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Key Role of Cardiopulmonary System - Essay Example

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The paper "Key Role of Cardiopulmonary System" states that Nifedipine is a better drug to be used than Sildenafil because the effect of Sildenafil is best used in penis erections only. Nifedipine helps to relieve pulmonary hypertension and in this case, can prove to be useful than any other drug…
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Key Role of Cardiopulmonary System
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Download file to see previous pages As an individual ascends to higher areas than the sea level a measured change of the partial pressures of carbon dioxide and oxygen has been noticed. These changes in partial pressures cause the body to react differently to the ascent of an individual. When a person ascends his body tries to overcome the problems of low partial pressure by introducing phenomena of acclimatization (1-2). As the partial pressure of oxygen is low at altitudes the person is not able to absorb enough oxygen so that his cells are oxygenated. The very first mechanism which gets activated in response to high altitudes is increased pulmonary ventilation. Increased pulmonary ventilation allows the mountain climbers to breathe rapidly and take excess oxygen which is required in the body. It also helps to excrete carbon dioxide which is a poisonous gas and would decrease the pH if it is not ventilated. As a person ascends from the sea level he is exposed to low PO2 and this stimulates specific chemical receptors in the arteries. These are known as chemoreceptors which detect any change in the chemical composition of the blood and gases. These chemoreceptors stimulate the respiratory centre and because of this, the person ventilates more than the normal. Similarly, if a person stays at high altitudes for a long time these chemoreceptors can increase normal pulmonary ventilation by almost 500%. It has also been reported that this increased pulmonary ventilation is due to the imbalance of ions in the cerebrospinal fluid. As CO2 is excreted from the body, the pH of the body decreases to such levels that the bicarbonate ions even decrease in the cerebrospinal fluid. These changes activate the chemosensitive neurons found in the respiratory centre and they further increase the pulmonary ventilation (2, 3, 4)
 Altitude is known to have a considerable effect on the partial pressures of gases in the atmosphere, blood and alveoli. It is seen from the case that as PF ascended 5,300 m above sea level, he started having disturbances because of his low acclimatization.  ...Download file to see next pagesRead More
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