Skeletal Muscle Contraction Physiology

Front

What is muscle fatigue?

Back

Muscle fatigue is a condition where muscles are unable to maintain their expected level of performance due to various factors, including energy depletion and ionic disturbances.

Front

What causes muscle fatigue related to energy?

Back

Muscle has used most of its available energy.

Front

What is extensibility in muscle tissue?

Back

Extensibility is the ability of muscle tissue to stretch without being damaged.

Front

What is the neurotransmitter used at the Neuromuscular Junction?

Back

Acetylcholine.

Front

What are the names of the thin and thick filaments in muscle contraction?

Back

Thin filaments are Actin, and thick filaments are Myosin.

Front

What structure in skeletal muscle cells functions in calcium storage?

Back

Sarcoplasmic reticulum.

Front

What is the role of T-tubules in muscle contraction?

Back

T-tubules transmit action potentials into the muscle fiber, facilitating the release of calcium from the sarcoplasmic reticulum.

Front

What is the function of tropomyosin in muscle contraction?

Back

Tropomyosin blocks the binding sites on actin filaments, preventing muscle contraction until calcium ions bind to troponin.

Front

What is the role of troponin in muscle contraction?

Back

Troponin binds to calcium ions, causing a conformational change that moves tropomyosin away from actin's binding sites, allowing contraction.

Front

What is contractility in muscle tissue?

Back

Contractility is the ability of muscle tissue to shorten and generate force.