What is the primary focus of the sliding filament theory?

• The interaction between actin and myosin filaments

• The process of muscle relaxation

• The role of calcium in muscle contraction

• The function of connective tissue

Which of the following is a potential factor in delayed onset muscle soreness (DOMS)?

• An influx of enzymes into the fatigued area.

• Muscle fiber recruitment

• Connective tissue damage

• Increased blood flow

What is one of the roles of muscles in integrated body movements?

• To produce isolated muscle actions

• To stabilise joints

• To increase bone density

• To store energy

What is a function of connective tissue in the body?

• To transmit nerve impulses

• To support and bind other tissues

• To produce red blood cells

• To regulate body temperature

What is the function of the sarcoplasmic reticulum in muscle fibers?

• Stores calcium ions

• Produces energy

• Transports oxygen

• Synthesizes proteins

Which structure surrounds the muscle fiber?

• Endomysium

• Epimysium

• Perimysium

• Myofibril

What are the two main proteins involved in muscle contraction?

• Actin and Myosin

• Collagen and Elastin

• Keratin and Myoglobin

• Hemoglobin and Fibrin

Which layer surrounds the entire muscle?

• Epimysium

• Endomysium

• Perimysium

• Sarcoplasmic reticulum

What role do mitochondria play in muscle function?

• Energy is released using oxygen (aerobic ATP production occurs here).

• They store calcium ions.

• They produce lactic acid.

• They synthesize proteins.

Which of the myofilaments are thick?

• Myosin

• Actin

• Tropomyosin

• Troponin