Biology

Biology, 04.08.2019 23:30, jahnoibenjamin

An emg is a record of the electrical activity of the heart. a. true b. false

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Health, 24.06.2019 18:00, ashtonsilvers2003

What is the record that displays the pattern of the electrical activity of the heart

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Health, 16.07.2019 08:50, angeldawnfick

True or false anaerobic exercise requires oxygen true false the two types of vitamins are fat and water soluble true false lactic acid is produced during low-moderate exercise true false the formula for your maximum heart rate is 220-age true false fitt stands for frequency, intensity, time and type true false metabolism is converting food into energy true false aerobic exercise doe not require oxygen true false carbohydrates are the bodies main source of fuel true false anaerobic exercise is exercise in short bursts true false target heart rate is your ideal heart rate during exercise true false

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Medicine, 09.09.2019 22:20, zakariaaap1

By careful placement of surface electrodes on the body, it is possible to record the complex, compound electrical signal of the heart. this tracing of the electrical signal is the electrocardiogram (ecg). which of the following statements is/are true? a. to record an ecg, 12-electrodes are placed in a circular pattern around the person’s chest. b. a normal ecg shows one single spike representing the contraction of the entire heart. c. these electrodes are placed using needles deeply in the skin of the chest. d. a resting ecg usually takes approximately 1-2 hours to be recorded. e. the ecg is useful for analyzing both normal and abnormal depolarizations of the heart.

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Health, 30.09.2019 09:30, cicilee49

1. the average heart beats about 100,000 times a day. * true * false 2. the heart is located inside the ribcage and just to the right of the breast bone. * true * false 3. the heart has four chambers and is divided into a right and left side by a muscular wall called the septum. * true * false 4. the two atria hold the blood that circulates away from the heart. * true * false 5. the heart has four one-way valves, which open and close with each heartbeat. * true * false 6. the tricuspid valve and the mitral valve are located between the atria and allow the blood to flow from the atria to the ventricles. * true * false 7. arteries carry oxygen-poorblood from the heart to the body’s tissues and organs. * true * false 8. since the arteries keep pace with the heart, you can measure the heart rate by counting the contractions of the arteries. * true * false 9. capillaries are the largest of all blood vessels. * true * false 10. the exchange of oxygen and carbon dioxide takes place through the capillary wall. * true * false

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