Cover: Mechanical stimulation increased [Ca²⁺]_i of cells in the intact tracheal epithelium. Approximate cell borders and the position of the glass micropipette are outlined in white. Relative [Ca²⁺]_i levels are represented in pseudocolor (see color bar for scale). Increased [Ca²⁺]_i spread from the mechanically stimulated cell to the fourth neighboring cells to the left and right by 10 s after stimulation. For further information, see the article by Felix and colleagues 602.
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