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Essay on Human Nutrition 1 - Lesson 8

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ASSIGNMENT – LESSON 8 1. Explain in 2-3 sentences each, the role of water in the body for 5 different physiological processes. • Fluid intake and fluid excretion: There is usually a balance between intake and excretion of water. If the water balance becomes unbalanced, this can greatly affect various bodily functions such as blood pressure, blood sugar levels or brain function. This imbalance will also create a thirst reaction and by the time we perceive this, our body is already mildly dehydrated. • Water as a means of transport: Most of the water, which a person takes in each day, is required to transport nutrients into the cells. To be able to bind and remove metabolic waste products it is important that the water is not …show more content…

Such contaminants would be in a community water system where chorine and trihalomethanes have been added as disinfectants. Examples are pump filters and filters that attach to bottles. Filters can also get clogged with the potential to force pathogens through. They provide a rapid way of removing particles, bacteria, protozoa and some viruses in cloudy/turbid water – but if too turbid can clog the filter rapidly therefore need to be monitored if they need changing. If I was to choose a water purifier for my home, I would invest in an under-counter model with stainless steel housings as they last longer and are designed to operate under constant house pressure without any leaking or bursting problems. A Comparison Table Iodine &Chlorine Chlorine Dioxide MSR MIOX UVR Steripen Filters Pump/bottle Boiling Removal Bacteria Y Y Y Y Y Y Removal Viruses Y Y Y Y N Y Removal Giardia Y Y Y Y Y Y Removal Cryptosporidium N Y Y Y Y Y Taste effected? Y N N N N N Weight per unit few g few g 99g 103g+ vary Gas+stove Pack size tiny tiny small small Larger (pump)Smaller (bottle) Medium (gas+stove) Batteries? N N Y Y N N Time to work Bacteria 30 15 15 Immed Immed Immed Time to work Protozoa 120 (not crypto) 30- 240 < 240 immed immed Immed Max Volume any any 4 litres 1 litre any Recepticle size Short term Cost $10/box $10/box $160 $100

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