WBCS.LIVE practice question

Consider the following statements regarding human respiration: 1. The 'Bohr effect' describes how high concentrations of CO2 and low pH heavily decrease the blood's affinity for oxygen. 2. The vast majority of carbon dioxide is transported in human blood simply as a dissolved gas in the blood plasma. Which of the statements given above is/are correct?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. Only 1
  2. Only 2
  3. Both 1 and 2
  4. Neither 1 nor 2

Correct answer and explanation

Correct answer: Only 1

Explanation: āœ… Correct Answer: A) Only 1 šŸ“š Explanation: Statement 1 is absolutely correct; the Bohr effect explains how an increase in blood CO2 (which lowers pH) forces hemoglobin to release its oxygen precisely where heavily working tissues need it most. Statement 2 is entirely incorrect; nearly 70% of CO2 is transported chemically converted as bicarbonate ions (HCO3-) in the plasma, not as a simple dissolved gas.