Questions: Time Remaining 2 Multiple Choice 4 points The central chemoreceptors of the medulla are sensitive to and hence CO2. Cl- OH H+ O2

Time Remaining 2 Multiple Choice 4 points The central chemoreceptors of the medulla are sensitive to and hence CO2. Cl- OH H+ O2
Transcript text: Time Remaing 2 Multiple Choice 4 points The central chemoreceptors of the medulla are sensitive to $\qquad$ and hence $\mathrm{CO}_{2}$. $\mathrm{Cl}-$ OH H+ O 2 Previous
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Solution

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The answer is H+: the central chemoreceptors of the medulla are sensitive to H+ and hence CO2.

Explanation for each option:

  • $\mathrm{Cl}-$: Incorrect. Chloride ions are not the primary factor that central chemoreceptors in the medulla are sensitive to.
  • OH: Incorrect. Hydroxide ions are not the primary factor that central chemoreceptors in the medulla are sensitive to.
  • H+: Correct. Central chemoreceptors in the medulla are sensitive to changes in the concentration of hydrogen ions (H+), which are influenced by the levels of carbon dioxide (CO2) in the blood. An increase in CO2 leads to an increase in H+ concentration, which the chemoreceptors detect.
  • O2: Incorrect. While peripheral chemoreceptors are sensitive to oxygen levels, central chemoreceptors primarily respond to changes in CO2 and H+ concentrations.

Summary: The central chemoreceptors of the medulla are sensitive to H+ and hence CO2.

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