During a heart attack, blood flow, and therefore oxygen delivery, to the heart muscle is interrupted. How would it change the metabolism of the heart muscle?
A) the rate of lactic acid production would go down
B) the use of glucose in heart muscle would decrease
C) oxidative phosphorylation would slow down
D) All of the choices are correct.

Question

Quizplus · Accepted Answer

During a heart attack, blood flow to the heart muscle is interrupted, which means less oxygen is delivered to the muscle. Without oxygen, the heart muscle is unable to generate energy through oxidative phosphorylation, which is why this process would slow down. Therefore, the best choice is C. Choice A is incorrect because the rate of lactic acid production would actually increase in the absence of oxygen. Choice B is also incorrect because the heart would likely switch to using more glucose since it cannot use oxygen for oxidative phosphorylation.

During a Heart Attack, Blood Flow, and Therefore Oxygen Delivery