Does cardiac output change next to metabolic rate? If metabolic rate increases by 10-fold, for example, by what fa
Answer:
To an extent, yes. If metabolic rate goes up, next oxygen delivery must step up. This can be done by a couple ways. First, the cardiac output can go up. But, even when the cardiac output doesn't dance up by enough, next the percentage of oxygen extracted from the blood increases. So, the oxygen saturation of mixed venous blood in a regular party might be around 70% or so, but may drop to reflect the increase within oxygen consumption. I'm not sure, though, if there is a fixed route to predict how the body will respond. I'm sure it also depends on things like how the metabolic rate increases (stress v. infection v. exercise) etc.
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