Answer :
Final answer:
The capillary tube used for testing hematocrit levels should be filled until about two-thirds full. This allows for accurate measurement and ensures that the blood settles properly during centrifugation.
Explanation:
The capillary tube used for testing hematocrit levels should be filled until about two-thirds full. This allows for accurate measurement and ensures that the blood settles properly during centrifugation.
When the blood is centrifuged, the heavier erythrocytes settle at the bottom, forming a layer, while the lighter plasma rises to the top. The hematocrit level is then determined by measuring the percentage of blood occupied by erythrocytes.
