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This gene controls the production of the protein that directs the manufacturing of calcium ion channels within the cell wall of most cells . To understand what happens with calcium and calcium channel blockers at the cellular level , the researchers used a high powered imaging system to observe individual cells that line small arteries , and to measure changes in the concentration of calcium , and how those changes affect the arteries . These constituents arise from agricultural activities ( e.g ., livestock and human wastes , and fertilizers in the case of ammonia ) and from windblown dust ( kosa , yellow sand in the case of calcium ) and are basic , meaning that they can neutralize the strong acids . When conditions are right within the cell ( for example , when the temperature is within certain limits and when the concentration of calcium is just right ) tubulin - - " the ' brick ' that makes up the smokestacks - - automatically come together to form microtubules . Corticosteroid medications reduce the absorption of calcium , thereby increasing the risk for bone loss and osteoporosis over time . His research interests in the area of calcium homeostasis and bone include the potential effect of dietary phytoestrogens on bone health , plant molecules as well as in reproductive tissues .