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Physiology Lab 1: Methods of Drawing Blood

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Questions and Answers

What is the primary function of a clot activator in a blood collection tube?

To separate the blood components
To prevent the blood from clotting
To accelerate clotting of the blood (correct)
To preserve the blood sample for a longer period

What type of blood sample is produced when a tube contains an anticoagulant?

Blood cells
Serum
Plasma (correct)
Whole blood

What is the purpose of a tourniquet in blood sample drawing?

To hold the needle in place
To apply pressure after the prick
To disinfect the skin
To restrict blood flow to the vein (correct)

Why are some transfer and storage tubes required to be freezable?

For long-term storage at a low temperature (D) Signup and view all the answers

What is the purpose of a centrifuge in handling blood samples?

To separate the blood components (D) Signup and view all the answers

What is the purpose of a needle disposal box in blood sample drawing?

To dispose of the used needles safely (C) Signup and view all the answers

What is the primary reason for selecting the antecubital area for drawing blood?

It is easily accessible and visible (A) Signup and view all the answers

What is the purpose of wiping the skin with cotton and an alcoholic solution?

To sterilize the skin (A) Signup and view all the answers

What is the characteristic of arterial blood that distinguishes it from venous blood?

It has a higher oxygen concentration (A) Signup and view all the answers

Why should the arm be bent and a cotton ball applied to the puncture site after drawing blood?

To prevent bleeding (C) Signup and view all the answers

What should be done to the syringe before drawing blood?

It should be checked for quality and closed (C) Signup and view all the answers

Why is the antecubital vein preferred over its neighbors?

It is more stable (D) Signup and view all the answers

What is the primary function of the additive in a light blue tube?

To prevent blood from clotting (C) Signup and view all the answers

Which type of tube is used for hematology and blood bank tests?

Tube with potassium EDTA (B) Signup and view all the answers

What is the purpose of the additive in a tube with sodium fluoride and sodium or potassium oxalate?

To inhibit glycolysis and prevent clotting (C) Signup and view all the answers