Exam 17: Muscle Contraction

Based on your knowledge of the structure and function of the muscle cells, explain why you would expect to find multiple mitochondria and nuclei in them under microscopic examination.

Match each term with its corresponding description regarding the sliding-filament theory. -The stimulus to contract the muscle is carried inside the muscle by this structure

Which of the following types of muscle tissue contains cells that have a single nucleus?

The anabolism of protein by muscle cells produces heat for the body.

ATP is made up of adenine, ribose sugar, and three phosphate groups.

Oxygen molecules in the sarcoplasm are bound to the troponin molecule.

Smooth muscle can contract to shorter lengths than skeletal muscles.

When the sarcomere contracts, the A-bands become smaller.

A tetanic contraction is stimulated by a single stimulus.

T-tubules are unique to muscle cells.

A motor unit is most correctly described as a _____ and a motor neuron.

Maintaining muscle tone is one of the few examples of a positive-feedback mechanism in the body.

When a muscle contracts, the muscle always becomes shorter.

Endurance training usually results in muscle hypertrophy.

Explain what is meant by the graded strength principle of muscle contraction.

Which of the following terms describes an isometric contraction?

Skeletal muscle organs contract on the all-or-none principle.

Match each term with its corresponding definition or description. -Protein that blocks the receptor sites on the actin molecule

Muscle has the ability to store oxygen in myoglobin and store glucose as glycogen.

Muscle fibers use creatine phosphate to restore their ATP population.