A Type-A Person Demonstrates a 3+ Reactivity with A₁ Cells

question 51

Multiple Choice

A type-A person demonstrates a 3+ reactivity with A₁ cells (reverse grouping) . The forward grouping with anti-A is 4+. Therefore, the possibility of a subgroup is excluded. B cells demonstrate a 4+ reaction. The antibody screen is weakly positive at 37°C but shows no reactivity at the AHG phase. An antibody panel is performed and anti-M is identified. The patient phenotypes negative for M antigen. How is the ABO discrepancy resolved?

• A) Perform reverse grouping at 4°C.
• B) Perform reverse grouping with A₁ cells negative for M antigen.
• C) Perform reverse grouping with A₁ cells positive for M antigen.
• D) Perform forward grouping at 4°C.

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Definitions:

Types Of Memories

The classification of memory into different types, such as short-term, long-term, procedural, and episodic memory.

Flashbulb Memories

Highly detailed and vivid memories of specific, often emotionally charged, events that are retained for a long time.

Accuracy Over Time

The degree to which a measurement or calculation maintains its correctness or precision as time progresses.

Information-Processing Theories

Theories that liken human cognition to the workings of a computer, focusing on how information is encoded, stored, and retrieved.