QUESTION 16 Fill in the blanks with the correct words 8Increasing the pCO2 of bl

Question

QUESTION 16 Fill in the blanks with the correct words 8Increasing the pCO2 of blood will 8. Increasing the pCO2 of blood will A. Increasing CSF [HI will C. Decreasing arterial pO2 from 100mm Hg to 99 mm Hg will A. increase decrease have little or no effect on blood pH. CSF pH firing of central chemoreceptors. the firing rate of mammalian peripheral chemoreceptors. During hyperventilation, pCO2 will A. A drop in plasma p02 will central chemoreceptor firing rate QUESTION 17 Choose the correct answer to complete the statement: Air moves out of the lungs because O the gas pressure in the lungs is less than outside pressure. Intrathoracic pressure incrcascs during cxpiration. the thorax is muscular O contraction of the diaphragm increases the volume of the pleural cavity All of the above answers are correct. QUESTION 18 Fill in the blanks with the correct words A. During inspiration, irntra-alveloar pressure is The tidal volume is The intra-alveolar pressure when the diaphragm contracts is almospheric pressure less tha equal to greater than thc amount of fresh air that reaches the alveoli plus the doad spacc volume the intra-alveolar pressure when the diaphragm relaxes the partial pressure of carbon dioxide in The partial pressure of carbon dioxide in the blood leaving the lungs via the pulmonary vein is the alveolar air At normal partial pressures in the capillaries, the percent of carbon dioxide in the blood that is bound to hemoglobin is the peroant of oxygen in the blood that is bound to hemaglohin QUESTION 19 The cells that respond to changes in blood gas concentration and generate the respiratory rhythm are found in several nuclei in the Click Save and Submit to save and submit. Click Save All Answers to save all ansavers.

Explanation / Answer

16.
i) Ans- B. decrease
Explanation:
When carbon dioxide reacts with water, it produces carbonic acid. Increasing CO2 results in a decreased pH of blood.On the other hand, decreasing carbon dioxide results in an increase in pH.
ii) Ans- B. decrease
Explanation:
An increasing carbon dioxide results tension of the arteries decreased CO2 output, blood becomes more acidic. A change in pH unable to stimulate central chemoreceptors. Increasing the pCO2 results an increase in the pH.
iii)Ans- A. Increase
Explanation:
Increasing PaCO2 results an increasing arterial [H+] that increase its firing rate.
iv) Ans- C. Have little or no effect on
Explanation:
The peripheral chemoreceptors are to increasing PO2 and decreasing pH, and PCO2. They increase its firing rate when
(1) the Po2 or pH become low
(2) the Pco2 of blood is increased,
(3) very low or stopped body flow
(4) a chemical that blocks oxidative metabolism in the chemoreceptor cells.

v) Ans-A) increase
Explanation:
During hyperventilation, pCO2 quickly increases and pH decrease, the pH is fall due to that carbon dioxide combine.
vi) Ans- A. increase
Explanation:
Low arterial PO2 increases ventilation. The central chemoreceptor increasing the firing rate by increasing CO2 and decreased O2. Increased CO2

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