Category: B

  • Blended family

    A common contemporary family group including children from previous and current relationships. A family that consists of a biological parent, a stepparent, and the children of one or both parents. Family formed when one or both parents bring children from a previous union. In the domain of familial dynamics, a new family unit emerges through…

  • Blowing exercise

    An exercise in which the patient exhales into a tube with high end-expiratory pressure to open regions of the lung that may have collapsed and to prevent atelectasis. This encourages deep breathing, which tends to aid lung expansion.  

  • Base excess of extracellular fluid

    The substance concentration of base in extracellular fluid determined at a pH of 7.40 and Pco2 of 40 mm Hg. Because this quantity cannot be determined directly, a model of extracellular fluid is used as a basis. The model consists of one volume of blood plus two volumes of plasma. As with the base excess…

  • Base excess of blood

    The substance concentration of base in whole blood determined at a pH of 7.40 and Pco2 of 40 mm Hg. This measurement helps one assess the relative contribution of respiratory versus metabolic components in acid-base imbalances in the blood.  

  • Biomedical ethics

    Moral inquiry into issues raised by health care education, practice, and research.  

  • Basophilic erythrocyte

    An RBC in which cytoplasm stains blue. The staining may be diffuse (material uniformly distributed) or punctate (material appearing as pinpoint dots).  

  • Bicycle ergometer

    A stationary bicycle used in determining the amount of work performed by the rider.  

  • Brush border enzymes

    An enzyme produced by the cells of the villi and microvilli (brush border) lining the small intestine.  

  • Branching enzymes

    An enzyme, called a glycosyltransferase, that transfers a carbohydrate unit from one molecule to another.  

  • Bacterial enzymes

    An enzyme produced by bacteria; many have specific, toxic effects on humans.