Medical Quiz

Topics: Muscles and Movements Quiz

When a muscle contracts

A. both actin and myosin become shorter in length

B. myosin heads pull the actin towards the M line

C. actin heads pull myosin towards H line

D. the sarcomere length increases

Select your answer:
     


Preview next quiz:

What two chemicals are necessary for muscle contraction to occur?

A. Niacin and Potassium

B. Calcium and ATP

C. Sodium and Potassium

D. Ach and Potassium