Multiple Choice
When troponin binds calcium,
A) it allows tropomyosin to bind actin.
B) ion channels open, and sodium rushes into the muscle cells.
C) it changes conformation, twisting tropomyosin and exposing the actin-myosin binding site.
D) it changes conformation, exposing the ATP binding site and allowing the actin-myosin bond to break.
E) calmodulin binds to calcium and starts a cascade by activating myosin kinase.
Correct Answer:
Verified
Correct Answer:
Verified
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