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A2 Joints and Muscle

QuestionAnswer
Straightening a limb EXTENSION
Bending a limb FLEXION
Holds muscle to bone TENDON
Holds bone to bone LIGAMENT
The fluid that lubricates moveable joints SYNOVIAL
Cells such as muscles that have several nuclei MULTINUCLEATE
A pair of muscles that work to move a bone to and fo ANTAGONISTIC
A contractile unit of a muscle SARCOMERE
The thin fibres attached to the end of the sarcomere ACTIN
The bundle of thick proteins with 'nodding heads' MYOSIN
The two proteins associated with actin TROPONIN AND TROPOMYOSIN
The theory of how a muscle contracts SLIDING FILAMENT THEORY
An ion that is needed for muscle contraction CALCIUM
Where a nerve impuls enters the muscle fibre NEUROMUSCULAR JUNCTION
The system of tubules in the muscle where the calcium ions are stored SARCOPLASMIC RETICULUM
The long strands of protein that cover the myosin binding sites TROPOMYOSIN
The protein molecule that the calcium ions attach to, in order to expose the myosin binding site TROPONIN
The substances released as the myosin binds to the actin ADP and Pi
The substance needed to release the myosin head after nodding ATP
The process that returns calcium ions to the sarcoplasmic reticulum after contraction ACTIVE UPTAKE
Created by: carolannaston
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