Category: C

  • Chromatic adaptation

    A change in hue or saturation, or both, resulting from pre-exposure to light of other wavelengths.  

  • Capillary action

    A surface tension effect shown by the elevation or depression of a liquid at the region of contact with a solid, as in capillary tubes.  

  • Calorigenic action

    Heat produced by the metabolism of food.  

  • Compensated acidosis

    Acidosis in which the pH of body fluids has returned to normal. Compensatory mechanisms maintain the normal ratio of bicarbonate to carbonic acid (approx. 20:1) in blood plasma, even though the bicarbonate level is decreased or the carbon dioxide level is elevated.  

  • Carboxylic acid

    Any acid containing the group-COOH. The simplest examples are formic and acetic acids.  

  • Cricopharyngeal achalasia

    Failure of the lower pharyngeal muscles to relax during swallowing. The condition may cause dysphagia or aspiration of food.  

  • Centripetal acceleration

    Rate of change in velocity per unit of time while on a circular or curved course.  

  • Colonic absorption

    The uptake of water, electrolytes such as sodium, amino acids, and some drugs by the mucosa of the large bowel.  

  • Carbohydrate absorption

    The taking up of the monosaccharides by the brush border of the small intestine.  

  • Constructional ability

    The ability to copy or draw shapes, figures, or lines (e.g., with a pen and paper). This nonverbal ability depends on the integration of several higher brain functions, including perception, planning, and motor coordination. It is lost in organic brain syndromes.