Urea breath test. A person drinks a liquid containing a low level of radioactive material that is harmless or a nonradioactive material. If H. pylori is present in the person's gastrointestinal tract, the material will be broken down into labeled carbon dioxide gas that is expelled in the breath.
An active worksheet is the worksheet that is currently open. For example, in the picture above, the sheet tabs at the bottom of the window show Sheet1, Sheet2, and Sheet3, with Sheet1 being the active worksheet.The active tab usually has a white background behind the tab name.preadsheet. Alternatively referred to as a worksheet, a spreadsheet is a file made of rows and columns that help sort data, arrange data easily, and calculate numerical data. What makes a spreadsheet software program unique is its ability to calculate values using mathematical formulas and the data in cells.
Related Terms. Refers to objects currently being displayed or used. For example, in graphical user interfaces, the active window is the window currently receiving mouse and keyboard input. In spreadsheet applications, the active cell is the cell, usually highlighted, in which data can be entered or modified. The active program is the program currently running.