[单选题]
Suppose that the build-umj/h:i c8n( wlp i2)mz g:fzlc7nj.6 idof fatty tissue on the wall of an artery decreased the radius by 10%. By how much would the pressure provided by the heart have:cz7fldg 6.n)zi 2mij to be increased to maintain a constant blood flow?
