One Drop of Coombs' Control Cells Was Added to a Negative

question 47

Multiple Choice

One drop of Coombs' control cells was added to a negative antibody screen. No agglutination was observed after centrifugation. What course of action is taken?

• A) Report negative result
• B) Report inconclusive result
• C) Repeat the test
• D) Add one more drop of check cells and re-centrifuge

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Definitions:

Regulating Heartbeat

The management and control of the rate at which the heart beats, typically through the autonomic nervous system and hormonal signals.

Phonetic Method

An approach to teaching reading and spelling that emphasizes sound-symbol relationships and the sounding out of words.

Sight Vocabulary

Words that are immediately recognized on the basis of familiarity with their overall shapes, rather than decoded.

Rote Learning

A memorization technique based on repetition, often without an understanding of the reasoning or relationships behind the information.