In which species are erythrocytes elliptical, non-nucleated, and lacking a central pallor?

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Study for the VTNE Laboratory Procedures Test. Use flashcards and multiple choice questions, each question offers hints and explanations, enabling increased understanding and retention. Prepare effectively for your exam!

Multiple Choice

In which species are erythrocytes elliptical, non-nucleated, and lacking a central pallor?

Explanation:
This question tests knowledge of how red blood cell shape varies by species. Most mammals have non-nucleated, biconcave erythrocytes with a visible central pallor. Birds and reptiles, on the other hand, have nucleated red blood cells. Among the animals listed, the camelids (llama) stand out because their red blood cells are elliptical (oval) and non-nucleated, and this shape reduces or eliminates the central pallor seen in round mammalian cells. That combination—elliptical, non-nucleated, and lacking central pallor—points to the llama.

This question tests knowledge of how red blood cell shape varies by species. Most mammals have non-nucleated, biconcave erythrocytes with a visible central pallor. Birds and reptiles, on the other hand, have nucleated red blood cells. Among the animals listed, the camelids (llama) stand out because their red blood cells are elliptical (oval) and non-nucleated, and this shape reduces or eliminates the central pallor seen in round mammalian cells. That combination—elliptical, non-nucleated, and lacking central pallor—points to the llama.

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