The plateau at the top of the length -tension curve is due to
A) The “bare zone” in the middle of the thick filament that lacks myosin heads
B) Interference of thin filaments from adjacent half-sarcomeres
C) Interference of the thick filaments with the Z line proteins
D) The series-elastic elements limiting force transfer
E) Heterogeneity of sarcomere lengths along the muscle fiber

Question

Quizplus · Accepted Answer

The plateau of the length-tension curve is due to the "bare zone" in the middle of the thick filament that lacks myosin heads, which limits the number of cross-bridges that can form, thus limiting tension.

The Plateau at the Top of the Length -Tension Curve