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Skeletal muscle: Quiz

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Question 1: It is one of three major muscle types, the others being cardiac and ________.
Intrafusal muscle fiberSmooth muscleExtrafusal muscle fiberSkeletal muscle

Question 2: In addition to the ________ and myosin components that constitute the sarcomere, skeletal muscle fibers also contain two other important regulatory proteins, troponin and tropomyosin, that are necessary for muscle contraction to occur.
ActinSyneminDystrophinDystroglycan

Question 3: Once a cell is sufficiently stimulated, the cell's sarcoplasmic reticulum releases ionic ________ (Ca2+), which then interacts with the regulatory protein troponin.
AluminiumCalciumMagnesiumIron

Question 4: These fibers are suited for endurance and are slow to fatigue because they use ________ to generate ATP.
ProteinGluconeogenesisCellular respirationGlycolysis

Question 5: ________ is used to determine force and contraction speed at different stimulation frequencies, which are related to fiber-type composition and mix within an individual muscle group.
Action potentialLocked-in syndromeMuscle contractionElectrical muscle stimulation

Question 6: Type I fibers appear red due to the presence of the oxygen binding protein ________.
CytoglobinMyoglobinHemoglobinHBB

Question 7: Skeletal muscle cells are excitable and are subject to depolarization by the neurotransmitter ________, released at the neuromuscular junction by motor neurons[2].
Kynurenic acidKetamineDextromethorphanAcetylcholine

Question 8: As its name suggests, most skeletal muscle is attached to bones by bundles of ________ fibers known as tendons.
Lysyl hydroxylaseKeratinCollagen, type I, alpha 1Collagen

Question 9: There are two principal ways to categorize muscle fibers: the type of myosin (fast or slow) present, and the degree of ________ that the fiber undergoes.
MetabolismAdenosine triphosphateOxidative phosphorylationElectron transport chain

Question 10: While the muscle fiber does not have a smooth endoplasmic reticulum it contains a ________.
Endomembrane systemEndoplasmic reticulumGolgi apparatusCell (biology)







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