PHYSIOLOGICAL EFFECTS OF ELECTRICITY
Most of us have experienced some
form of electric “shock” where electricity causes our body to experience pain
or trauma. If we are fortunate, extent of
that experience is limited to tingles or jolt of pain from static
electricity build-up discharging through our bodies. When we are working around
electric circuits capable of delivering high power to loads, electric shock
becomes much more serious issue, and pain is the least significant result of
shock.
As
electric current is conducted through a material, any opposition to that flow
of electrons (resistance) results in a dissipation of energy, usually in the
form of hear. This is the most basic and easy-to-understand effect of electricity
on the living tissues; current makes it heat up. If the amount of heat
generated is sufficient, the tissue may be burnt. The effect is physiologically
the same as damage caused by open flame or other high temperature source of
heat, except the electricity has the ability to burn tissue well beneath the
skin of a victim, even burning internal organs.
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Another
effect of electric current on the body , perhaps the most significant of
hazard, regards the nervous system. By “nervous system” I mean the network of
special cells in the body called “nerve cells” or “neurons” which process and
conduct multitude of signals responsible for regulation of many body functions.
The brain spinal cord, and sensory motor organs in the body function together
to allow it to sense, more respond , think and remember.
Nerve
cells communities to each other by acting as “transducer” creating electrical
signals ( very small voltage and current ) in response to the input of certain
chemical compounds called neurotransmitters, releasing neurotransmitters when
stimulated by electrical signals. If electric current of sufficient magnitude
is conducted through a living creature (human or otherwise) its effect will be
will be to override tiny electrical
impulses normally generated by the neurons, overloading the nervous system preventing both reflex and volitional signal
from being able to actuate muscles. Muscles triggered by an external (shock)
current will involuntarily contract, and there’s nothing the victim can do it.
This
problem is especially dangerous if the victim contacts an energized conductor
with his or her hands. The forearm muscles responsible for bending fingers tend to be better developed
then those muscles responsible for extending fingers, and so if both sets of
muscles try to contract because of an electric current conducted through the
person’s arm, the “bending” muscles will win, clenching the fingers into a
fist. If the conductor delivering the current to the victim faces the palm of
his or her hand, this clenching acting will force the hand to grasp the wire
firmly, thus worsening the situation by securing excellent Hello! Now I am telling you about the season best Jacket . It is the best to protect from cold Buy now and get comfortably.
