2024 - 5 Muscle Physiology - Honors

Front

What binds to myosin head causing myosin to release actin?

Back

ATP

Front

What is the situation in which a muscle loses its ability to contract due to being used strenuously for a long period of time?

Back

Muscle fatigue

Front

What does the Z Line provide attachment for?

Back

Actin

Front

Identify #2 in muscle structure: A- band, I- band, H- zone, Z- line.

Back

H- zone

Front

Which of the following best describes the power stroke?

Back

Myosin filament heads pull on binding sites of the actin filament.

Front

What is the role of ATP in muscle contraction?

Back

ATP provides the energy required for myosin to detach from actin.

Front

Define muscle fatigue.

Back

Muscle fatigue is the decline in ability of a muscle to generate force.

Front

What is the function of troponin in muscle contraction?

Back

Troponin regulates the interaction between actin and myosin.

Front

What is the difference between the A band and I band in muscle fibers?

Back

The A band contains both actin and myosin filaments, while the I band contains only actin filaments.

Front

What happens during the power stroke of muscle contraction?

Back

Myosin heads pivot, pulling actin filaments toward the center of the sarcomere.