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NHA B exam with solved questions and answers
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Exam of 18 pages for the course nha at nha (NHA B exam)
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(NHA) Medical Assisting CertificationStudy Guide
CC - ANSWERChief Complaint
Segment - ANSWERLine between two waveforms
P Wave - ANSWERArterial Depolarization
How many 1mm boxes are in a 6 second rhythm strip? - ANSWER30 one millimeter
boxes
The SA node represents which waveform on the EKG? - ANSWEROnly the P wave
What is the reading you can get from the RR interval? - ANSWERVentricular Pulse
What is the primary stage of Hemolysis? - ANSWERVascular phase and platelet phase
together
What is Electrophoresis? - ANSWERAnalyzation of the chemical components of blood,
e.g. hemoglobin, serum, urine, cerebrospinal fluid based on electrical charge.
Positive testing for occult blood in a stool sample turns which color? - ANSWERTurns
blue on a positive test for occult blood in feces
The stages of Hemostasis - ANSWER1. Vascular, 2. Platelet Phase, 3. Coagulation
Phase,
4. Fibronolysis
Blood vessels - ANSWERAorta, Arteries, Arterioles, Capillaries, Venues, Veins,
Superior and Inferior Vena Cavae
Outer connective tissue layer of a blood vessel - ANSWERTunica Adventitia
Inner endothelial tissue of a blood vessel - ANSWERTunica Intima
The inner smooth layer of a blood vessel - ANSWERTunica tunica media
,The standards of right and wrong in a medical setting - ANSWERCode of Ethics
What do you find in capillaries? - ANSWERA mixture of venous and arterial blood is
found
The average adult has how many liters of blood? - ANSWER5-6 Liters
What is the percentage of water in the blood? - ANSWER92%
Percentage of plasma in the blood? - ANSWER55%
Percentage of formed elements in the blood? - ANSWER45%
99% of formed elements in the blood - ANSWERRBC,s or Erythrocytes
Where do you find hemoglobin? - ANSWERRBC,s
Where do all blood cells originate? - ANSWERBone marrow
How many RBC,s per microliter of blood - ANSWER4.2-6.2 million
What is the second most numerous WBC - ANSWERLymphocyte with 20-40%
Their numbers increase in intracellular infections and TB - ANSWERMonocytes
Their numbers increase in bacterial infections and are often first on the scene -
ANSWERNeutrophils
These WBC,s play an important role in viral infection as well as in immunity -
ANSWERLymphocytes
Number of leukocytes for average adult per microliter - ANSWER5000-10000
Leukopenia - ANSWERDecrease in WBC,s seen with viral infection and leukemia
Comprises 3-8% of WBC or leukocytes - ANSWERMonocytes
Largest in size of the leukocytes - ANSWERMonocytes
Carries histamine - ANSWERBasophil
Injury to a blood vessel that causes it to constrict, slowing the clod of blood. -
ANSWERVascular phase of Hemostasis
Preferred site for a venipuncture - ANSWERAntecubital Fossa
, Test used to evaluate the intrinsic pathway and monitor heparin therapy -
ANSWERAPTT also know as PTT
Test used to evaluate the extrinsic pathway and also used to monitor warfarin therapy -
ANSWERPT
Fibrinolysis - ANSWERBreakdown and removal of a clot
Converts the temporary platelet plug in a stable fibrin clot - ANSWERCoagulation Phase
2nd choice vein for venipuncture and most often the only one palatable in an obese Pt. -
ANSWERCephalic vein
Antiseptics used in Phlebotomy - ANSWER70% isopropyl alcohol pads most common,
provolone - iodine for BC,s and Chlorhexidine gluconate for patients that are allergic to
Betadine/ Iodine
Length of needle commonly used in venipuncture - ANSWER1 inch (up to 1.5")
Average gauge of needle used for drawing blood - ANSWER21-22
Gauge of needle that can cause hemolysis - ANSWERsmaller than 23 gauge
3 skills of the phlebotomist - ANSWERSocial, clerical, technical
Analytical errors during collection of blood - ANSWERExtended tourniquet time,
hemolysis, wrong order of draw, failure to invert tubes, faulty technique under filling
tubes
Analytical errors before collection of blood - ANSWERPatient misidentification, improper
time, wrong tubes, not fasting, exercise (Cortisol levels), Pt. Posture, Poor coordination
with other treatments, improper site prep, medication interference
Analytical errors After collection of blood - ANSWERFailure to separate serum from cell
(Glycolisis), improper use of serum separator (Not inverting tubes or not spinning
tubes), delays in processing, exposure to light, improper storage conditions, dimming
clots
Fistula - ANSWERPermanent surgical connection between an artery and a vein, never
used for venipuncture
Edima - ANSWERAccumulation of fluid in tissue
Thrombophlebitis - ANSWERInflammation of a blood clot formation
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