how electrical currents are passing through the nervous system?

Question

ASAP! PLS!

Answer 1

The nerve cells produce electrical signals through a reaction of Potassium and Sodium in the body.

Answer 2

Both experiments and theoretical studies have shown the need to adopt a multi-level approach to analysing brain function. Even the level of molecular and genetic events can affect the entire central nervous system, and vice versa. Most neuronal modelling has focused on the biophysical level: from currents passing through ion channels up to the level of large assemblies of neurons. This description encompasses many levels of neuronal function, and is the domain of this book. Biophysical models of single neurons are conceptually very simple, and are among the most quantitatively accurate models in biology. Highly accurate models can be constructed by subdividing cells into interconnected ‘compartments’: small cylindrical segments of the neuron, each with its own complement of ion channels. Compartments are represented by an equivalent circuit, which takes into account membrane resistance, capacitance, and ionic conductance. Within each compartment, ion currents are typically described as variable conductances in series with the ionic reversal potential. It is the modulation of these conductances which gives each current its unique character. For example, synaptic currents are often modelled as simple ‘alpha-function’ responses to an action potential, whereas Ca2+-dependent voltage-gated channels may require multiple state variables as well as Ca-concentration information in an extended Hodgkin–Huxley formulation. Network models can be constructed, then, by assembling several single-neuron models and interconnecting them through synaptic conductances.

Answer 3

I believe it is through ionisation of different elements such as Na etc.

Answer 4

Very quickly!