Unit 7 Vocabulary
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Muscle Fiber | Also known as myocytes. The type of cell found in muscle tissue. Myocytes are long, tubular cells that develop from myoblasts to form muscles.
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| Endomysium | Loose connective tissue surrounding the individual muscular fibers within the smallest bundles.
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| Neuromuscular Junction | A synapse between a motor neuron and skeletal muscle.
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| Perimysium | Loose connective tissue that surrounds fasciculi (bundles).
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| Fascicle | A small bundle of muscle fibers.
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| Sarcomere | Basic functional unit of skeletal muscle, because it is the smallest part that can contract.
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| Epimysium | Connective tissue that surrounds the skeletal muscle.
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| Aponeurosis | Sheaths of tendons.
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| Sarcolemma | Muscle cell membrane; T tubules wrap around sarcomeres where myosin and actin overlap and connect to sarcolemma to sarcoplasmic reticulum.
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| Myofibrils | Any of the elongated contractile threads found in striated muscle cells.
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| Actin | Thin myofilaments that contain troponin molecules which provide a binding site for calcium.
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| Myosin | Thick microfiliments that binds to exposed attachment sites on actin.
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| Acetylcholine | A compound that occurs throughout the nervous system, in which it functions as a neurotransmitter.
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| Origin of the Muscle | Head; Most stable/stationary.
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| Insertion of the Muscle | End; attached to bone moving the most.
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| Belly of the Muscle | Muscle between origin and insertion.
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| Prime Mover | The main muscle producing movement.
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| Synergists | Muscles that work together to produce movement
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| Antagonists | Muscle whose actions counteract with another muscle.
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| Isometric | Type of movement where length of muscle does not change, even though the amount of tension produced increases during contraction.
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| Isotonic (Muscle Contraction) | Type of movement where the amount of tension is constant, while the length of the muscle decreases.
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| Action Potential | Depolarization and re-polarization of cell membrane resulting in contraction.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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