Q. Which among the following usually regulates breathing in Humans?

  • (A) The number of red blood cells
  • (B) The amount of haemoglobin in the blood
  • (C) Inherent genetic control
  • (D) CO2 levels and pH sensors
✅ Correct Answer: (D) CO2 levels and pH sensors

Published by Praveen Singh ⭐ 36.81K Points at 17-Jun-2021 04:59 am in Science

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