Question 1

Which of the following best describes why capillary specimens obtained from warmed sites are considered 'arterialized'?

Accepted Answer

Because the pressure in arterioles is greater than in venules, causing capillaries to fill with a larger volume of arterial blood.

Question 2

A laboratory technician observes a thin layer of blood spread on a microscope slide to detect morphological abnormalities. What is this layer called?

Accepted Answer

Blood smear/film

Question 3

Which term refers to the blueish tint in skin color due to oxygen deficiency?

Accepted Answer

Cyanosis

Question 4

A patient is found to have a lack of water or fluid in their body. Which term best describes this condition?

Accepted Answer

Dehydrated

Question 5

Which of the following best describes 'capillary action' in the context of blood collection?

Accepted Answer

The free-flowing movement of blood into the micro collection tube without suction.

Question 6

A laboratory report describes a blood smear with a 'feathered edge.' What does this term refer to?

Accepted Answer

A visible curved edge that thins out smoothly and resembles the tip of a bird's feather.

Question 7

Which of the following is a naturally occurring liquid found between gaps/layers of tissue and is a small component of capillary blood specimens?

Accepted Answer

Interstitial tissue fluid

Question 8

A blood sample is described as being collected from 'peripheral circulation.' Where was this sample most likely obtained?

Accepted Answer

Near the surface of the body

Question 9

Which of the following scenarios best illustrates the concept of 'arterialized capillary blood' in a clinical setting?

Accepted Answer

A capillary blood sample is taken from a warmed heel of a newborn.

Question 10

A laboratory technician is preparing a blood smear and wants to ensure proper morphology analysis. Which step is most critical for achieving a good feathered edge?

Accepted Answer

Using a small drop of blood and spreading smoothly at a 30-45 degree angle.

Question 11

Which of the following best explains why interstitial tissue fluid may be present in capillary blood specimens?

Accepted Answer

It naturally seeps into the capillary blood from surrounding tissues during collection.

Question 12

A patient presents with cyanosis. Which of the following laboratory findings would most likely be associated with this condition?

Accepted Answer

Decreased oxygen saturation

Question 13

Which of the following is the best definition of 'capillary action' as it applies to microcollection tubes?

Accepted Answer

The spontaneous movement of blood into the tube without suction, due to surface tension.

Question 14

A blood smear is being evaluated for abnormal cell morphology. Which area of the smear should be examined under the microscope for the most accurate results?

Accepted Answer

The feathered edge

Question 15

Which of the following best describes the main difference between arterialized capillary blood and venous blood?

Accepted Answer

Arterialized capillary blood contains more oxygen due to increased arterial contribution.

Key Terms Related to Blood Collection and Microscopy

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