Which Statement Regarding Carbon Dioxide Transport in the Blood Is

question 62

Multiple Choice

Which statement regarding carbon dioxide transport in the blood is true?

• A) The chloride shift occurs when Cl^- moves out of RBCs in exchange for HCO₃^-.
• B) HCO₃^- dissociates into CO₂ and O₂.
• C) 25% is converted to H₂CO₃ by carbonic anhydrase.
• D) H₂CO₃ dissociates into H⁺ and HCO₃^-.
• E) 93% remains dissolved in plasma as CO₂.

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Definitions:

Receptor

A molecular structure within or on the surface of a cell that binds to specific molecules like hormones or neurotransmitters, triggering a specific cellular response.

Histamine

Substance released from mast cells that causes inflammation.

Allergic Reaction

An immune system response to a foreign substance that is not typically harmful to the body, such as pollen or certain foods.

Local Regulator

A substance (often a small protein or peptide) that acts near its site of secretion to regulate cellular or physiological activities.