Phlebotomy Exam MCQ: Quiz!

2.

The Smallest Veins in the human body are known as:

Villi
Bronchiole
Venules
Lymph glands

Correct Answer

A. Venules

Explanation

Venules are the smallest veins in the human body. Veins are blood vessels that carry deoxygenated blood back to the heart. Venules are even smaller than veins and are responsible for collecting blood from capillaries and transporting it to larger veins. They have thin walls and are located in various tissues and organs throughout the body. Venules play a crucial role in the circulatory system by facilitating the return of blood to the heart and maintaining proper blood flow.

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3.

The aorta Branches into Smaller divisions called arteries, which in turn branch into even smaller divisions called?

Capillaries
Arterioles
Venules
Lymph glands

Correct Answer

A. Arterioles

Explanation

The aorta branches into smaller divisions called arteries, which then further divide into even smaller divisions called arterioles. Arterioles are small blood vessels that regulate blood flow and control the amount of blood that enters the capillaries. They play a crucial role in maintaining blood pressure and distributing oxygenated blood to various tissues and organs.

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4.

Characteristics of capillaries include:

Having thin-walls
Forming microscopic phatways
Connecting arterioles with venules
All of the above

Correct Answer

A. All of the above

Explanation

Capillaries have thin walls, forming microscopic pathways that connect arterioles with venules. These characteristics allow for the exchange of nutrients, gases, and waste products between the blood and surrounding tissues. The thin walls of capillaries facilitate the diffusion of substances, while their microscopic size enables them to reach even the smallest tissues and organs. Connecting arterioles with venules, capillaries play a crucial role in maintaining proper blood flow and regulating blood pressure. Therefore, all of the given options accurately describe the characteristics of capillaries.

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5.

Capillary blood collection would not be appropriate for which patient type?

Patients who are extremely obese
Infants
Patients who are severely dehydrated
Patients with veins that are difficult to access

Correct Answer

A. Patients who are severely dehydrated

Explanation

Capillary blood collection is appropriate for every patient type listed except for severely dehydrated patients. Capillary blood collection is the preferred method for blood specimen collection in infants and children.

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6.

You are doing a venipuncture on a patient’s arm. Where should you place the tourniquet?

Place it at the puncture site.
Place it below the puncture site.
Place it above the puncture site.
A tourniquet is not advised for this procedure.

Correct Answer

A. Place it below the puncture site.

Explanation

A tourniquet applied above the puncture site will help increase venous pressure in the area where the blood will be obtained. Increased venous pressure makes the veins easier to see and feel, and increases the odds of collecting a specimen on the first try.

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7.

What is a normal blood potassium level?

6.2 mEq/L–7.5 mEq/L
3.5 mEq/L5.0 mEq/L
7.5 mEq/L–9 mEq/L
1.4 mEq/L–3.5 mEq/L

Correct Answer

A. 3.5 mEq/L5.0 mEq/L

Explanation

A normal blood potassium is between 3.5 mEq/L and 5.0 mEq/L. Numbers outside of this range can have a serious negative impact on the body.

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8.

A patient reports an iodine allergy. To be safe, which of the following solutions would you avoid when cleansing his skin for a blood draw?

Alcohol
Hibiclens
Chloraprep
Betadine

Correct Answer

A. Betadine

Explanation

Betadine contains between 9% and 12% iodine, and therefore should be avoided in those with an iodine allergy.

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9.

What is the maximum recommended puncture depth when performing a heel stick on an infant?

0.5 mm
1 mm
3 mm
2 mm

Correct Answer

A. 2 mm

Explanation

A needle stick depth of 2 mm is sufficient to obtain a blood sample but also should not damage nerves or bone. The sample should always be obtained from the flat bottom surface of the heel and not toward the calcaneus.

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10.

Which of the following conditions may complicate tourniquet use?

Addison’s disease
Thyroid tumor
Cushing Sydrome
Sickle Cell disease

Correct Answer

A. Sickle Cell disease

Explanation

Sickle cell disease is an inherited condition that affects the hemoglobin in red blood cells.

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Phlebotomy Exam MCQ: Quiz!

The forearm vein most commonly used for venipuncture is the:

Quiz Preview

The Smallest Veins in the human body are known as:

The aorta Branches into Smaller divisions called arteries, which in turn branch into even smaller divisions called?

Characteristics of capillaries include:

Capillary blood collection would not be appropriate for which patient type?

You are doing a venipuncture on a patient’s arm. Where should you place the tourniquet?

What is a normal blood potassium level?

A patient reports an iodine allergy. To be safe, which of the following solutions would you avoid when cleansing his skin for a blood draw?

What is the maximum recommended puncture depth when performing a heel stick on an infant?

Which of the following conditions may complicate tourniquet use?