When ATP levels are low, the relationship between ATP and creatine phosphate is that
A)ATP supplies energy to synthesize creatine phosphate from creatine and phosphate.
B)creatine phosphate supplies energy to regenerate ATP from ADP and phosphate.
C)both have three phosphate groups.
D)both are required to stimulate a muscle to contract.

Question

Quizplus · Accepted Answer

When ATP levels are low, creatine phosphate supplies energy to regenerate ATP from ADP and phosphate through the enzyme creatine kinase. This helps maintain ATP levels and sustain muscle contraction. Both ATP and creatine phosphate have three phosphate groups, but that is not relevant to their relationship when ATP levels are low. Option A is incorrect because ATP cannot synthesize creatine phosphate. Option D is incorrect because while both are required for muscle contraction, their relationship when ATP levels are low is specifically about energy production and regeneration.

When ATP Levels Are Low, the Relationship Between ATP and Creatine