MLA : Unit 1 Questions and Answers graded A+

MLA : Unit 1 Questions and Answers graded A+ basilic vein large vein on inner side ("pinky" side) of arm cephalic vein a superficial vein of the arm (thumb side) commonly used for venipuncture ethylenediaminetetraacetic acid (EDTA) an anticoagulant commonly used in hematology gauge a measure of the internal diameter (or bore) of a needle hematoma the swelling of tissue around a vessel resulting from leakage of blood into the tissue hemoconcentration increase in the concentration of cellular elements in the blood hemolysis rupture or destruction of red blood cells resulting in the release of hemoglobin hypodermic needle a hollow needle used for obtaining fluid specimens or for injections lumen the open space within a tubular organ or tissue median cubital vein a superficial vein located in the bend of the elbow (cubital fossa) that connects the cephalic vein to the basilic vein order of draw a prescribed order for filling vacuum tubes during blood collection to prevent contaminating one tube with the additive of another palpate to examine by touch phlebotomy venipuncture; entry of a vein with a needle syringe a hollow, tube-like container with a plunger, used for withdrawing fluids or for injections tourniquet a band used to constrict blood flow vein a blood vessel that carries deoxygenated blood from the tissues to the heart venipuncture entry of a vein with a needle; a phlebotomy winged collection set/ a small-gauge needle with attached plastic tabs (wings) six or more inches of tubing and a Luer-Lok or vacuum tube holder connector; sometimes called a "butterfly" set capillary a minute blood vessel that connects the smallest arteries to the smallest veins and serves as an oxygen exchange vessel capillary action the action by which a fluid enters a tube because of the attraction between the fluid and the tube capillary tube a slender glass or plastic tube used for laboratory procedures heparin an anticoagulant used therapeutically to prevent thrombosis; also used as an anticoagulant in certain laboratory procedures lancet a sterile, sharp-pointed blade used to perform a capillary puncture lateral toward the side binocular having two oculars or eyepieces birefringence the characteristic of double refraction; the characteristic of being able to split a beam of polarized light into two light beams coarse adjustment control that adjusts position of microscope objectives and is used to initially bring objects into focus condenser apparatus located below the microscope stage that directs light into the objective confocal laser scanning microscope a microscope using a laser as the light source and producing images of very high resolution differential interference contrast (DIC) microscope a microscope equipped with special Nomarski optics that enhance contrast in unstained, transparent specimens, producing a three-dimensional image electron microscope a microscope using an electron beam to create images from a specimen and that is capable of much greater magnification and resolving power than a light microscope eyepiece ocular field diaphragm adjustable aperture attached to microscope base fine adjustment control that adjusts position of microscope objectives and is used to sharpen focus fluor a substance that absorbs short wavelength (exciting) light and emits longer wavelength (emitting) light iris diaphragm device that regulates the amount of light striking the specimen being viewed through the microscope Köhler illumination alignment of illuminating light for microscopy; double diaphragm illumination lens a curved transparent material that spreads or focuses light lens paper a special nonabrasive material used to clean optical lenses magnification in microscopy, the size of the image produced compared to the actual size of the object being viewed micrometer a ruled device for measuring small objects microscope arm the portion of the microscope that connects the lenses to the base microscope base the portion of the microscope that rests on the table and supports the microscope monocular having one ocular or eyepiece nosepiece revolving unit to which microscope objectives are attached numerical aperture (N.A.) a mathematical expression of the resolving power of a lens objective magnifying lens closest to the object being viewed with a microscope ocular eyepiece of the microscope that contains a magnifying lens ocular micrometer a clear glass disk that fits in the microscope eyepiece, is etched with a precise scale, and is used to measure objects viewed with the microscope; also called ocular reticle parfocal having objectives that can be interchanged without varying the instrument's focus resolving power the ability of a microscope to produce separate images of two closely spaced objects reticle a glass circle etched with a pattern of calibrated grids, lines, or circles and inserted into a microscope eyepiece to allow the etched pattern to be imposed on the field of view stage platform that holds the object to be viewed microscopically stage micrometer a transparent glass slide marked with a precise scale in micrometers and used to calibrate ocular micrometers by aligning the ocular scale with the stage scale working distance distance between the microscope objective and the microscope slide when the object is in sharp focus accuracy the closeness of agreement of a measured value with the true value average the sum of a set of values divided by the number of values in the set; the mean blind sample an assayed sample that is provided as an unknown to laboratories participating in proficiency testing programs calibration the process of checking, standardizing, or adjusting a method or instrument so that it yields accurate results coefficient of variation (CV) a calculated value that compares the relative variability between different sets of data controls commercially available assayed solutions that are chemically and physically similar to the unknown and are tested in the same manner as the unknown to monitor the precision of a test method Gaussian curve a graph plotting the distribution of values around the mean; normal frequency curve Levey-Jennings chart a quality control chart used to record daily quality control values mean the sum of a set of values divided by the number of values in the set; the average