Download Electricity & Chemistry

Electricity & Chemistry
Our Nervous System only works
thanks to electricity!
Electricity & Chemistry


Electricity is the
movement of
electrons from
negative to positive
Electricity creates
an electrical
discharge or an
electrical current
Electricity & Chemistry


(-)
Electrical potential (voltage) is how
much energy can transfer from the
negative side of a battery to the
positive side.
This potential energy is in the form of
electrons
(+)
Electricity & Chemistry

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Potential difference is measured in
Volts
The more potential difference, the
higher the voltage.
1.5 volts
9 volts
6 volts
Electricity & Chemistry
Electricity & Chemistry
In the Human Body


Nerve Cells (called neurons) send
messages around your body
These messages will do everything
from move muscles to produce brain
signals
Electricity & Chemistry

Some Chemicals in the body are
electrically charged (negative or
positive)
JUST LIKE THE BATTERY
Na(+)
Cl(-)
Electricity & Chemistry

The important electrically charged
chemicals for the nervous system are:
– Sodium (positive)
– Potassium (positive)
– Calcium (positive)
– Chloride (negative)
Electricity & Chemistry

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Neurons, when not in use, sit, waiting
to be used
JUST LIKE A BATTERY
The inside of the neuron has a
negative charge, whereas the outside
of the neuron has a positive charge
JUST LIKE A BATTERY
Electricity & Chemistry
Outside of the Nerve Cell
Inside of the Nerve Cell
Electricity & Chemistry
Battery
Nerve Cell
Electricity & Chemistry

Potential Difference
Battery:
Neuron:
1.5 volt – 9 volt
-70 millivolts (mV)
= 0.07 volts
Electricity & Chemistry

As a chemical current flows in or out
of the cell, it creates an increase in
voltage
JUST LIKE A BATTERY
Electricity & Chemistry

The Physics of electricity have been
found to play a part in how our body
works.
Electricity
and
Chemistry are related