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Muscle Contraction

Notes on Muscle Contraction for Anatomy & Physiology 2

QuestionAnswer
What two filaments work together to produce a muscle contraction? Actin and Myosin work together to produce a muscle contraction.
Actin and Myosin are attached to each other at a ___? Actin and Myosin are attached to each other at a Z-line.
The space between two Z-lines is called what? The space between two Z-lines is the sarcomere.
The actin and myosin interact to ___ the muscle fibers towards the ___, shortening the muscle fiber. The actin and myosin interact to pull the muscle fibers towards the M-line, shortening the muscle fiber.
___ impulses are sent to the muscles fibers to begin contraction. Nerve impulses are sent to the muscles fibers to begin contraction.
What filament has rounded extensions called heads? Myosin filaments have rounded extensions called heads.
Myosin heads attach to and pull what filament? Myosin heads attach to the twisted actin filaments and pull on them.
The Z-lines get closer together, and the ___ gets shorter. The Z-lines get closer together, and the sarcomere gets shorter.
The energy required for muscle contraction comes from what? The energy required for muscle contraction comes from ATP?
Created by: Levi.Willey
 

 



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