Students are asked to answer specific questions about the animated interaction between actin and myosin. Students should have prior knowledge of the general terminology of muscle contraction, such as "cross bridge and power stroke" prior to attempting this activity.
Knowledge of muscle contraction terminology, such as cross bridge, power stroke, ATP hydrolysis prior to attempting assignment.
Build on the traditional two-dimensional model of muscle contraction by accurately describing specific steps in an animation. Learn to accurately describe steps in a complex process. Demonstrate mastery beyond memorization.
Text of Learning Exercise:
Answer the following questions. 1. In this animation, two events happen when calcium binds to troponin. Describe these events. 2. What event happens immediately after magnesium binds to the myosin head group? 3. What happens to the position of the myosin head group when ATP binds? 4. What happens to the position of the myosin head group when the ATP is hydrolyzed and ADP is attached to the head group? 5. Why does the actin filament only move in one direction?