Muscular System Test - ACP

Front

How much ATP is used in each myosin/actin cross-bridge cycle?

Back

1 ATP is used in each myosin/actin cross-bridge cycle.

Front

What neurotransmitter is released across the synaptic cleft when Calcium ions enter the neuromuscular junction?

Back

Acetylcholine is released across the synaptic cleft.

Front

What deteriorates as adults age, causing bones to make grinding noises?

Back

Articular cartilage deteriorates, causing grinding noises in bones.

Front

What attaches muscle to bone?

Back

Tendons attach muscle to bone.

Front

Which type of synovial joint has the greatest range of motion?

Back

The ball and socket joint has the greatest range of motion.

Front

What is the role of Calcium ions in muscle contraction?

Back

Calcium ions bind to troponin, causing a conformational change that allows myosin to bind to actin.

Front

What is the function of the sarcomere in muscle fibers?

Back

The sarcomere is the basic contractile unit of muscle fibers, responsible for muscle contraction.

Front

What is the difference between ligaments and tendons?

Back

Ligaments connect bone to bone, while tendons connect muscle to bone.

Front

What is the sliding filament theory?

Back

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

Front

What is the role of acetylcholine in muscle contraction?

Back

Acetylcholine transmits the nerve impulse to the muscle, triggering contraction.