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bio review - (Opinion Essay 9 The workers of Alfred...

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Essay 7: 1. Oxygen enters through the nostrils, where it is warmed and humidified. 2. It passes through the pharynx, epiglottis, and larynx. It goes down the trachea into one of the 2 bronchi (at this point it is in the lungs), then bronchioles, and finally into the alveoli. 3. In the alveoli the oxygen is picked up by the interstitial fluid which contains red blood cells. 4. it leaves the lung through the pulmonary vein to the left atrium and left ventricle through the aorta to all the other cells of the body. 5. Once in cells it is used for cellular respiration. Combined with glucose in the mitochondria it forms CO2 and H2O and ATP. At this point it is no longer oxygen but instead CO2 and H2O and it leaves the mitochondria and cell through osmosis. **** I took all of this straight out of lecture 9&10. If anything is incorrect please let me know, but I think everything here is fine. Also, I don’t know if this much detail is necessary. Let me know what you two think! Essay 8:
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Unformatted text preview: (Opinion) Essay 9: The workers of Alfred Nobel’s dynamite factory who suffered from heart troubles at home noticed that their chest pains were relieved when they were in the factory. The local doctors noticed this and began prescribing nitroglycerine for heart disease. Ferid Murad found that nitroglycerine, amyl nitrate and other nitrogen containing substances that caused vasodilatation, released nitric oxide (NO) which caused the muscles surrounding the blood vessels to relax. (lecture 9) Essay 10: Erythropoietin (EPO) is a peptide hormone produced by the kidnesy and secreted in to the blood stream in response to lowered oxygen levels. it stimulates the bone marrow to make more oxygen-carrying red blood cells. Genetically-engineered human erythropoietin has been developed to help people with chronic kidney disease to fight anemia. However, athletes have begun using EPO to cheat and gain an unfair advantage by increasing their endurance. (lecture 11)...
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