Sliding Filament Word Scramble
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Question | Answer |
actin | thin protein filaments within a muscle |
action potential | the electric signal from the spine or the brain that activates a muscle |
concentric contraction | shortening of a muscle |
cross bridge | attach myosin filaments to active sites |
essentric contraction | lengthening phase of muscle contraction |
motor unit | collectively, a motor neuron and the muscle fibers which it activates |
muscle fiber | basic muscle cells |
myosin | thick protein filaments within a muscle |
neuromuscular junction | point at which a motor neuron attaches to a muscle |
sarcolemma | the membrane that encases an individual muscle fiber |
sarcomere | smallest contractile unit of a muscle |
sarcoplamic reticulum (SR) | runs parallel to and around each myofibril (actin and myosin winds) and contains a system of Tubules |
T-Tubules | run perpendicular to the SR and in between myosin fibers. They deliver the action potential to the muscle fibers |
troponon | a protein situated at regular intervals along an actin filament that binds to calcium during contraction |
A-Band | extends the length of the myosin filaments in a sarcomere |
I-Band | runs between myosin filaments in adjecent sarcomeres |
H-Zone | found in the center of the sarcomere and disappears during muscular contraction |
Z-Line | end borders of a sarcomere |
ATP (Adenosine triphosphate) | chemical molecule needed by all cels in the body |
Hypertrophy | the increase of the size of an organ or in a select area of the tissue |
Hyperplasia | an increase in the number of the cells of an organ or tissue causing it to increase in size. |
Created by:
ginabina3
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