When a muscle fiber contracts, the I bands diminish in size, the H zones disappear, and the A bands move closer together but do not diminish in length.

A common injury to the ankle occurs by excessive turning of the sole inward, called

_____ – cylindrical structure that consists of myofilaments; actively shorten; when they contract the entire muscle cell shortens

Isometric contractions produce:

There is limited movement between the ribs and the sternum. Such joints are classified structurally as

When energy reserves in a muscle are exhausted and lactic acid levels increase, ________ occurs.

Bonus A nursing infant develops a powerful sucking muscle that adults also use for whistling or blowing a trumpet called the:

Bonus Which of the following muscles is NOT involved in dorsiflexion and/or plantar flexion of the foot:

Place these structures of the skeletal muscle in order from largest to smallest:  

Which statement about excitation-contraction coupling is incorrect?