4. A transverse section across theT + a) I-band to one side of the Z-line would bisect only actin myofilaments.T + b) -A-band to one side of the H-zone would bisect both actin and myosin myofilaments....

please asnwer 4,5

 no explanation needed just the answer

Extracted text: 4. A transverse section across theT + a) I-band to one side of the Z-line would bisect only actin myofilaments.T + b) -A-band to one side of the H-zone would bisect both actin and myosin myofilaments. T + ) H zone to either side of the M-line would bisect only thick filaments T i) All of the above (a, b, c and d) are correct. T 5. Control of cross-bridge formation between actin and myosin myofilaments in skeletal muscle T + a) requires tropomyosin to block active sites on the actin filaments so that myosin heads cannot bind In a relaxed muscle. T + b) requires high levels of ATP inside the muscle cell prevent muscle contraction. T + c) results from removal of free calcium ions from the muscle cell cytoplasm to start muscle contraction. T + d) All of the above (a, b, c and d) are correct. T