Muscle System Test

Front

What is the function of the Tricep brachii LONG head?

Back

The Tricep brachii LONG head is involved in extending the elbow and stabilizing the shoulder joint.

Front

What is ATP and its role in muscle contraction?

Back

ATP (Adenosine Triphosphate) provides energy for the power stroke during muscle contraction.

Front

What is the rectus abdominus?

Back

The rectus abdominus is a muscle located in the front of the abdomen, commonly known as the 'abs', and is responsible for flexing the spine.

Front

What is perimysium?

Back

Perimysium is a connective tissue that surrounds bundles of muscle fibers (fascicles) within a muscle.

Front

What is the pectoralis major?

Back

The pectoralis major is a large muscle in the chest that is responsible for the movement of the shoulder joint.

Front

What are the main functions of skeletal muscles?

Back

Skeletal muscles are responsible for voluntary movements, maintaining posture, and generating heat.

Front

What is the role of calcium ions in muscle contraction?

Back

Calcium ions are released from the sarcoplasmic reticulum and bind to troponin, allowing myosin to bind to actin and initiate contraction.

Front

What is the difference between fast-twitch and slow-twitch muscle fibers?

Back

Fast-twitch fibers are designed for quick bursts of power and fatigue quickly, while slow-twitch fibers are more endurance-oriented and resist fatigue.

Front

What is the sliding filament theory?

Back

The sliding filament theory explains how muscles contract by the sliding of actin and myosin filaments over each other.

Front

What is the role of lactic acid in muscle metabolism?

Back

Lactic acid is produced during anaerobic respiration and can lead to muscle fatigue.