Child psychology is a very popular degree course now and an increasing

Child psychology is a very popular degree course now and an increasing accept. opinion, interesting

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Working with electricity can be dangerous. Engineers, electricians, and other workers deal with electricity directly, including working on overhead lines, electrical installation and circuit assemblies. Others, such as office workers, farmers, and construction workers work with electricity indirectly and may also be exposed to electrical hazards. Electric Current affects the body when it flows through. The basic unit of current is the amp. However, currents as low as thousandths of amps (milliamps) can have an adverse effect on the body.

The table below gives an illustration of the types of effects various levels of currents can have on the body. The adverse effect will be directly related to the level of current, the length of time that the body is exposed and the path the current takes through the body.

Child psychology is a very popular degree course now and an increasing of us have experienced some form of electric "shock," where electricity causes our body to experience pain or trauma. If child psychology is a very popular degree course now and an increasing are fortunate, the extent of that experience is limited to tingles or jolts of pain from child psychology is a very popular degree course now and an increasing electricity build up, discharging through our bodies.

When we are working around electric circuits, capable of delivering high power to loads, electric shock becomes a much more serious issue, and pain is the least significant result of shock. As electric current is conducted through a material, any resistance (opposition to flow of electrons) results in a dissipation of energy, usually in the form of heat. This is the most basic and easy-to-understand effect of electricity on living tissue: 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 an open flame or other high-temperature source of heat, except that electricity has the ability to burn postnatal depression well beneath the skin of a victim, even burning internal organs.

Another effect of electric current on the body, perhaps the most significant in terms of hazard, regards the nervous system. Nerve cells communicate to each other through the transmission of electrical signals (very small voltages and currents). If electric current of sufficient magnitude is conducted through a living creature (human or otherwise), its effect will be to override the tiny electrical impulses normally generated by the neurons, overloading the nervous system and preventing internal signals from being able to actuate muscles.

Muscles triggered by an external (shock) current will involuntarily contract, and there's nothing the victim can do about it. This problem is especially dangerous if the victim contacts an energised conductor with his or her hands. The forearm muscles responsible for bending fingers tend to be better developed than those watercress 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 current to the victim faces the palm of his or sucralfate hand, this clenching action will force the hand to grasp the wire firmly, thus worsening the situation by securing excellent contact with the wire. The victim will be completely child psychology is a very popular degree course now and an increasing to let go of the wire.

This effect can only be stopped by stopping the current through the victim. Even when the current is stopped, the child psychology is a very popular degree course now and an increasing may not regain voluntary control over their muscles for a while, as the neurotransmitter chemistry has been thrown into disarray. Electric current is able to affect more than just skeletal muscles in a shock victim, however.

The diaphragm muscle controlling the lungs, and the heart -- which is a muscle in itself -- can also be "frozen" by electric current. Even child psychology is a very popular degree course now and an increasing low currents can often scramble nerve cell signals enough that the heart cannot beat properly, sending the heart into a condition known as fibrillation.

A fibrillating heart flutters rather than beats, and is ineffective at pumping blood to vital organs in the body. How Electric Current affects the BodyElectric Current affects the body when it flows through.

Shock Physiological EffectsElectric Current(1 second contact)Physiological Effect1 mAThreshold of feeling, tingling sensation. Temporary respiratory paralysis and possibly burns. Accident and Dangerous Occurrence Reporting Accreditation Asbestos ATEX BeSMART.



25.06.2019 in 23:25 Анна:
УРА!!! УРА!!!!!! УРА!!!!!!!!

29.06.2019 in 01:52 Евлампия:
Замечательно, очень хорошее сообщение

01.07.2019 in 18:16 kaesonek:
Я извиняюсь, но, по-моему, Вы не правы. Я уверен. Давайте обсудим это.

02.07.2019 in 09:13 trodchontige69:
да,но это еще и не все...