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describe structure of neuron

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Neurons contain organelles common to many other cells, such as a nucleus and mitochondria. They also have more specialized structures, including dendrites and axons. Once a signal is received by the dendrite, it then travels passively to the cell body.
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Neurons are specialized cells of the nervous system that transmit signals throughout the body. You may already know that neurons can do many different things from sensing external and internal stimuli, to processing information and also directing muscle actions. 

 

 

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In the earlier chapter on nuclear forces I suggested a proton was made of two (positively charged) up-quarks orbiting a (negatively charged) down-quark. It looked like this:

Here the up-quarks are held in place by a simple combination of electrical and centrifugal forces. This layout has the important benefit that the orbiting up-quarks generate sine-wave electromagnetic signals that are 180 degrees out of phase and hence cancel each other. But it also has problems. One is stability: how can we guarantee the up quarks will stay in place and keep the structure from falling apart? The other is ‘quantum mechanical’: what could keep the up-quarks at a fixed distance when any number of orbits altitudes are possible?

In an earlier chapter on atomic orbits, similar problems were discussed regarding the layout of a helium atom and the orbit of its electrons. One possibility considered for helium was having its two electrons stay exactly opposite each other. This is very similar to our proton structure. But it failed for helium so how could it work for a proton? I’ll address each of these problems in turn.

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