Energy metabolism in the heart is characterized by all of the following EXCEPT:
A) the preferred fuel is fatty acids.
B) it has minimal energy reserves.
C) it is unusually rich in mitochondria.
D) the heart consumes over 90% of the total oxygen supply during maximal physical exertion.
E) the range of activity is much less than that in muscle (200 fold).

Question

Quizplus · Accepted Answer

The heart does not consume over 90% of the total oxygen supply during maximal physical exertion; this statement is incorrect. The heart is efficient in oxygen use but does not monopolize the body's oxygen supply to that extent.

Energy Metabolism in the Heart Is Characterized by All of the Following