# electricity.txt

 What is the movement of electrons? electricity All matter is composed of atoms that contain (+) and (-) charged particles called what? ions What are electrons? particles of matter possessing a (-) charge and very small mass What is the rate at which the charge moves past a given point? current Electrons move from areas of high potential energy to where? ares of low potential energy Ampere (amps) measure what? current What is intensity measured in? amps What is the range of mamp for imperceptible? 0-1 What is the range of mamp for tingling, muscle contraction? 1-15 What is the range of mamp for painful electric shock? 15-100 What is the range of mamp for cardiac fibrillation/respiratory arrest? 100-200 What is the range of mamp for rapid burning, destruction of tissue? +200 What produces the flow of electrons and is measured in voltz? electromotive force (EMF) Electromotive force is referred to as what? potential energy sitting there What is voltage? strength of current (pressure) amount of current through the wire=pressure What is considered low voltage? 150 voltz What is considered high voltage? +150 voltz What are materials that offer little oppostion to current flow? conductor Conductors are good at what? passing on electricity Metal&water, blood&muscle, and the nerve system are examples of what? conductors What is material that resists current flow? insulators rubber, wood, plastic, skin, bone, and tendons are examples of what? insulators What is resistance? opposition to electrom flow electrical impedence measured in OHMS What is OHMS law? current flow = voltage/resistance rate of flow = electromotive force/opposition to current What are watts? voltz X amperes measure of electrical power What are two types of electrical current? D.C. (direct current) A.C. (alternating current) What are some other words for direct current? galvanic, monophasic, uni directional What are some other words for alternating current? faradic, biphasic, 2 directions What are 3 types of DC/AC current? continuous, interrupted/modulated, surge What is an alteration in current flow (shape, direction, amplitude, duration)? waveforms What is amplitude? reflects intensity of current (by height) What reflects the rate of current? frequency What happens to tissues if amplitude or frequency increases? increased excitability of tissues What is a circuit? path of current from power source through components back to source What circuit has the power drawn off at each link? All devices are either on or off. series circuit What circuit has each appliance directly connected to the + or - charge and the appliance completes the circuit? parallel circuit What is advantage? you can disconnect on appliance without interrupting the flow to others and each appliance gets the full voltage What circuit decreases by each appliance that draws on it? series circuit What are 4 ways to alter OHM's law? 1. abrade area/skin2. apply HP3. clean with alcohol4. clip or shave hair What do you need to decrease in order to make e stim more effective? (OHM's law) impedence What are the 2 polar effects seen with direct current (galvanic)? anode- positive electrode cathode-negative electrode What electrode is normally seen as red, has cold effects, attracts acids (-), and repels alkaline (+)? anode What electrode is seen as black, has heat effects, repels acids (-), and attracts alkaline? cathode What electrode has a sclerotic effect, causes vasoconstriction, and decreases hemorrhage and metabolism? anode What electrode has an anti-sclerotic effect (softens tissues, good for scar tissue), causes vasodilation, and in creases hemorrhage and metabolism? cathode What electrode decreases tissue excitability, and nerve irritability (used for pain relief), has a weaker contraction, and decreases pain in acute stages of inflammation? anode What electrode increases excitability of tissues, and nerve irritability (used for increased contraction force), has a stonger contraction, and dispels fluids by increasing circulation and stimulating absorption? cathode Authorjpowell22 ID110980 Card Setelectricity.txt Descriptionlecture 8 10-20-11 Updated2011-10-27T20:01:00Z Show Answers