Question

In this chapter, you should have studied the steps of a skeletal muscle contraction (sliding filament mechanism).

1. Briefly outline the steps below:

Answer 1

The following steps are involved in sliding filament theory:

1. Release of calcium ions from sarcoplasmic reticulum - depolarization.
2. Formation of cross bridge by myosin (head region) and actin filaments.
3. Binding of ATP on myosin heads → Breakdown of cross bridge → ATP hydrolysis
4. Muscle contraction through sarcomere shortening.

What is skeletal muscle?

Skeletal muscle consists of specialized tissues that have the property of contractibility. Skeletal muscles are composed of numerous muscle fibers tubular in appearance. Each muscle fiber contains rod like myofibrils.

Skeletal muscles are known as striated muscles because of the presence of alternating bands of light and dark (based on thickness) in their appearance under the microscope.

Thus, skeletal muscles are voluntary muscles.

Learn more about skeletal muscles, here:

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