What Causes Numbness and Tingling in the Fingers of Individuals

question 17

Multiple Choice

What causes numbness and tingling in the fingers of individuals with untreated pernicious anemia?

• A) Persistent hyperbilirubinemia
• B) Increasing acidosis affecting metabolism
• C) Vitamin B₁₂ deficit causing peripheral nerve demyelination
• D) Multiple small vascular occlusions affecting peripheral nerves

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Definitions:

Binding Site

A specific region on a protein or enzyme where a particular molecule, such as a substrate, hormone, or drug, can form a stable complex, initiating a biological action.

Secondary Active Transport

involves the movement of substances across a cell membrane utilizing energy indirectly from the electrochemical gradient established by primary active transport.

Concentration Gradient

A difference in the concentration of a substance across a distance, leading to substances moving from an area of high concentration to one of lower concentration.

Carrier Molecule

A protein that facilitates the transport of specific substances across a cell membrane by changing its shape.