Sliding filament theory can be best explained | vedclass

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

Question

(A) : During muscle contraction,the laterally projecting heads (cross bridges) of the thick myosin myofilaments come in contact with the thin actin my

Vedclass · Accepted Answer

actin and myosin filaments do not shorten but rather slide pass each other

Vedclass · Answer

(A) : During muscle contraction,the laterally projecting heads (cross bridges) of the thick myosin myofilaments come in contact with the thin actin myofilaments and rotate on them.This pulls the thin myofilaments toward the middle of the sarcomere,past the thick myofilaments.The $Z$ lines come closer together and the sarcomere becomes shorter.Length of the $A$ band remains constant.Myofilaments (both actin and myosin) stay the same length.Free ends of actin myofilaments move closer to the centre of the sarcomere,bringing $Z$ lines closer together.$I$ bands shorten and $H$ zone narrows.$A$ similar action in all the sarcomeres results in shortening of the entire myofibril and thereby of the whole fibre and the whole muscle.

Sliding filament theory can be best explained as

Similar Questions

The anaerobic contraction of skeletal muscle causes deposition or accumulation of

Which of the following movements in the mammalian skeleton represents the leverage of the third order,where the force is applied at a point between the fulcrum and the point of resistance?

The $ATPase$ enzyme required for muscle contraction is located on ..........

Which of the following is the contractile protein of a muscle?

The protein which maintains the muscular storage of oxygen is

Vedclass Test Series

Exam Paper Generator

Online Exam Module