Anatomy Ch 7 Muscle Flashcard

Front

What are fascicles in muscle anatomy?

Back

Fascicles are bundles of muscle fibers surrounded by perimysium.

Front

What occurs when energy reserves in a muscle are exhausted?

Back

Fatigue occurs.

Front

What is the epimysium?

Back

The epimysium is the dense layer of collagen fibers that surrounds an entire skeletal muscle.

Front

What is oxygen debt?

Back

Oxygen debt refers to the amount of oxygen used in the recovery period to restore normal pre-exertion conditions.

Front

What happens to the H zone of the sarcomere during muscle contraction?

Back

The H zone disappears.

Front

What surrounds individual muscle fibers?

Back

Endomysium surrounds individual muscle fibers.

Front

What is the role of myofibrils in muscle fibers?

Back

Myofibrils are the contractile elements within muscle fibers that facilitate contraction.

Front

What is the function of tendons in muscle anatomy?

Back

Tendons connect muscles to bones, allowing for movement.

Front

What is the difference between isotonic and isometric contractions?

Back

Isotonic contractions involve muscle shortening with movement, while isometric contractions involve muscle tension without movement.

Front

What is lactic acid and how does it relate to muscle fatigue?

Back

Lactic acid is a byproduct of anaerobic metabolism that accumulates during intense exercise, contributing to muscle fatigue.