Muscular System Quiz

What are the functions of the muscular system?

• A. Movement of the body

• B. Maintaining posture

• C. Generating body heat

• D. All of the above

Which type of muscle is voluntary?

• A. Skeletal

• B. Smooth

• C. Cardiac

• D. None of the above

What is the outermost layer that surrounds the entire muscle?

• A. Epimysium

• B. Perimysium

• C. Endomysium

• D. Myofibrils

What is the contractile unit of a muscle fiber?

• A. Sarcolemma

• B. Sarcoplasm

• C. Sarcomere

• D. T tubule

Which protein maintains the structure of muscle fibers?

• A. Sarcolemma

• B. Sarcoplasmic Reticulum

• C. Dystrophin

• D. Myofibrils

What is the treatment option for Duchenne muscular dystrophy (DMD) that repairs the gene that makes dystrophin?

• A. Corticosteroids

• B. Physical therapy

• C. Surgery

• D. Gene Therapy - EXONDYS51

What is the neurotransmitter that crosses the gap between the neuron and motor end plate?

• A. Acetylcholine

• B. Cholinesterase

• C. Serotonin

• D. Dopamine

What is the theory of how muscle contracts called?

• A. Sliding Filament Theory

• B. Sarcomere Theory

• C. Myofibril Theory

• D. Actin-Myosin Theory

Where does ATP production occur in the muscle cells?

• A. Sarcolemma

• B. Sarcoplasm

• C. Mitochondria

• D. Myofibrils

What causes muscle fatigue?

• A. Accumulation of lactic acid

• B. Lack of oxygen

• C. Depletion of ATP

• D. All of the above