Physiology Essay Example | Topics and Well Written Essays - 500 words

Physiology - Essay Example The reason is that at higher altitudes, there is lesser amount of oxygen for the body and muscles. Therefore, the excess oxygen will help avoid the early production of lactic acid and keep heart rate lower even when the athlete is working harder at sea level. (Smith, 2005) The trick to high altitude training is a process known as acclimatization. This means that athletes must give time to their bodies to get used to the increase in altitude, and decrease in oxygen levels in the atmosphere. For instance, when an athlete reaches, say 5000 feet, he must spend some days there so that the body acclimatizes to the conditions present there before moving on to higher altitudes. After acclimatization to higher altitudes, when the athlete returns back to sea level, his endurance level and performance is better. As the oxygen levels at higher altitudes decrease, there are a number of changes that the body undergoes in the process of acclimatization. Firstly, the depth of respiration increases. The pulmonary arteries go through an increase in pressure, forcing blood into those parts of the lung which are not utilized under normal circumstances. (Curtis, 1999) Along with increasing the production of red blood cells to carry oxygen, the body also steps up the production of a specific enzyme that eases the discharge of oxygen from hemoglobin to the body tissue. (Curtis, 1999) As we know, the air in the atmosphere consists of 78% nitrogen, 21% oxygen and 1% water vapor, carbon dioxide and other gases. This is the proportion of gases you inhale during normal breathing. However, 6% of oxygen is breathed out together with carbon dioxide and other waste products. (Science Fair 2003: Does Exercise Affect the Amount of Carbon Dioxide Exhaled, 2003) During exercise, the body needs more energy which is provided to it through the chemical reaction of oxygen and glucose. This, in turn, means that during exercise, the body needs more

'Does Country Matter' - Summary and Critque Essay

'Does Country Matter' - Summary and Critque - Essay Example a) The question is, how much does country difference actually explain the variations in achievements of foreign affiliates To answer this, the elements they defined were as follows: Country effects, Industry effects, Multinational Corporation (MNC) effects, Affiliates effects and the Years observed, analyzing these to see how they all contributed to the average return or business success achieved by the foreign affiliates. They hypothesized that country had an important role to play and had not been explored fully in earlier research. b) Methodology The study is described as unique by the researchers because it uses performance of foreign affiliates as the primary unit of analysis, the country effects variables contained in it, and non-U.S. data, only Japanese MNCs. Data was taken from the Trend Survey of Overseas Business Activities (Trend Survey), annually conducted by the Japanese Ministry of Economy, Trade and Industry. The companies used were: either subsidiary (MNC has 10% capital invested),sub-subsidiary (MNC has 50% invested) or where a sub-subsidiary has 50% capital invested in the foreign affiliate company. 12,000 total, over 6 years were examined, using 616 c) Results and conclusions suggest that country effects are almost as great as industry effects, implying that the host country has great impact when determining performance, wi