MuScLeS!

Front

What is the transverse abdominis?

Back

The transverse abdominis is a deep abdominal muscle that plays a crucial role in stabilizing the core and maintaining internal abdominal pressure.

Front

What causes skeletal muscle fatigue?

Back

Skeletal muscle fatigue occurs due to insufficient intracellular quantities of ATP caused by excessive consumption during prolonged activity.

Front

What happens when an action potential reaches the axon terminal?

Back

When an action potential reaches the axon terminal, it triggers the release of acetylcholine (ACh) into the synaptic cleft.

Front

What is the function of the perimysium?

Back

The perimysium is a connective tissue that surrounds each fascicle (bundle of muscle fibers) within a muscle.

Front

What is adduction in terms of limb movement?

Back

Adduction is the movement of a limb toward the body's midline.

Front

What is the role of acetylcholine (ACh) in muscle contraction?

Back

Acetylcholine (ACh) is a neurotransmitter that crosses the synaptic cleft and binds to receptors on the muscle fiber, initiating muscle contraction.

Front

What is the difference between skeletal muscle and smooth muscle?

Back

Skeletal muscle is striated and under voluntary control, while smooth muscle is non-striated and involuntary.

Front

What is the function of mitochondria in muscle cells?

Back

Mitochondria produce ATP through aerobic respiration, providing energy for muscle contractions.

Front

What is the role of sodium ions in muscle contraction?

Back

Sodium ions rush into the muscle fiber during depolarization, initiating the action potential that leads to muscle contraction.

Front

What is the sarcomere?

Back

The sarcomere is the basic contractile unit of a muscle fiber, composed of actin and myosin filaments.