Answer :
Final answer:
For a microhematocrit testing, the best option would typically be a single heparinized plastic capillary tube.
So, the correct answer would be C.
Explanation:
Microhematocrit testing involves taking a small blood sample to measure the volume percentage of red blood cells (erythrocytes) in a sample of centrifuged blood, which is referred to as hematocrit or packed cell volume.
A heparinized plastic capillary tube is often used because heparin acts to prevent coagulation of the blood sample, thereby ensuring that the sample remains free-flowing and suitable for the subsequent analysis. The tube is then centrifuged, which separates the blood into layers - the erythrocytes being one layer. This layer's volume as a percentage of the total forms the hematocrit.
So, the correct answer would be C.
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