Introduction|Sarcomere|Mechanism Of Muscle Contraction|Stages In Cross Bridge Formation, Rotation Of Head And Breaking Of Cross Bridge|OMR

Introduction |Sarcomere|Mechanism Of Muscle Contraction|Stages In Cross Bridge Formation, Rotation of Head And Breaking Of Cross Bridge|Types Of Skeletal Muscle Fibres|OMR

Arrange the following events of muscle contraction in the sequence : (i) Generate an action potential in the sarcolemma (ii) Form a cross bridge (iii) Release a neurotransmitter (Acetylcholine) (iv) Release of calcium ions in sarcoplasm (v) Pulls the attached actin filaments towards the centre of "A" band (vi) Remove the masking of active sites for myosin The correct option is :-

Read the following statements regarding muscle contraction (i) One ATP utillised for making and breaking of the cross bridge. (ii) The sarcomere lies between 2 Z-lines (iii) Troponin blocks the active sites in resting stage (iv) Ca^(++) ions help in unmasking active sites on HMM Choose the correct option

lons that must be present for binding the cross bridges are

The ion that must be present in adequate amount for the binding of cross bridges with actin is

Cross bridges of sarcomere in skeletal muscle are made up of

Which of the following stage of cross-bridge is shown in the diagram?

The steps involved in the mechanism of muscle contraction are given below. Arrange the steps in proper sequential order and select the correct option. I. Release of calcium ions in the sarcoplasm. II. Signal sent by the CNS via a motor neuron. III. Binding of calcium with a subunit of troponin on actin filaments. IV. Generation of the action potential in the sarcolemma. V. Binding of myosin head to the exposed active sites on actin to form a cross-bridge. VI. Inward pulling of ‘Z’ line attached to actin causing shortening of the sarcomere. VII. Pulling of the attached actin filaments towards the centre of 'A' band. VIII. Release of neurotransmitter acetylcholine and generation of the action potential in the sarcolemma.