The coronary arteries deliver blood to heart musole cells. a Figure 8 shows the average coronary blood flow per minute for two groups of volunteers,
Group 1 is made up of ten volunteers who do not smoke cigarettes.
Group 2 is made up of ten volunteers who do smoke cigarettes,
Group
Coronary blood flow (cm/min)
At rest During exercise
0.90
3,37
0.93
2.22
1
2
1
Figure 5
When Group 1 volunteers exercise their blood flow increases by 274%
Calculate the percentage increase in coronary blood flow for the Group 2 volunteers.
%
percentage increase in coronary blood flow

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