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43 know ingredients in cigarette smoke are carcinogenic compounds, and this leads to a significant link between smoking and cancer. Nicotine as a drug stimulates the central nervous system, and increases the heart rate as well as raising blood pressure; therefore it can result in hypertension. Another key ingredient of cigarettes is tar, and this substance deposits itself in the lungs and the respiratory tract. This tar makes the ciliated epithelium sticky, and it reduces the effectiveness of the wafting motion that the cilia in the throat perform. This reduction of wafting motion causes build ups of mucus, and can result in conditions such as smokers coughs, and this is where excess mucus needs to be either swallowed or released from the …show more content…
For example, a high performing athlete is under a great deal more stress that an average club player. Factors that cause stress are called stressors, and they can be anything from a major life event to an injury. Symptoms of stress are feeling of anxiety, and increased levels of tension in everyday life. Exposure to long periods of stress results in elevated levels of adrenaline hormones, and this can result in a low levels of resistance to diseases as wells as causing an imbalance of