Effects of Smoking on the Human Body Essay Example | Topics and Well Written Essays - 750 words

Effects of Smoking on the Human Body - Essay Example Once inhaled, carbon monoxide reaches the blood stream through the lungs and alveoli, it binds to the hemoglobin portion of the red blood cells, forming a stable compound called carboxyhaemoglobin (COHb). The stability of the compound is due to the fact that hemoglobin has a 200–250 times higher affinity for carbon monoxide than it has for oxygen. Thus, the oxygen-carrying capacity of the hemoglobin is reduced, limiting oxygen supply to cells and tissues. The diseases caused by limited oxygen in the blood include cardiovascular disease, stroke, and circulatory problems. Tar on the other hand, accumulates in the lung, causing the inflammation of the mucous membrane of the bronchi, the trachea, and the bronchioles, damages the lungs, reduces the size of the airway. Smoke thus interferes with the functioning of the respiratory system and causes chronic bronchitis and persistent cough. Tar also damages the cilia on the upper portions of the respiratory system and increases phlegm production. Finally, the chemicals in smoke damage the lungs, reduce lung surface area and affect the alveoli’s’ functionality. Lung cancer, Chronic Obstructive Pulmonary Disease (COPD), mouth and throat cancer, and increased asthma symptoms are the other respiratory effects of smoking (National Cancer Institute, 2008). ... One of the mechanisms by which smoking leads to elevated CO2 levels in the blood is that the harmful chemicals in the smoke damages the alveoli of the lungs. This damage implies that the CO2 formed in other parts of the body and transported to the lungs for elimination is not efficiently eliminated at the alveoli surfaces, leading to increased levels of CO2 in the blood. How Smoking Affects other Organ Systems Besides the respiratory system, smoking affects other organ systems such as the circulatory system. In this system, smoking causes the blood clotting, blockages and narrowing of blood vessels, increased risks of strokes and heart attacks, increased blood pressure, palpitations. These conditions cause various infections that might require procedures such as amputation. The nervous system and the brain are also affected by tobacco smoking, which decreases oxygen supply to the brain as hemoglobin combines with carbon monoxide. The normal functioning of the CNS is affected as delic ate nerve endings are damages and blood supply interfered with (The New York Times, 2002). Additionally, smoking causes attention deficit and memory problems. The immune system is also affected by the tobacco toxins that enter the body via smoking so that the functioning of the white blood cells is impaired. Thus, the body becomes vulnerable to infections. The reproductive system is also not spared by smoking, which may cause erectile dysfunction, impotency, sterility, menopause, and low weight births. Correlating Cellular Respiration with the Respiratory System The correlation between cellular respiration and the respiratory system is rather clear. For instance, minus cellular respiration in the lungs,

Herpert Simon Essay Example | Topics and Well Written Essays - 3000 words

Herpert Simon - Essay Example These observations lead to Simon’s rejection of the classical economic assumption of prefect-knowledge and to derive â€Å"bounded rationality† in decision making (Simon, etal, 1987). â€Å"In (‘On how to decide what to do’) (Simon) claims, rightly, that traditional economics has too often been concerned with what decisions are made rather than how they are made.† (Hunt 1) How decisions are made is a better real world indicator of how resources are allocated, which is the study of economics. (Hunt 2) Simon’s interest was in how man processes the limited available information and with imperfect logic. Bounded rationality â€Å"refers to peoples limited ability to make comparisons, to see into the future, and, more generally, to process information†. (Cyret 63) Simon created the term â€Å"satisficing†, presumably a hybrid term mixing satisfying and sufficing, to indicate achieving the perceived best position with imperfect informa tion. Preferring a blend of thinking, laboratory work and empirical observations of thinking and decision making, Simon wanted economists to get out of the think tanks and go observe business people making decisions. (Cyret) Simon started with the conviction that human rationality was bounded externally by social constraints and internally by cognitive restraints (Sent 227). People were not truly free to make decisions since conformity and possibility were unquantifiable constraints in the process. Bounded rationality was not concerned with symmetry or macroeconomic functions at all. It is a decision making and problem solving theory not meant to strengthen neoclassical economic thought like Nash’s game theory which Simon considered crude and incomplete. In Simon’s theory, quantification is used to enhance rationality, not create it. The management situation sets the conditions for rational thought; therefore some actions are predisposed to be viewed as nonworking solu tions (Mankelwicz 60). Common sense, or heuristics, actually applies available metrics as a screening tool. â€Å"Human perception may be as bounded in scope as our rationality†. (Mankelwicz 63). Quantitative results may be viewed as symbols, talisman. Managers may experience numbers as moral symbols, guideposts (Mankelwicz 64) Technical rationality, degree of quantification, economic, social, legal politics and political stakeholders, although largely invisible, impact the final decision, certainly the reasonable solution possibilities (Mankelwicz 65). Simon studied bounded rationality, the decision making process, under several disciplines allowing him to consider â€Å"decomposability†, the breakdown of problems into hierarchies, the systems of considering means and ends to reach a decision (Augier & Frank 584). Applying rationality, people cannot have perfect information. So, the decision making process is like the scientific methods of laboratory testing and field data collection. Neither is the sole path to truth. Neither is the sole source of perfect decisions. (Hunt 2) Managers must reach decisions through satisficing, that is being at least as optimal as the competition. It is possible the cost of optimization is greater than the reward. (Hunt 2) As early as the 1960’s, theories of systems were forming. â€Å"A system may be defined as an orderly grouping of separate but interdependent components for the purpose of attaining