What is shown in the colored part of this diagram?

What is labeled "4" (the blue/purple part) in the diagram?

Name the following in order from largest to smallest:

What is the length between Z-lines of an actin molecule called?

____________ attaches to actin to form the cross bridge.

Which molecules bind to the actin molecule in a way that prevents a myosin head from forming a cross bridge?

Which molecule supplies energy for the flexing of the myosin head "power stroke".

Which molecule has a movable head that provides a power stroke when activated?

Which molecule forms the majority of the thin filament?

What molecule binds to the blocking molecules, causing them to move and expose the myosin binding site?

Another name for a muscle cell

Which type of muscle tissue is attached to the skeleton and is responsible for the movement of bone around joints or movement of some organs?

What is the name of the theory of how actin and myosin filaments slide past each other to produce muscle contractions?

The smallest unit of contraction is the

Which type of muscle tissue is involuntary?

This structure stores calcium in the muscle cell

What is not a function of the muscular system?

Identify the I band in the diagram above.

What is the name of the connective tissue covering a fascicle?

Which structures are inward extensions of the muscle cell's membrane?

What is another name #2? (Hint: It is a muscle layer)

What is another name #6? (Hint: It is a muscle layer)

What is the name of #3?

What is another name for #10?