Fill in the blanks with the correct words. Increasing the pCO 2 of blood will __

Question

Fill in the blanks with the correct words.

Increasing the pCO2 of blood will _____________ blood pH.

Increasing the pCO2 of blood will ______________CSF pH.

Increasing CSF [H+] will ______________ firing of central chemoreceptors.

Decreasing arterial pO2 from 100mm Hg to 99 mm Hg will _______________ the firing rate of mammalian peripheral chemoreceptors.

During hyperventilation, pCO2 will __________________.

A drop in plasma pO2 will _________________ central chemoreceptor firing rate.

increase

decrease

have little or no effect on

  

Increasing the pCO2 of blood will _____________ blood pH.

Increasing the pCO2 of blood will ______________CSF pH.

  

Increasing CSF [H+] will ______________ firing of central chemoreceptors.

Decreasing arterial pO2 from 100mm Hg to 99 mm Hg will _______________ the firing rate of mammalian peripheral chemoreceptors.

  

During hyperventilation, pCO2 will __________________.

A drop in plasma pO2 will _________________ central chemoreceptor firing rate.

Thank you in advance! Answer A.

increase

B.

decrease

C.

have little or no effect on

Explanation / Answer

1.An increase in the partial pressure of carbon dioxide in the blood will decrease the pH as the CO2 is acidic in nature.

2.An increase in pCO2 in CSF (cerebro spinal fluid) decreases the pH of it .

3. The increase in CSF H+ ions will increase the firing of the central chemoreceptors.

4. Decreasing arterial pO2 from 100mm Hg to 99 mm Hg will have little or no effect on the firing rate of mammalian peripheral chemoreceptors. As this is a very minute change.

5.During hyperventilation, the removal of carbon dioxide increases and thus the partial pressure of carbon dioxide decreases.

6. A drop in plams pO2 increases the firing rate of chemoreceptors as they respond to both the lower and increased levels.

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