Category: T

A white blood cell (lymphocyte) released when foreign substances such as an infectious organism invade the body.  

A white blood cell (lymphocyte) that helps to protect the body against foreign materials or organisms. A type of T lymphocyte, whose surface is marked by CD4 receptors, that is involved in both cell-mediated and antibody-mediated immune responses. It secretes cytokines (chemical signals) that stimulate the activity of B cells and other T cells and…

Immunity against certain infections, allergies, and other diseases whose effectiveness is based on the number of T-cells present in blood.  

A differential skin test using Giemsa stain with microscopic examination.  

Surgical insertion of small Teflon tubes in the tympanic membrane to equalize pressure, promote fluid drainage, and ventilate the middle ear.  

A hearing test that measures the ability of the tympanic membrane in the ear to move in response to air pressure (rather than sound). A test done to determine whether allergy or infection is interfering with adequate functioning of the eardrum. Varying tones are administered to the outer ear canal, and the pressure response within…

A graphic record of the movement of the tympanic membrane in response to air-pressure changes in the external auditory canal.  

Loud, high-pitched sounds similar to a drum, usually heard over an air-filled stomach.  

Measurement of the relative cloudiness of a solution, such as urine, in which the amount of light able to pass through the substance is quantified by using a spectrophotometer. Measurement of the transmission of light through a suspension, used to determine the presence of protein in urine, spinal fluid, or plasma, and in the quantitative…

Outermost layer of connective tissue covering an organ or structure that is not covered by a serosa.