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BSC 2085: Muscular System Exam Questions and Answers 100% Pass
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BSC 2085: Muscular System Exam Questions and Answers 100% Pass Muscle that has a striped appearance is described as being ________. a) elastic b) nonstriated c) excitable d) striated - d) striated Which element is important in directly triggering contractions? a) sodium (Na+) b) calcium (C...

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  • November 30, 2024
  • 17
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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BSC 2085: Muscular System Exam Questions and
Answers 100% Pass

Muscle that has a striped appearance is described as being ________.


a) elastic


b) nonstriated


c) excitable


d) striated - ✔✔d) striated


Which element is important in directly triggering contractions?


a) sodium (Na+)


b) calcium (Ca++)


c) potassium (K+)


d) chloride (Cl-) - ✔✔b) calcium (Ca++)


Which of the following properties is not common to all three muscle tissues?


a) excitability


b) the need for ATP


c) at rest, uses shielding proteins to cover actin-binding sites


d) elasticity - ✔✔c) at rest, uses shielding proteins to cover actin-binding sites


The correct order for the smallest to the largest unit of organization in muscle tissue is ________.




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,a) fascicle, filament, muscle fiber, myofibril


b) filament, myofibril, muscle fiber, fascicle


c) muscle fiber, fscicle, filament, myofibril


d) myofibril, muscle fiber, filament, fascicle - ✔✔b) filament, myofibril, muscle fiber, fascicle


Depolarization of the sarcolemma means ________.


a) the inside of the membrane has become less


negative as sodium ions accumulate


b) the outside of the membrane has become less


negative as sodium ions accumulate


c) the inside of the membrane has become more


negative as sodium ions accumulate


d) the sarcolemma has completely lost any electrical


charge - ✔✔a) the inside of the membrane has become less negative as sodium ions accumulate


In relaxed muscle, the myosin-binding site on actin is


blocked by ________.


a) titin


b) troponin


c) myoglobin


d) tropomyosin - ✔✔d) tropomyosin


According to the sliding filament model, binding sites on actin open when ________.

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, a) creatine phosphate levels rise


b) ATP levels rise


c) acetylcholine levels rise


d) calcium ion levels rise - ✔✔d) calcium ion levels rise


The cell membrane of a muscle fiber is called ________.


a) myofibril


b) sarcolemma


c) sarcoplasm


d) myofilament - ✔✔b) sarcolemma


Muscle relaxation occurs when ________.


a) calcium ions are actively transported out of the sarcoplasmic reticulum


b) calcium ions diffuse out of the sarcoplasmic reticulum


c) calcium ions are actively transported into the sarcoplasmic reticulum


d) calcium ions diffuse into the sarcoplasmic reticulum - ✔✔c) calcium ions are actively transported into

the sarcoplasmic reticulum


During muscle contraction, the cross-bridge detaches


when ________.


a) the myosin head binds to an ADP molecule


b) the myosin head binds to an ATP molecule


c) calcium ions bind to troponin


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