Repetitive stimulation of a skeletal muscle fiber will cause an increase in contractile strength because repetitive stimulation causes an increase in Select one: O a. The velocity of muscle contraction O b. The number of muscle myofibrils generating tension O c. Concentration of calcium in the myoplasm O d. The duration of cross-bridge cycling Next page

Q: Muscle contraction can occur when: is it 1,2,3,4? A bands lengthen. myosin filaments shorten.…

A: Muscle is a specialized contractile tissue that is a distinguishing characteristic of animals.…

Q: During the cross-bridge cycle of muscle contraction, what is the role of troponin? it changes shape…

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Q: muscle cells are made up of? A. Z bars b. actin c. myosin d. myofibrils

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Q: Which item is biggest? A. myosin head B. myofibril C. troponin D. sarcomere

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Q: Arrange the steps of muscle contraction in the correct order Myosin head forms cross bridge with…

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A: Introduction Muscle contraction:- It is the activation of tension-generating sites within muscle…

Q: Which of the following is responsible for muscle movement? A. Antagonists B. Isometric Contraction…

A: Q.1  Answer :-  Antagonist and agonist muscles often occur in pairs, called antagonistic pairs.…

Q: For relaxation to occur, A. calcium leaves the sarcoplasmic reticulum, and troponin binds calcium…

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Q: The function of ATP during muscle contraction is toa. cause an allosteric change in myosin so it…

A: ATP(adenosine triphosphate) causes an allosteric change on myosin so it detaches from actin and…

Q: A skeletal muscle motor unit   A.Is the number of muscle cells innervated by one motor neuron. B.Is…

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A: According to the question, the decrease in active force that occurs at lengths longer than the…

Q: Briefly describe why contraction of the muscle cell is called “sliding filament theory” (what is…

A: During skeletal muscle contraction, a motor neuron stimulates the skeletal muscle fibers. The…

Q: Based on your understanding of skeletal muscle fiber physiology, which of the following processes is…

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Q: According to the sliding filament theory: a. The tension increases linearly as actin-myosin overlap…

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Q: Repetitive stimulation of a skeletal muscle fiber will cause an increase in contractile strength…

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Q: Which of the following is NOT TRUE of the neuromuscular junction? O presynaptic calcium influx…

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A: During muscle contraction calcium is released from the sarcoplasmic reticulam which binds with the…

Q: The transverse tubular system: A)speeds the transmission of an action potential down the length of a…

A: *Tansverse tubular system is a network of interconnecting rings that surrounds a myofibril. *It…

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Q: The muscle cell membrane of the neuromuscular junction is called the A. Synaptic cleft B. Motor end…

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Q: In an isometric contraction, the muscle develops tension but does not: a.  Expend energy. b.…

A:

Q: All the following are important for smooth muscle contraction EXCEPT? Select one: a. Actin b. Myosin…

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Q: What defines a Sarcomere: a. Width of the I zones b. A band plus the H zone Distance between the Z…

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Q: In the presence of myosin cross-bridges are able to bind to complementary sites on the actin…

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Q: Explain the concept of the following in regard to muscle cells: sliding filament movement does not…

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Muscle Action

A change in the body or a bodily organ as a result of its functioning is referred to as an action. Muscle action can be defined as the specific movement of a bodily part generated by the contraction of a muscle. The muscle proteins actin and myosin are the important contractile proteins involved in muscle action. Muscle contraction, in addition to movement, serves several other important functions in the body, including posture, heat generation, and joint stability. Muscle contraction maintains posture, which includes standing and sitting.