en by pressure gradients within the lungs the gases partial pressure values fluctuate. the formula PN,+PO,+PCO,+PH,O+Pother=Total, applies to calculating the total pressure of gas within the I air is...

Explain why the gas values from the alveolar air to the blood change during pulmonary gas exchange. For example: Alveolar air for CO2 has a value of 40mmHg then when entering the blood shifts to 45mmHg. Why does this occur? I tried to calculate this by using Dalton’s law but I’m not Understanding.

Extracted text: en by pressure gradients within the lungs the gases partial pressure values fluctuate. the formula PN,+PO,+PCO,+PH,O+Pother=Total, applies to calculating the total pressure of gas within the I air is 597+159+0.3+3.0+0.5=760mmHg percent of gas in the alveoli, in order to calculate the partial pressure we use the following formula; 0.137x760 en in the alveolar air. While carbon dioxide makes up 0.3 percent of gas in the alveoli and has a total pressure auses the gases to flow rapidly across the alveolar membrane into the blood stability is quickly achieved. Due t s much lower than the volume of total gaseous air in the alveoli the composition of gases within the blood dec in similar values as illustrated below. COMPOSITION OF GAS EXCHANGE 102 1CO2 ALVEOLAR AIR BLOOD ENTERING AFTER GAS N ANATOMY & PHYSIOLOGY. NEW YORK: PEARSON. LUNGS EXCHANGE Home Er F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 %23 & * 4 6. 7 Y U D G J K C 40 00L * CO 45 40 104