Cross Bridge Cycle

What is the fundamental unit of a muscle?

• Myofibril

• Sarcomere

• Actin

• Myosin

What structure has a globular head? (Two golf clubs)

• Actin

• Myosin

• Sarcomere

• Myofibril

What protects the sarcomere from overstreching?

• Actin

• Titin

• Myosin

• Myofibril

The cross-bridge cycle converts ________ energy from ATP into force and kinetic energy, which when summed together generates the contraction. 

• Chemical

• Free

• Kinetic

• Potential

In skeletal muscle, what is released when depolarization ocurrs?

• Actin

• Elastin

• Whey

• Calmodulin