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  2. Bicarbonate buffer system - Wikipedia

    en.wikipedia.org/wiki/Bicarbonate_buffer_system

    The tears are unique among body fluids in that they are exposed to the environment. Much like other body fluids, tear fluid is kept in a tight pH range using the bicarbonate buffer system. [15] The pH of tears shift throughout a waking day, rising "about 0.013 pH units/hour" until a prolonged closed-eye period causes the pH to fall again. [15]

  3. Calcium metabolism - Wikipedia

    en.wikipedia.org/wiki/Calcium_metabolism

    Calcium regulation in the human body. [6]The plasma ionized calcium concentration is regulated within narrow limits (1.3–1.5 mmol/L). This is achieved by both the parafollicular cells of the thyroid gland, and the parathyroid glands constantly sensing (i.e. measuring) the concentration of calcium ions in the blood flowing through them.

  4. Biological pump - Wikipedia

    en.wikipedia.org/wiki/Biological_pump

    The carbonate pump is sometimes referred to as the "hard tissue" component of the biological pump. [45] Some surface marine organisms, like coccolithophores, produce hard structures out of calcium carbonate, a form of particulate inorganic carbon, by fixing bicarbonate. [46] This fixation of DIC is an important part of the oceanic carbon cycle.

  5. Marine biogeochemical cycles - Wikipedia

    en.wikipedia.org/wiki/Marine_biogeochemical_cycles

    Biogenic calcium carbonate is formed when marine organisms, such as coccolithophores, corals, pteropods, and other mollusks transform calcium ions and bicarbonate into shells and exoskeletons of calcite or aragonite, both forms of calcium carbonate. [57] This is the dominant sink for dissolved calcium in the ocean. [114]

  6. Calcium cycle - Wikipedia

    en.wikipedia.org/wiki/Calcium_cycle

    The calcium cycle is a transfer of calcium between dissolved and solid phases. There is a continuous supply of calcium ions into waterways from rocks, organisms, and soils. [1] [2] Calcium ions are consumed and removed from aqueous environments as they react to form insoluble structures such as calcium carbonate and calcium silicate, [1] [3] which can deposit to form sediments or the ...

  7. Bicarbonate - Wikipedia

    en.wikipedia.org/wiki/Bicarbonate

    A bicarbonate salt forms when a positively charged ion attaches to the negatively charged oxygen atoms of the ion, forming an ionic compound. Many bicarbonates are soluble in water at standard temperature and pressure; in particular, sodium bicarbonate contributes to total dissolved solids, a common parameter for assessing water quality. [6]

  8. 5 Helpful Calcium Supplements for Bone Health You Can Order ...

    www.aol.com/best-calcium-supplements-bone-health...

    TheraCal is NSF-certified, and contains calcium citrate, a type of calcium that research shows has the best absorption on an empty stomach (compared to calcium carbonate, the other most common ...

  9. Metabolic acidosis - Wikipedia

    en.wikipedia.org/wiki/Metabolic_acidosis

    The body regulates the acidity of the blood by four buffering mechanisms. [citation needed] Bicarbonate buffering system; Intracellular buffering by absorption of hydrogen atoms by various molecules, including proteins, phosphates and carbonate in bone. Respiratory compensation. Hyperventilation will cause more carbon dioxide to be removed from ...

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