what are nitrogen, calcium and phosferous use in the body?
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Calcium\nCalcium is one of the most important minerals for the growth, maintenance, and reproduction of the human body. Calcium is essential for the formation of and maintenance of healthy teeth and bones.\n\nThe bones incorporate calcium into their structure. Like other tissues in the body, bones are continually being reabsorbed and re-formed. Teeth incorporate calcium in their structure in a manner similar to bones.\n\nCalcium has other functions in addition to maintaining healthy teeth and bones. Blood coagulation, transmission of nerve impulses, muscle contraction and relaxation, normal heartbeat, stimulation of hormone secretion, activation of enzyme reactions, as well as other functions all require small amounts of calcium.\nPhosphorous\nThe main function of phosphorus is in the formation of bones and teeth. It plays an important role in the body's utilization of carbohydrates and fats and in the synthesis of protein for the growth, maintenance, and repair of cells and tissues. It is also crucial for the production of ATP, a molecule the body uses to store energy.\n\nPhosphorus works with the B vitamins. It also assists in the contraction of muscles, in the functioning of kidneys, in maintaining the regularity of the heartbeat, and in nerve conduction.\nNitrogen\n79% of the air around us is nitrogen . Living things need nitrogen to make proteins, but they cannot get it directly from the air because nitrogen gas is too stable to react inside an organism to make new compounds. \n\nSo nitrogen must be changed into a more reactive form to allow plants and animals to use it. Plants can take up and use nitrogen when it is in the form of nitrates or ammonium salts. Changing nitrogen into a more reactive substance is called nitrogen fixation. \n\nNitrogen fixation happens in three different ways:\n\nThe energy in a lightning bolt can split the di-atomic nitrogen molecule in the air allowing each nitrogen atom to react with oxygen to form nitrogen oxides. These oxides are washed to the ground by the rain where they form nitrates.\n\n\nThe Haber process is used by industry to produce ammonia from nitrogen. Ammonia is used to make fertiliser for farmers to feed their crops.\n\n\nNitrogen-fixing bacteria found in the soil and in the root nodules of leguminous plants fix nitrogen into a usable form.\n\n\nNitrogen compounds are returned to the soil by excretion and egestion from animals or when plants and animals die and decay. The nitrogen compounds returned in this way are changed back to nitrogen gas by denitrifying bacteria which live in the soil - thus completing the cycle.
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one a day calcium plus \n\nin the brown bottle with diff colored line on the bottle
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Vitamin D allows Calcium to be absorbed in your system.  Without it, the calcium just passes through.  I would suggest getting some calcium supplements (usually less than $20 for a month supply) which usually contain Vitamin D also.  Exposure to the sun also gives you Vitamin D so be sure to get plenty of sunshine!
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Water\n\nYes, water is a nutrient. It is the most important nutrient. In fact, your body is approximately 50 to 55 percent water. Your body uses water 24 hours a day. A by-product of the energy production in your body is heat. Water regulates your body temperature by dissipating that heat. Water also carries nutrients to the cells in your body. Water does not produce energy.\n\nCarbohydrates\n\nCarbohydrates are the primary source of energy for your body. Carbohydrates power every system in your body, including your brain, heart, muscles and internal organs.\n\nCarbohydrate can be simple (table sugar, corn syrup) or complex (whole grain). Simple carbohydrates enter your bloodstream very quickly. That is why you get a sugar high when you eat candy. Complex carbohydrates are processed and used more slowly.\n\nProtein\n\nProtein is like the brick and mortar of your body. It is the building blocks that provide the structure for the tissues of your body. Proteins are also used to transport essential elements in your blood stream.\n\nFats\n\nFat are our storehouses of energy. When we have excess nutrients in our body, some of it is stored as fat. The primary purpose of fat is energy production.\n\nThere are two main types of fats – saturated and unsaturated. Animal fats (meat, butter, lard) are usually saturated fats and contribute to heart disease and cancer. Vegetable fats (olive oil, corn oil) are generally unsaturated fats and are less harmful.\n\nSome fats have been found to be helpful in preventing some cancers and heart disease. These fats called omega-3 fatty acids are found in some fish, especially cold-water fish.\n\nVITAMINS\n\nVitamins are essential for the regulation of many of the functions of the body. Most vitamins cannot be manufactured by the body and must be obtained from your diet. Vitamins do not produce energy.\n\nMINERALS
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calcium is maintaind in the blood by the action of parathyroid hormone and calcitrol\nReceptors monitor the level and if it is low, parathyroid acts on bone to release calcium and increase intestinal absorption, if it is high the hormones act on bone to bind more calcium and the gut to stop absorbing it
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breathing, urea, ion content, temperature, water, sugar content (sorry , don't know the scientific terms)
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nitrogen - Liquid nitrogen is used for cooling experiments\noxygen - Always used in breathing and burning fuel. Given in hospitals, used as rocket fuel. \ncarbon dioxide - Used in carbonated drinks, fire extinguishers, and dry ice.\nargon - used as an inert gas to prevent reactions and preserve things.\nhelium - Used in balloons and helium-neon lasers.\nneon - Used in neon signs and helium-neon lasers.\nmethane - Is natural gas, used for heating & generating electricity.
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The best mineral for a healthy heart is magnesium - it is given to heart attack patients and improves their survival rate several times over.  Magnesium helps keep the "electrical impulses" in your body in good shape - it keeps your muscles from twitching and that includes your heart muscle.  (meaning palpitations)\n\nGood for your heart, though not a vitamin/mineral is omega 3 fatty acids - what's found in canola oil (and flaxseed oil).  \n\nVitamin D - the kind you get from sitting in the sun (the supplemental kind you have to convert to active vitamin D inside your body) - it keeps your system calm and your heart relaxed.
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1200 mg a day, but if you take it in supplement form, it is recommended you take magnesium with it.  magnesium helps your body absorb and utilize calcium.
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lipids\ncarbohydrates\namino acids/proteins\nnucleic acids
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Taking calcium together with magnesium supplements are your best bet.  Magnesium aids in absorption.  Milk has calcium but unfortunately your body needs a lot of calcium to digest the high protein content in milk so milk actually makes you calcium deficient.
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http://en.wikipedia.org/wiki/Calcium
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Well, nitrogen is a major ingredient in fertilizers, it is used in medicines, and it is essential for life.  \n\nBut so is carbon.  \n\nIf the question says fertilizers, I'd go with nitrogen.
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Nitrogen is the key element which gives proteins their functionality. The body needs proteins to build and repair tissues. Animals get these proteins from plants who get it from the air. The nitrogen in the air also keeps us from bursting due to excessive respiration.
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vitamins, minerals and fiber.
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Check out the methods section of this article: http://freenet.macatawa.org/~rimmer/Vitamin.htm\n\nThere are different methods to measure the content of different nutrients.  One of the most common methods is NIR spectroscopy.  And then there are chemical analyses and preparation techniques to isolate certain nutrients. In short, big time biochemistry going on!
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Water and "nutrients" depending on the specific type of cell. Plant cells need inorganic nitrogen compounds (ammonia, nitrate), phosphate, iron, magnesium, manganese, copper,...\nAnimal cells need organic substances like sugars or amino acids (which plant cells can produce on their own) additionally to vitamins and ions (iron, copper, cobalt, zinc, molybdenum, iodine, selenium,...)