A Normal M:E Ratio Is About 3:1

question 26

Multiple Choice

A normal M:E ratio is about 3:1.Why are there three times more myeloid precursors than erythroid precursors in the bone marrow?

• A)Because the body needs more cells to fight infection than to transport oxygen
• B)Because the life cycle of a WBC is much longer than that of an RBC
• C)Because WBCs undergo more steps in hematopoiesis than do RBCs
• D)Because the life cycle of a WBC is much shorter than that of an RBC

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Definitions:

Volcanic Conduit

A pipe-like structure through which magma moves from a magma chamber to the Earth's surface.

Diamond Pipe

A steep, cylindrical- to funnel-shaped volcanic conduit that contains diamonds dispersed in an igneous rock; synonym kimberlite pipe.

Copper Veins

Concentrated occurrences of copper minerals found within rock formations, often extracted through mining.

Impermeable Unit

A geological formation that does not allow fluids to pass through it due to its material composition or structure.