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ADA NBDE National Board Dental Part I

Category - NBDE

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Which of the following compounds directly functions in excitation contraction, producing smooth but not skeletal muscle?

actin
calcium
myosin
myosin light chain kinase

Explanation

Answer: D - In smooth muscle, increased cytoplasmic [Ca2+] activates myosin light chain kinase, which acts to phosphorylate the light chain of the myosin molecule.

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ADA NBDE National Board Dental Part I

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ADA NBDE National Board Dental Part I

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