SCIENCE
ZOOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Shallower and slow
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There is no effect on breathing
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Slow and deep
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Faster and deeper
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Detailed explanation-1: -When CO2 concentration in blood increases, breathing becomes faster and deeper. The effect of rising CO2 concentration is due to decrease in affinity of Hb for O2. Thus, the CO2 released in the tissues accelerates the delivery of O2 (called Bohr effect), due to-which breathing becomes faster and deeper.
Detailed explanation-2: -As levels of CO2 in the blood begin to rise, the body can respond through hyperventilation or hypoventilation, respectively. The CO2 that is bound to hemoglobin forms a carbamino compound. In circumstances where the CO2 and H+ concentrations are high, the affinity of hemoglobin for O2 is decreased.
Detailed explanation-3: -Carbon dioxide (CO2) increases cerebral blood flow and arterial blood pressure. Cerebral blood flow increases not only due to the vasodilating effect of CO2 but also because of the increased perfusion pressure after autoregulation is exhausted.
Detailed explanation-4: -These changes are sensed by central chemoreceptors, which are located in the brain, and peripheral chemoreceptors, which are located in the aortic arch and carotid arteries. A rise in carbon dioxide or a decline in oxygen levels in the blood stimulates an increase in respiratory rate and depth.