What are the differences between isotonic and isometric contraction Processes th

Question

What are the differences between isotonic and isometric contraction Processes that lead to muscle relaxation. You need to know all the parts of this image. What events occur during excitation coupling What are the steps involved in muscle contraction What are the differences between Type 1 (slow twitch) and Type 2 (fast twitch) fibers What makes up the thin myofilament of a myofiber What is a sarcomere What makes up the various zones of the image above What is motor unit and motor end plate What is the difference between actin and myosin Identify the sarcolemma. The events that occur when the muscle Is contracting. What are the contractile proteins of muscle contraction

Explanation / Answer

1. Isotonic concentric contractions cause shortening in muscle length. These type of muscle contractions are evident when an individual is weight lift above the head and holding it there before lowering.

In isometric contractions, the muscle length remains constant while the tension varies. Here, muscle tension develops in the muscle, but the muscle does not get shorten.

2. Nerve impulse is inhibited,

Calcium ions are actively transported back into the Sarcoplasmic Reticulum

The low calcium ion concentration causes the myosin cross bridge to break, and the myosin return to its relaxed position.

Sarcomeres return to their normal resting state (normal length).

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