One of the Buffers That Contributes to PH Stability in Human

question 107

Multiple Choice

One of the buffers that contributes to pH stability in human blood is carbonic acid (H₂CO₃) .Carbonic acid is a weak acid that,when placed in an aqueous solution,dissociates into a bicarbonate ion (HCO₃^-) and a hydrogen ion (H⁺) .Thus,
H₂CO₃ ↔ HCO₃^- + H⁺
If the pH of the blood increases,one would expect

• A)a decrease in the concentration of H₂CO₃ and an increase in the concentration of HCO₃^-.
• B)an increase in the concentration of H₂CO₃ and a decrease in the concentration of HCO₃^-.
• C)a decrease in the concentration of HCO₃^- and an increase in the concentration of H⁺.
• D)an increase in the concentration of HCO₃^- and a decrease in the concentration of OH^-.

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Definitions:

Composite Volcano

A type of volcano built by the eruption of both lava flows and explosive material, resulting in a layered or composite structure, often found at convergent plate boundaries.

Volcanic Cinders

Small, porous fragments of lava that solidify before hitting the ground, typically ejected during explosive volcanic eruptions and forming cinder cones.

Scoria Cone

A small, steep-sided volcanic cone built from highly vesicular basaltic lava fragments.

Shield Volcano

A type of volcano with broad, gently sloping sides, formed by the eruption of highly fluid lava.