Save Question 3 (1 point) Select ANY STATEMENTS that could be used to describe s

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Save Question 3 (1 point) Select ANY STATEMENTS that could be used to describe skeletal muscle physiology Calmodulin is the site of calcium rejalation in the contraction The trigger for contraction is a rise in intracellular calkcium ATP energizes the sliding process Tropomyosin is the site of calcium regulation in the contraction Actin and myosin interact by the sliding filament theory Save Question 4 (1 point) Which of the following scenarios would increase the force of muscte contraction SELECT ANY ACCURATE STATEMENTS 3

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The selected statements are:

ATP energizes the sliding process.
Tropomyosin is the site of calcium regulation in the contraction.
Actin and myosin interact by the sliding filament theory.

Intracellular calcium concentration rises, calcium binds to RyRs, which enhances the increase in calcium concentration.

According to the sliding filament theory, the myosin heads become energized by using the energy in the form of ATP.

Ca++ attaches to a protein known as tropomyosin, which covers the attachment site on the actin myofilaments. This causes the tropomyosin to uncover the attachment site which allows the myosin head to bind to the attachment site and start the cycle. As long as the Ca++ concentration remains high cycling or contraction, continues.

According to the sliding filament theory, the myosin filaments of muscle fibers slide past the actin filaments during muscle contraction.

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