Question

what is the of the muscle spindle in controlling muscle contraction

Answer 1

Answer:

Structure of myofibrils and metabolites changes

Explanation: Exercise influeces every single skeletal muscle cell and their myofialments. Each skeletal muscle is made of thick and thin myofilaments which are arranged alternatively to each other.

Exercise provokes a change in their structure. With repeated and regular exercises the number of the myofilaments(=myofibrils) within a muscle fiber increases thus altering their structure. It is because of the change in the structure of the skeletal muscle; their metabolism also changes thus leading to an alternation in their physiology and the metabolite thus produced.

For example, with continuous exercises performed, the red and white skeletal muscle fibers of the arms do increase in their number and thus their reqirement for oxygen increases which in turn increase the recruitment of glycolytic enzymes and also stimulating their enhanced activity.