Choose an antagonistic pair of muscles:

Identify the muscle labeled number 1:

Name the following muscle in the upper leg:

Which type of muscle tissue can be found in humans?

Tendons connect:

Which letter represents a muscle fiber?

Which letter represents a myofibril?

Ca+ ions bind with Troponin which removes the blocking action of __________________ from the Actin binding sites.

Myosin binds with actin and forms ______________ which begins the contraction process.

Actin filaments pull the myosin inward to contract.

When contraction occurs, sarcomeres are shortened.

Each sarcomere consists of alternating thin and thick protein filaments called __________________.

As long as Ca+ and ________ are available, contraction can continue.

Come on, what's the study of life?