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MEDICAL ASSISTANT EXAM/ACTUAL
QUESTIONS AND ANSWERS 100% PASS
What are the 3 veins that are located in the antecubital fossa? - ANS -Median cubital vein
-Cephalic vein
-Basilic vein
Tiger Top & Red Top Tube
-Additives?
-Common Tests?
-How many times do you invert?
-What part of the lab does this tube go to? - ANS Tiger:
Serum Separator tube (SST)
Additive: Glass particles, silica, & thixotropic gel.
Tests: chemistry, lipids, cardiac enzymes (CKMB & Troponin)
Invert: 8 times
Red:
Additive: None
Tests: chemistry
Invert: 0
, ©THESTAR 2025 ALL RIGHTS RESERVED
Chemistry part of the lab
Gray Top Tubes
-Additives?
-Common Tests?
-How many times do you invert?
-What part of the lab does this tube go to? - ANS Additives: Sodium fluoride & Potassium
Oxalate
Common tests: Fasting blood sugar, Glucose tolerance test (GTT), blood alcohol levels, and
lactic acid measurements
Invert: 8 times
Chemistry part of the lab
Green Top Tubes
-Additives?
-Common tests?
-How many times do you invert?
-What part of the lab does this tube go to? - ANS Additives: Heparin, Sodium, lithium or
ammonium-ion
Tests: Ammonia, Carboxyhemoglobin, and STAT electrolytes
Invert: 8 times
Chemistry part of the lab
, ©THESTAR 2025 ALL RIGHTS RESERVED
Lavender Top Tube
-Additives?
-Common tests?
-How many times do you invert?
-What part of the lab does this tube go to? - ANS **MUST fill tube 2/3**
Additives: EDTA (Ethylenediaminetetraacetic acid)
Tests: CBC (RBC, WBC, and Platelet), WBC differential, Hemoglobin & Hematocrit
determinations, Erythrocyte sedimentation Rate (ESR)/ SED rate, sickle cell screening, and lead
levels.
Invert: 8 times
Hematology part of the lab
Light Blue Top Tube
-Additives?
-Common Tests?
-How many times do you need to invert?
-What part of the lab does this tube go to? - ANS **Needs to be filled completely**
**9 parts blood to 1 part sodium**
Additives: Sodium Citrate
Common tests: Prothrombin Time (PT), Coumadin Therapy, Activated Partial Thromboplastin
Time (PTT), Monitors heparin therapy and bleeding time.
, ©THESTAR 2025 ALL RIGHTS RESERVED
Invert: 3-4 times
Hematology part of the lab
What is the order of draw? - ANS 1- Sterile
2- Light Blue
3- Red / Tiger Top
4- Green
5- Lavender
6- Gray
What is a hematoma? - ANS The most common complication in plebotomy. This indicated
that blood has accumulated in the tissue surrounding the vein.
Causes: The needle going through the vein, and failure to apply enough pressure on the site
after needle withdrawal.
What are some factors to consider prior to performing venipuncture? - ANS -Fasting
-Edema
-Fistula
What are petechiae? - ANS Tiny non-raised spots that appear on the skin from rupturing of
the capillaries due to the tourniquet being left on too long or too tight.
(Tiny little bruises)
MEDICAL ASSISTANT EXAM/ACTUAL
QUESTIONS AND ANSWERS 100% PASS
What are the 3 veins that are located in the antecubital fossa? - ANS -Median cubital vein
-Cephalic vein
-Basilic vein
Tiger Top & Red Top Tube
-Additives?
-Common Tests?
-How many times do you invert?
-What part of the lab does this tube go to? - ANS Tiger:
Serum Separator tube (SST)
Additive: Glass particles, silica, & thixotropic gel.
Tests: chemistry, lipids, cardiac enzymes (CKMB & Troponin)
Invert: 8 times
Red:
Additive: None
Tests: chemistry
Invert: 0
, ©THESTAR 2025 ALL RIGHTS RESERVED
Chemistry part of the lab
Gray Top Tubes
-Additives?
-Common Tests?
-How many times do you invert?
-What part of the lab does this tube go to? - ANS Additives: Sodium fluoride & Potassium
Oxalate
Common tests: Fasting blood sugar, Glucose tolerance test (GTT), blood alcohol levels, and
lactic acid measurements
Invert: 8 times
Chemistry part of the lab
Green Top Tubes
-Additives?
-Common tests?
-How many times do you invert?
-What part of the lab does this tube go to? - ANS Additives: Heparin, Sodium, lithium or
ammonium-ion
Tests: Ammonia, Carboxyhemoglobin, and STAT electrolytes
Invert: 8 times
Chemistry part of the lab
, ©THESTAR 2025 ALL RIGHTS RESERVED
Lavender Top Tube
-Additives?
-Common tests?
-How many times do you invert?
-What part of the lab does this tube go to? - ANS **MUST fill tube 2/3**
Additives: EDTA (Ethylenediaminetetraacetic acid)
Tests: CBC (RBC, WBC, and Platelet), WBC differential, Hemoglobin & Hematocrit
determinations, Erythrocyte sedimentation Rate (ESR)/ SED rate, sickle cell screening, and lead
levels.
Invert: 8 times
Hematology part of the lab
Light Blue Top Tube
-Additives?
-Common Tests?
-How many times do you need to invert?
-What part of the lab does this tube go to? - ANS **Needs to be filled completely**
**9 parts blood to 1 part sodium**
Additives: Sodium Citrate
Common tests: Prothrombin Time (PT), Coumadin Therapy, Activated Partial Thromboplastin
Time (PTT), Monitors heparin therapy and bleeding time.
, ©THESTAR 2025 ALL RIGHTS RESERVED
Invert: 3-4 times
Hematology part of the lab
What is the order of draw? - ANS 1- Sterile
2- Light Blue
3- Red / Tiger Top
4- Green
5- Lavender
6- Gray
What is a hematoma? - ANS The most common complication in plebotomy. This indicated
that blood has accumulated in the tissue surrounding the vein.
Causes: The needle going through the vein, and failure to apply enough pressure on the site
after needle withdrawal.
What are some factors to consider prior to performing venipuncture? - ANS -Fasting
-Edema
-Fistula
What are petechiae? - ANS Tiny non-raised spots that appear on the skin from rupturing of
the capillaries due to the tourniquet being left on too long or too tight.
(Tiny little bruises)
