During muscle contraction:
during muscle contraction: (Choose the correct answer below).
the M-line slides toward Z-disks
actin pulls on myosin
troponin forms a cross-bridge with actin
Z-disks slide toward the M-line
during muscle contraction: (Choose the correct answer below).
the M-line slides toward Z-disks
actin pulls on myosin
troponin forms a cross-bridge with actin
Z-disks slide toward the M-line