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Investigating Two Aspects of Homeostasis

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Investigating Two Aspects of Homeostasis Aim: The aim of our experiment is to find out the relationship between our sweat production and heart beat that occurs before and after vigorous exercise. When we do vigorous exercise our heart beats faster because your body can't supply enough oxygen to your muscles, therefore anaerobic respiration starts, (what happens when there is no oxygen available from the lungs) this builds up lactic acid in the muscles. When high level of CO2 and lactic acid are detected in the blood, (by the brain) the pulse and breathing rate increase to rectify the situation. Introduction: Homeostasis covers all the function of your body to maintain a constant internal environment. Homeostasis controls the removal of CO2 and urea, the lungs helps removes CO2 and the kidneys removes the urea in urine and adjust the ion and water content of blood, the kidney also controls the ion, water, sugar and temperature. Sugar level is adjusted by the liver and pancreas. ...read more.


Eventually you get a cramp. This is in part because the muscles lack sufficient ATP to continue contracting. Also, lactic acid builds up and must be taken away by the liver. Runners who sprint actually have more muscle cells specialized for lactic acid fermentation than long distance runners. Too Hot: 1) Hairs lie flat 2) Sweat is produced to cool you down 3) Blood supply to the skin opens up to release body heat. This is called Vasodilatation. Too Cold: 1) Hairs stand on end to keep you warm. 2) No sweat is produced 3) Blood supply to the skin closes off. This is called vasoconstrictions. Hypothesis: We are going to test out the amount of sweat production compared to how many heart beat per minute that occurs before and after vigorous exercise. I predict that the more exercise we do, our heart would beat faster and would produce more sweat. This is because when vigorous exercise start; your body cannot supply enough oxygen to your muscles, which builds up lactic acid in the muscles, this can be painful. ...read more.


Safety: We shall make this experiment safe by doing the exercise out in an open space to avoid any dangerous activities. People should avoid doing exercise next to an object or a person because you could accidentally push them or knock them over which is a hazard. It must be a precaution to not run next to a wet patch as you may slip and hurt yourself. Glossary: Lactic Acid - is used as fuel by the heart, but excessive lactic acid slows contraction in skeletal muscles and is though to cause muscle soreness if not flushed out of the body. Homeostasis - Is the maintenance of a constant Internal Environment CO2 - Carbon Dioxide Anaerobic Respiration - Is what happens if there's no oxygen available to supply to your muscle. Skin - Is layers of dead cells to form a tough protective skin. Vasodilatation - When blood capillary opens up to release body heat. Vasoconstriction - When blood capillary closes off. ATP - Adenosine Triphosphate ...read more.

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