A Patient Has a Decreased Vitamin B₁₂ Assay

question 12

Multiple Choice

A patient has a decreased vitamin B₁₂ assay. The Schilling test detects labeled vitamin B₁₂ in the urine when it is given with IF. What is the correct interpretation?

• A) Vitamin B₁₂ assay probably incorrect
• B) PA
• C) Vitamin B₁₂ deficiency that is not PA
• D) Gastric analysis should be performed

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Definitions:

Tissue Representation

An analytical or visual depiction of the arrangement and composition of cells and extracellular matrix in a specific kind of tissue.

Secretion

The process by which substances are produced and discharged from a cell, gland, or organ for a particular function in the organism or for excretion.

Absorption

(1) The movement of nutrients and other substances through the wall of the digestive tract and into the blood or lymph. (2) The process by which chlorophyll takes up light for photosynthesis.

Haversian Canals

Microscopic channels in compact bone that house blood vessels and nerve fibers, part of the bone's nutrient and waste management system.