DI Question 3 2 pts Which of the following would be (a) consequence(s) of breath
ID: 3513618 • Letter: D
Question
DI Question 3 2 pts Which of the following would be (a) consequence(s) of breathing through a snorkel or hose? Reduced alveolar ventilation (VA) Increased dead space Reduced PAO2 (alveolar partial pressure of oxygen) Increased PAC02 (alveolar partial pressure of oxygen) All of the above Question 4 2 pts Which of the following would result in an increase in the amount of O2 which can move from the alveoli to the blood? Increasing the partial pressure of inspired oxygen (Pio2) Reducing the partial pressure of inspired oxygen (Pio2) Pulmonary edema, where fluid buildup increases the distance across which O2 must travel Pulmonary fibrosis, where scarring of the alveoli increases the distance across which O2 must travel. Emphysema, where destruction of the alveoli reduces their surface area.Explanation / Answer
ANS 1-INCREASED DEAD SPACE- A snorkel adds an additional dead space of 160-170 ml and causes an increase in the concentration of CO2 in the inspired gas due to expired air trapped in the snorkel which is then re-inspired.
dead space is the volume of air which is inhaled that does not take part in the gas exchange, either because it (1) remains in the conducting airways, or (2) reaches alveoli that are not perfused or poorly perfused. In other words, not all the air in each breath is available for the exchange of oxygen and carbon dioxide. Mammals breathe in and out of their lungs, wasting that part of the inspiration which remains in the conducting airways where no gas exchange can occur.
ANS-2-- A increasing PiO2 and all other four options has ill effects on gaseous exchange
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