerve cells collect this action potential and quickly pass it on through other nerve cells to the brain. The brain then processes the action potential very quickly and sents back signals of pain to the body through the same nerve cells and that is when one feels pain. The two processes of transmitting the action potential to the brain and the processed information back to the body parts takes extremely little time.
References
Stefan, V. (2017). How do presynaptic and postsynaptic neurons work? (Online). Retrieved from https://socratic.org/questions/how-do-presynaptic-and-postsynaptic-neurons-work
