Question

QUESTION 16

1. What does the arteriovenous oxygen difference describe?

   	A.	The range of oxygen content in blood from forced exhale to inhaled deep breath
   	B.	The difference in oxygen content in the blood pre- and post-exercise
   	C.	The difference in oxygen content of arterial blood and mixed-venous blood
   	D.	The amount of oxygen attached to hemoglobin immediately preceding a breath

Answer 1

C) the difference in oxygen content of arterial blood and mixed venous blood

Arteriovenous oxygen difference is basically the difference in the concentration of oxygen within blood in the arterial blood and venous blood. Understanding this difference helps in finding out how much oxygen has been removed from the capillary blood while the blood is circulation within the body. Generally its value can be determined by finding out the concentration of the oxygen in the oxygenated blood which goes into the arteries and the concentration of oxygen present within the deoxygenated blood from the blood supply of the pulmonary artery.

The first option is not correct because the oxygen content during forced exhalation and forced inhale helps in determining how much oxygen is taken and amount of the C02 which is released from the body.

The second option is not correct because the difference in concentration of oxygen in pre and post exercise helps in determining how much oxygen supply is reaching the muscles as the requirement tends to increase.

The 4th option is not correct as amount of hemoglobin in blood determined available in the oxygen before inhalation and this has nothing to do with determining the oxygen concentration in artery and venous.