The physical fitness of athletes is measured by 'VO 2 max,' which is the maximum volume of oxygen consumed by an individual during incremental exercise (for example, on a treadmill). An average male has a VO 2 max of 45 mL O 2 /kg body mass/min, but a world-class male athlete can have a VO 2 max reading of 88.0 mL O 2 /kg body mass/min. (a) Calculate the volume of oxygen, in mL, consumed in 1 hr by an average man who weighs 85 kg and has a VO 2 max reading of 47.5 mL O 2 /kg body mass/min.

Hi everyone today, we have a question telling us the oxygen saturation is the measure of how much oxygenated hemoglobin is present in the blood relative to the total hemoglobin. For a healthy individual, the oxygen saturation must remain at least 94% at all times An average human body contains 5.0 L of blood. While there is 13.2 to 16.6 g per deciliter hemoglobin in the blood of a mill. And our goal here is using an average of 14.9 g per death liter of hemoglobin in the blood. And that one g of hemoglobin carries 1.39 millions of oxygen, calculate the volume of oxygen in milliliters present in the blood. So we're going to start off with our 15 R five point zero leaders of blood times one guests later of blood over 10 to the -1. Leaders of blood times 14 0. hemoglobin over one desa later of blood Times 94g of oxygenated hemoglobin. Over 100 g total hemoglobin Because it gave us to us in a percentage. So that is out of 100. And then we're going to multiply that by one point milliliters of oxygen over one g of hemoglobin. So our leaders of blood are canceling out our desks, liters of blood are canceling out our total hemoglobin is canceling out and our oxygenated hemoglobin is counseling out. So our final answer is milliliters. Thank you for watching. Bye

Ch.10 - Gases

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Problem 46a

Chapter 10, Problem 46a

The physical fitness of athletes is measured by 'VO₂ max,' which is the maximum volume of oxygen consumed by an individual during incremental exercise (for example, on a treadmill). An average male has a VO₂ max of 45 mL O₂/kg body mass/min, but a world-class male athlete can have a VO₂ max reading of 88.0 mL O₂/kg body mass/min. (a) Calculate the volume of oxygen, in mL, consumed in 1 hr by an average man who weighs 85 kg and has a VO₂ max reading of 47.5 mL O₂/kg body mass/min.

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Identify the given values: VO_2 max = 47.5 \text{ mL O}_2/\text{kg body mass/min}, \text{weight} = 85 \text{ kg}, \text{time} = 1 \text{ hr}.

Convert the time from hours to minutes: 1 \text{ hr} = 60 \text{ min}.

Calculate the total volume of oxygen consumed per minute by multiplying VO_2 max by the weight: \text{Volume per minute} = 47.5 \text{ mL O}_2/\text{kg/min} \times 85 \text{ kg}.

Calculate the total volume of oxygen consumed in 1 hour by multiplying the volume per minute by the total number of minutes: \text{Total volume} = \text{Volume per minute} \times 60 \text{ min}.

The result from the previous step gives the total volume of oxygen consumed in mL.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

VO2 max

VO2 max, or maximal oxygen uptake, is a measure of the maximum amount of oxygen that an individual can utilize during intense exercise. It is expressed in milliliters of oxygen consumed per kilogram of body mass per minute (mL O2/kg/min). This metric is crucial for assessing an athlete's aerobic endurance and overall cardiovascular fitness.

Unit Conversion

In this context, unit conversion is necessary to calculate the total volume of oxygen consumed over a specific time period. Since VO2 max is given in mL O2/kg/min, it is essential to convert this rate into a total volume for the entire hour by multiplying by the individual's weight and the number of minutes in an hour (60).

Metabolic Rate

Metabolic rate refers to the rate at which the body expends energy or consumes oxygen during physical activity. Understanding metabolic rate is important for interpreting VO2 max values, as it reflects the efficiency of the body's energy systems and its ability to sustain prolonged exercise, which is particularly relevant for athletes.

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