e. Drop out of the action with the recruitment of FT fibers fiber (flat portion
ID: 177171 • Letter: E
Question
e. Drop out of the action with the recruitment of FT fibers fiber (flat portion of the length-tensior 6. The physiological reason for the unchanged maximal force output of muscle diagram) sarcomere is allowed to shorten from 2.2 to 2.0 is: other in the middle of a. The tips of the thin filaments from the opposing sides of the sarcomere are touching each the sarcomere thus preventing further changes in the force development and changes in the b. The tips of the thick filaments hit the Z-lines preventing further shortening of the sarcomere force development the cross-bridge free areas of the thick filaments c. The tip sections of the thin filament are passing through Z-lines preventing further d. The tips of the thin filaments from the opposing sides of the sarcomere hit the shortening of the sarcomere and changes in the force development e. b and d only fibers except 7. All of the following are correct about FG muscle a. They have low mitochondrial density b. They are innervated by large motoneurons c. They have lower recruitment threshold d. They have low capillary density e. They have high activity of Myosin ATPaseExplanation / Answer
6.when sarcomere is allowed to shorten from 2.2 to 2.0um, in this section there is no change in force with increasing length as no additional cross-bridges can be formed.
so the answer is a.the tips of the thin filaments from the opposing sides of the sarcomere are touching each other in the middle of the sarcomere thus preventing further changes in the force development
7.fast glycolytic muscle fibers have the highest recruitment threshold
so the answer is C.they have lower recruitment threshold.
8.Ionic calcium is link between conversion of an excitation stimulus into contraction of the effector muscle fiber
so the answer is a.Ca++
9.the two prinicipal contractile proteins found in skeletal muscle are actin and troponin
so the answer is a.Actin and troponin
10.Fast-switch muscle fibers have well developed SR network than slow oxidative fibers.
so the answer is e.they have a well developed SR network
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