Q. For how long, contraction of the muscles continues in sliding filament theory?
A) Till ATP binds to myosin head
B) Till ADP binds to myosin head
C) Till $Ca^{2 +}$ present in sarcoplasm
D) Till polymerization of myosin head is going on
Explanation
Sliding of actin and myosin filaments constitutes till the $Ca^{2 +}$ ions are pumped back to the sarcoplasmic cisternae, resulting in masking the actin filaments. This causes the return of Z lines back to their original position, i.e., relaxation
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.