How does the difference between arterial and venous O2 content change during exercise compared to rest?...

How does the difference between arterial and venous O₂ content change during exercise compared to rest? What causes this change in the arterial-venous oxygen difference?

Expert Solution

The arteriovenous oxygen difference is a measure of the amount of oxygen taken up from the blood by the tissues. The greater the amount of oxygen extracted by the tissues, the greater the arteriovenous oxygen difference. Cardiac output and arteriovenous oxygen difference are the two factors that determine the overall oxygen uptake. At rest

Arterial blood will generally contain an oxygen concentration of around 20 mL/100 mL.Venous blood with an oxygen concentration of 15 mL/100 mL would therefore lead to typical values of the a-vO2 diff at rest of around 5 mL/100 mL.

During intense exercise, however, the a-vO2 diff can increase to as much as 16 mL/100 mL due to the working muscles extracting far more oxygen from the blood than they do at rest.

what causes change in arterial venous oxygen difference

During exercise blood flow to the tissues increases,as exercise intensities increase, the muscles increase the amount of oxygen they extract from the blood and haemoglobin dissociates more easily; therefore the arteriovenous oxygen difference widens during exercise. With aerobic training the tissues become more efficient at taking up oxygen; therefore the arteriovenous oxygen difference is still greater in trained individuals.

Sydney Mullin answered 1 year ago

Explain oxygen content as necessary for energy production and differentiate between arterial content and mixed venous...

Explain oxygen content as necessary for energy production and differentiate between arterial content and mixed venous content used in Fick's equation.

The increase in the maximal arterial-mixed venous oxygen difference (a-v O 2 difference) with aerobic training...

The increase in the maximal arterial-mixed venous oxygen difference (a-v O 2 difference) with aerobic training is due to all of the following except: an increase in mitochondria in the muscle. an increase in capillaries in the muscle. an increase in hemoglobin. increase in muscle blood flow.

Explain the relationship between a patient’a O2 content and O2 saturation of hemoglobin?

Describe the interaction between central command, arterial baroreflexes, and skeletal muscle afferents during acute exercise (low...

Describe the interaction between central command, arterial baroreflexes, and skeletal muscle afferents during acute exercise (low intensity to high intensity exercise). Alsoo briefly describe these 3 neural components that mediate acute exercise responses

using the oxyhemoglobin dissociation curve describe the relationship between the O2 delivery cascade and arterial and...

using the oxyhemoglobin dissociation curve describe the relationship between the O2 delivery cascade and arterial and venous O2 content. Provide one (1) physiological reason that might lead to a reduction in arterial O2 content (CaO2) and one (1) reason there would be a decrease in venous O2 content (CvO2).

How does tissue activity level (e.g., exercise) influence O2 unloading?

1/what is the difference between holding a small and large scale webinar? How does this change...

1/what is the difference between holding a small and large scale webinar? How does this change the webinar? 2/Create a DETAILED checklist of how to complete a webinar start to finishWith the each portion of the check sheet you need to detail what you are going to accomplish during this step. 3/ Are there any topics that would not be appropriate for a webinar? Why do you say this?

describe the stroke volume and the factors that affect it during rest and during exercise

3. Provide a reason for the change from normal arterial Po2, and explain how this change...

3. Provide a reason for the change from normal arterial Po2, and explain how this change affects oxygen delivery to Jaden’s tissues.

1. How does the heart rate from the subject at rest, immediately after exercise, and at...

1. How does the heart rate from the subject at rest, immediately after exercise, and at 1 min, and 2 min after exercise compare? Explain the physiology reasons for any differences. 2.What is occurring during the P-Q interval? How do the average P-Q intervals from rest and each time interval compare? How does the average at rest value compare to the "normal" value? 3. How does the average pulse-wave amplitude from rest and each time interval compare? Explain any variations.

Question