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Muscle System Review 4
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Tendons are oftern continuous with thr endosteum of bone tissue.
True
False
False
There are more than 600 muscles in the body.
True
False
True
The circulatory system is responsible for muscle tone.
True
False
False
Muscle cells and muscle fibers are interchangeable terms.
True
False
True
Groups of muscle cells held together by the perimysium are called fascia
True
False
False
Fascia is another term for perimysium
True
False
False
Myofibrils contain several sarcomeres lined up end to end
True
False
True
Muscle cells have one nucleus and one mitochondrion
True
False
False
The cell membrane of a muscle fiber is called the sarcoplamic reticulum
True
False
False
At rest, troponin covers the active sites on the actin molecules
True
False
False
Myosin filaments interact with actin filaments during muscle contraction
True
False
True
When sarcomeres shorten, myofibrils also shorten
True
False
True
Compound that supplies the energy for muscle contraction
ATP
Protein that has receptor sites for an ion causes it to change shape and pull another protein away from the receptor sites on the actin
Troponin
Ion that is released by the sarcoplasmic reticulum
Calcium
Protein that directly prevents the formaton of cross bridges in the sarcomere
Tropomyosin
Protein that has cross bridge heads that pull on thin fiber
Myosin
By energizing these structures, chemical energy is converted to mechanical energy
Cross bridges
Protein that has active sites for cross bridge heads
Actin
Author
hey_itsdarra
ID
196068
Card Set
Muscle System Review 4
Description
4th 6t weeks
Updated
2013-01-28T22:28:39Z
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