Electron microscopic studies of the sarcomere | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) According to the sliding filament theory,during muscle contraction,the thin filaments slide over the thick filaments.$1$. The $A$-band (containing

Vedclass · Accepted Answer

The width of the $H$-zone becomes smaller

Vedclass · Answer

(B) According to the sliding filament theory,during muscle contraction,the thin filaments slide over the thick filaments.$1$. The $A$-band (containing myosin) maintains its length because the thick filaments do not change size.$2$. The $I$-band (containing actin) shortens as the filaments overlap more.$3$. The $H$-zone (the central part of the $A$-band where only myosin is present) narrows or disappears as actin filaments move into it.$4$. Therefore,both statements $A$ and $B$ are technically correct observations of muscle contraction. However,in most standard competitive biology contexts,the reduction of the $H$-zone is a primary characteristic feature of the sliding mechanism.

Electron microscopic studies of the sarcomeres have revealed that during muscle contraction:

Similar Questions

At which site do muscle fibers receive stimulation from a motor neuron?

The Krause membrane or $Z$-line is a structure in a myofibril that separates two adjacent:

In a muscle fiber,$Ca^{++}$ is stored in the .....

In the mechanism of muscle contraction or shortening of muscle,the . . . . . . get reduced whereas the . . . . . . retain the length.

Contraction of muscle fibre takes place by the sliding of $:-$

Vedclass Test Series

Exam Paper Generator

Online Exam Module