The Active Sites to Which Cross-Bridges Attach are Found on The

Question

The active sites to which cross-bridges attach are found on the
A) sarcoplasmic reticulum.
B) actin myofilaments.
C) Z disks.
D) T tubules.
E) myosin myofilaments.

Accepted Answer

The active sites to which cross-bridges attach are found on the actin myofilaments. Cross-bridges are structures on the myosin myofilament that attach to the active sites on the actin myofilament during muscle contraction.