Which of the following is false regarding smooth muscle? A. It contracts slower than skeletal muscle. B. It is multinucleated. C. It maintains contraction longer while using less energy than skeletal muscle. D. It is smaller than skeletal muscle. E. All the above are true.

Which of the following is false regarding smooth muscle? A. It contracts slower than skeletal muscle. B. It is multinucleated. C. It maintains contraction longer while using less energy than skeletal muscle. D. It is smaller than skeletal muscle. E. All the above are true.

Comprehensive Medical Assisting: Administrative and Clinical Competencies (MindTap Course List)

6th Edition

ISBN:9781305964792

Author:Wilburta Q. Lindh, Carol D. Tamparo, Barbara M. Dahl, Julie Morris, Cindy Correa

Publisher:Wilburta Q. Lindh, Carol D. Tamparo, Barbara M. Dahl, Julie Morris, Cindy Correa

Chapter32: Rehabilitation And Therapeutic Modalities

Section: Chapter Questions

Problem 7CR

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Concept explainers

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.

Question

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Which of the following is false regarding smooth muscle?
A. It contracts slower than skeletal muscle.
B. It is multinucleated.
C. It maintains contraction longer while using less energy than skeletal
muscle.
D. It is smaller than skeletal muscle.
E. All the above are true.
Select one:
O A
B
OD
O E

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Which of the following statements about the connective sheath of skeletal muscle is false? a. the endomysium wraps around every single muscle fiber b. the perimysium wraps around groups of muscle fibers c. the epimysium wraps around the whole muscle organ d. all of the above e. none of the above
Which of the following describes a similarity between cardiac and smooth muscle cells?a. An action potential always precedes contraction.b. The majority of the Ca21 that activates contraction comes from theextracellular fluid.c. Action potentials are generated by slow waves.d. An extensive system of T-tubules is present.e. Ca21 release and contraction strengths are graded
Which of the following statements relating to smooth muscle is true? a. single-unit smooth muscles contract rhythmically due to gap junctions b. multi-unit smooth muscles are arranged like skeletal muscle motor units c. visceral smooth muscles exhibit spontaneous action potentials d. multi-unit smooth muscles exhibit graded contractions in response to neural stimuli e. all of the above
All of the following characteristics apply to skeletal muscle except a. They are striated. b. They are multinucleated. c. They are voluntary. d. They contain intercalated discs. e. They are attached to the skeleton by means of tendons.
Which of the following statements about the microscopic structure of smooth muscle fibers is incorrect? a. smooth muscle cells lack myofibrils, sarcomere, and t-tubules b. smooth muscle cells contain endomysium only c. smooth muscles cells contain caveolae that sequesters calcium ions d. all of the above e. none of the above
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Which of the following statements best describes the sliding filament mechanism of muscle contraction? a. Actin and myosin filaments do not shorten, but rather, slide past each other. b. Actin and myosin filaments shorten and slide past each other. c. As they slide past each other, actin filaments shorten, but myosin filaments do not shorten. d. As they slide past each other, myosin filaments shorten, but actin filaments do not shorten.
Which of the following is true? A. Muscle fibers either will contract with all the force possible under existing conditions or will not contract at all. B. Skeletal muscles can contract with varying degrees of strength given different circumstances. C. Muscle length does not have an effect on contractile strength. D. Metabolic condition of the myocyte does not have an effect on contractile strength.
Compared with skeletal muscle, visceral smooth muscle a. has the same ability to be stretched. b. loses the ability to contract forcefully when stretched. C. maintains about the same tension, even when stretched. d. cannot maintain long, steady contractions. e. can accumulate a substantial oxygen deficit
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When a muscle is fully stretched, which of the following statements is true (check all that apply). Select one or more: a. No tension can be generated. b. Both contractile and elastic forces generate tension. c. The actin and myosin filaments cannot interact. d. No developed or contractile tension can be generated. e. Passive or elastic forces generate tension.
Compared with skeletal muscle, visceral smooth musclea. has the same ability to be stretched.b. loses the ability to contract forcefully when stretched.c. maintains about the same tension, even when stretched.d. cannot maintain long, steady contractions.e. can accumulate a substantial oxygen deficit.