Single function switches are the most commonly used adaptive switches. This type of switch performs one function (i.e., on/off) this switch has only one function - on or off. The switch may only be in one of the states at any one moment in time. Multiple function switches may perform two or more functions.
Echinocytes and keratocytes should be considered in the differential diagnosis of spur cell anemia. Echinocytes or burr cells are spiculated red blood cells with uniform, narrow, spikelike surface projections. Spur cells have fewer spicules, and the spicules vary more in size than echinocytes. Keratocytes are acanthocytelike cells with bizarre shapes and horny projections. Differential Diagnoses.
Clue cell. Bacteria obscuring the borders of vaginal epithelial cells, giving them a stippled appearance. Vaginal wet mount with NaCl preparation, showing a clue cell at bottom left, and two normal epithelial cells. Clue cells are epithelial cells of the vagina that get their distinctive stippled appearance by being covered with bacteria. The etymology behind the term clue cell derives from the original research article from Gardner and Dukes describing the characteristic cells.