Category: A

  • Autologous transplantation

    Transplantation of material from one location in the body to another site. An intervention in which an individual contributes their own blood or tissue for their own use.  

  • Allogeneic transplantation

    Transplantation of material from a donor to another person.  

  • Airborne transmission

    The spread of infectious organisms by aerosol or dust particles. Diseases spread by airborne transmission include varicella-zoster virus and tuberculosis.  

  • Aerobic trainable

    Exercise training for the purpose of attaining aerobic conditioning. Although no formula should be slavishly applied, a general guideline is that aerobic conditioning will be obtained by normal, healthy persons who exercise three to five times a week for 35 min or more and at an intensity that produces a heart rate of 220 minus…

  • Ascending tract

    Axons that carry impulses up the spinal cord or from the spinal cord to the brain.  

  • Alimentary tract

    The canal or passage from the mouth to the anus. Referred to as the alimentary canal, the elongated tube-like structure spans from the oral cavity to the rectum and is responsible for the passage of food and waste materials in the human body. The collective term for all the organs forming the pathway through which…

  • Afferent tract

    A primary or secondary sensory tract of axons inside the central nervous system.  

  • Alum-precipitated toxoid

    Toxoid of diphtheria or tetanus precipitated with alum.  

  • Anthrax toxin

    The three proteins made by the infectious bacterium Bacillus anthracis responsible for the deadly effects of anthrax. Anthrax toxin includes protective antigen, which helps the bacterium enter cells, and lethal and edema factors, which kill cells by disrupting the cell membrane’s normal biochemical functions.  

  • After touch

    Persistence of the sensation of touch after contact with the stimulus has ceased.