The Sliding Filament Theory

 

 

 

 

 

The process of muscle contraction is incredibly complex and includes many steps, substances, and impulses.

In your initial post:

For your initial discussion post, choose one component of the sliding filament theory and explain why it is essential to the process of muscle contraction. Describe where the component is found within the sarcomere and the function it serves. Use your own words to create your discussion post and choose your topic from this list:

Actin
Myosin
Troponin
T-tubules
Sarcoplasmic reticulum
Acetylcholine
Action potential
Example: Calcium

Calcium is stored in the sarcoplasmic reticulum. Stored calcium ions are released from the sarcoplasmic reticulum and bind to troponin. This reveals the binding site for myosin heads to attach.

 

Sample Solution

The most widely accepted theory explaining how muscle fibers contract is called the sliding filament theory. According to this theory, myosin filaments use energy from ATP to “walk” along the actin filaments with their cross bridges. This pulls the actin filaments closer together. The movement of the actin filaments also pulls the Z lines closer together, thus shortening the sarcomere. Muscle contraction results from an interaction between the actin and myosin filaments that generates their movement relative to one another. The molecular basis for this interaction is the binding of myosin to actin filaments, allowing myosin to function as a motor that drives filament sliding.

The second section begins deciphering jus in bello or what actions can we classify as permissible in just wars (Begby et al (2006b), Page 323).
First, it is never just to intentionally kill innocent people in wars, supported by Vittola’s first proposition. This is widely accepted as ‘all people have a right not to be killed’ and if a soldier does, they have violated that right and lost their right. This is further supported by “non-combatant immunity” (Frowe (2011), Page 151), which leads to the question of combatant qualification mentioned later in the essay. This is corroborated by the bombing of Nagasaki and Hiroshima, ending the Second World War, where millions were intently killed, just to secure the aim of war. However, sometimes civilians are accidentally killed through wars to achieve their goal of peace and security. This is supported by Vittola, who implies proportionality again to justify action: ‘care must be taken where evil doesn’t outweigh the possible benefits (Begby et al (2006b), Page 325).’ This is further supported by Frowe who explains it is lawful to unintentionally kill, whenever the combatant has full knowledge of his actions and seeks to complete his aim, but it would come at a cost. However, this does not hide the fact the unintended still killed innocent people, showing immorality in

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