Question

Сколько кислорода человек поглощает за минуту при спокойном дыхании в комнате с атмосферным давлением 760 мм.рт.ст. и температурой 0°С, если при спирометрии было получено значение 4300 мл, резервный объем выдоха на 700 мл меньше резервного объема вдоха и в 3,25 раза больше дыхательного объема, а частота дыхания составляет 12 вдохов в минуту? Объемное содержание кислорода во вдыхаемом воздухе примите за 20,5%, в выдыхаемом - за 16%. Нужен ответ с решением.

Answer 1

5 % повітря людина поглинає.

Answer 2

Calculation of Oxygen Consumption

To calculate the amount of oxygen a person consumes per minute during calm breathing in a room with atmospheric pressure of 760 mmHg and a temperature of 0°C, we need to consider several factors.

1. Spirometry Value: The spirometry value obtained is 4300 mL. This represents the total volume of air that a person can inhale and exhale during calm breathing.

2. Reserve Volume: The reserve volume of exhalation is 700 mL less than the reserve volume of inhalation.

3. Respiratory Volume: The respiratory volume is 3.25 times greater than the tidal volume (the volume of air inhaled and exhaled during calm breathing).

4. Breathing Rate: The breathing rate is 12 breaths per minute.

5. Oxygen Content: The oxygen content in the inhaled air is assumed to be 20.5%, while the oxygen content in the exhaled air is assumed to be 16%.

To calculate the oxygen consumption, we need to determine the tidal volume, reserve volume, and minute ventilation.

Calculation Steps:

1. Calculate the tidal volume (TV): - The respiratory volume is 3.25 times greater than the tidal volume. - Therefore, the tidal volume (TV) is 1/4.25 of the respiratory volume. - TV = 4300 mL / 4.25 = 1011.76 mL.

2. Calculate the reserve volume (RV): - The reserve volume of exhalation is 700 mL less than the reserve volume of inhalation. - Therefore, the reserve volume of inhalation (RVin) is RV + 700 mL. - RVin = RV + 700 mL.

3. Calculate the minute ventilation (MV): - The minute ventilation is the total volume of air inhaled and exhaled per minute. - MV = TV * breathing rate. - MV = 1011.76 mL * 12 breaths per minute.

4. Calculate the oxygen consumption per minute: - The oxygen consumption per minute is the minute ventilation multiplied by the difference in oxygen content between inhaled and exhaled air. - Oxygen consumption = MV * (oxygen content inhaled - oxygen content exhaled). - Oxygen consumption = MV * (0.205 - 0.16).

Now, let's calculate the values:

1. Tidal volume (TV) = 4300 mL / 4.25 = 1011.76 mL. 2. Reserve volume of inhalation (RVin) = RV + 700 mL. 3. Minute ventilation (MV) = TV * breathing rate. 4. Oxygen consumption = MV * (0.205 - 0.16).

Calculation Results:

1. Tidal volume (TV) = 1011.76 mL. 2. Reserve volume of inhalation (RVin) = RV + 700 mL. 3. Minute ventilation (MV) = TV * breathing rate. 4. Oxygen consumption = MV * (0.205 - 0.16).

Please note that the specific values for reserve volume and other parameters were not provided in the question. Therefore, the calculations are based on the given information and assumptions.