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Long Refractory period - Properties of a Beating Heart
Refractory period is the period during which a stimulus fails to evoke a response. In a beating heart, if an external stimulus is applied during contraction, there is no response irrespective of how strong the stimulus is. This is because the cardiac muscle is refractory throughout the contraction. The reason why cardiac muscle has a long refractory period is t3at the duration of its action potential is almost as long as that of its mechanical activity. The fact that the heart sleeps and does not reacts when exposed to day-to-day exciting and stressful situations without missing a heartbeat every now and then ensures its smooth functioning hundred long years.
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Eutrophication: Materials such as sewage or organic wastes from milk plants, canneries, slaughter houses, paper mills, starch factories and fish processing plants, and runoff
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Give the common name of the historic mineral that was the original source of radium and the first substance in which helium was discovered on earth: Pitchblende
How is life originated ?
The important physico-chemical properties of thiamin are as follows: a) Thiamin hydrochloride is a white, needle-shaped crystalline substance. b) It has a characteristic sm
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Explain the Ventricular Fibrillation This is a fatal condition in which the heart beats like a bag of worms and the patient may die in a couple of hours, if the action is not t
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