Nutrition: Concepts and Controversies
13th Edition
ISBN: 9781133603184
Author: Frances Sizer, Ellie Whitney
Publisher: Cengage Learning
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Chapter 10, Problem 4SC
To overload a muscle is never productive.
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Muscle fatigue occurs because of..
A relative deficit of ATP
Excessive accumulation of lactic acid
Ionic imbalances
Depletion of nutient stores
All of the above
Describe some cause(s) of muscle fatigue and define this term clearly.
Treppe increases skeletal muscle contraction strength by:
O Adding more motor units to the contraction
O Increasing the diameter of the muscle cells
It does not increase contraction strength
O Allowing excess calcium ion release from the sarcoplasmic reticulum
O Adding more muscle fibers to the contraction
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Nutrition: Concepts and Controversies
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- Nerve impulses first stimulate a skeletal muscle fiber at _______. a. T tubules b. sarcomeres c. neuromuscular junctions d. actin binding sitesarrow_forwardWrite a note on muscle tensionarrow_forwardIn an isotonic concentric contraction, O muscle length shortens muscle tension exceeds the force of the load O the load is moved. O all of the abovearrow_forward
- The A bands of a muscle shorten during contraction True False All of the following prefixes refer to muscle except: mys- sarco- myo- muro-arrow_forwardMuscle contraction can occur when: is it 1,2,3,4? A bands lengthen. myosin filaments shorten. sarcomeres shorten. I bands remain unchangedarrow_forwardMuscles need energy to function properly. Identify a minimum of two pathways generating ATP during muscle activitarrow_forward
- When discussing the hierarchy of skeletal muscle organization, the is the Highest level of organization and the the Smallest level of organization. O Fascicle : Muscle cell (AKA Myocyte, AKA myofiber) O Muscle belly: Muscle cell (AKA Myocyte, AKA myofiber) O Myofbril : Sarcomere O Sarcomere: Muscle belly O Muscle belly Sarcomere « Previous Next »arrow_forwardAs sarcomere shortening progresses during muscle contraction, which structure gets progressively shorter? H zone None of the listed choices get shorter M line A bandarrow_forwardactive muscle tension begins at approximately one hundred percent of resting length for a muscle true or falsearrow_forward
- Based on your understanding of skeletal muscle fiber physiology, which of the following processes is NOT dependent on the use of ATP? O recovery stroke O Na+/K+ pumps O voltage-gated Ca2+ channels O muscle fiber relaxation none of the above Next « Previousarrow_forwardHas wave summation. treppe twitch incomplete tetanus complete tetanus Has increased muscle length with no change in tension. eccentric concentric isometric The amount of ATP needed for muscle contractionis high low. The amount of ATP stored in muscle tissue is high low.arrow_forwardDuring muscle contraction, the cross-bridge detaches when ___arrow_forward
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