Muscle Contraction Flashcard

Front

What is the thick band in muscle fibers that has heads and is responsible for muscle contraction?

Back

Myosin

Front

What specific type of muscle tissue is responsible for voluntary movements and is attached to bones?

Back

Skeletal Muscle

Front

Which proteins make up the thin band in muscle fibers?

Back

Actin, Troponin, Tropomyosin

Front

What is the role of tropomyosin in muscle contraction?

Back

It blocks the binding sites on actin, preventing muscle contraction when calcium is not present.

Front

What enzyme breaks down acetylcholine to prevent continuous muscle contraction?

Back

Acetylcholinesterase

Front

What is the primary energy molecule required for muscle contraction?

Back

ATP (Adenosine Triphosphate)

Front

What ion is crucial for initiating muscle contraction by binding to troponin?

Back

Calcium (Ca2+)

Front

What is the function of troponin in muscle contraction?

Back

Troponin binds to calcium ions and causes tropomyosin to move, exposing binding sites on actin.

Front

What is the sliding filament theory?

Back

It explains how muscle fibers contract by the sliding of actin and myosin filaments over each other.

Front

What is the role of acetylcholine in muscle contraction?

Back

It is a neurotransmitter that transmits the signal from nerve to muscle, initiating contraction.