★ Enzymes and ATP Structure Quiz
a reaction that absorbs heat energy
A. exothermic reaction
B. catabolic reaction
C. spontaneous reaction
D. endothermic reaction
Select your answer:

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Musculoskeletal System Responses to Exercises › ViewWhat is the role of calcium ions in muscle contraction?
A. Initiate muscle relaxation
B. Activate troponin to expose binding sites on actin
C. Generate ATP for cross-bridge formation
D. Stabilize the sarcomere structure
Embryology › View
The Law of Crosscutting states that a fault or intrusion is __________ than the bodies of rock it cuts through.
A. younger
B. older
C. funnier
D. nastier