Anatomy Muscle Review Quiz

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| By Sarahmcmahon
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Sarahmcmahon
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Quizzes Created: 1 | Total Attempts: 185
Questions: 10 | Attempts: 186

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Muscle Anatomy Quizzes & Trivia

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Questions and Answers
  • 1. 

    Who developed the Sliding Filament Theory?

    • A.

      LeBron James

    • B.

      Hugh Huxley

    • C.

      Albert Einstein

    • D.

      Lance Armstrong

    Correct Answer
    B. Hugh Huxley
    Explanation
    Hugh Huxley is the correct answer because he was one of the scientists who developed the Sliding Filament Theory. This theory explains how muscles contract and is a fundamental concept in muscle physiology. LeBron James, Albert Einstein, and Lance Armstrong are not associated with the development of this theory.

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  • 2. 

    At rest, _________ cannot pull on actin because tropomyosin is in the way.

    • A.

      Myosin

    • B.

      Tryponin

    • C.

      Sarcomere

    • D.

      Calcium ions

    Correct Answer
    A. Myosin
    Explanation
    At rest, myosin cannot pull on actin because tropomyosin is in the way. Tropomyosin is a protein that covers the binding sites on actin, preventing myosin from attaching and initiating muscle contraction. When calcium ions are released, they bind to troponin, causing a conformational change that moves tropomyosin away from the binding sites, allowing myosin to bind to actin and initiate muscle contraction. Therefore, myosin is unable to pull on actin when tropomyosin is in the way.

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  • 3. 

    What is the name of the thick filament?

    • A.

      Tropomyosin

    • B.

      Actin

    • C.

      Troponin

    • D.

      Myosin

    Correct Answer
    D. Myosin
    Explanation
    Myosin is the correct answer because it is the name of the thick filament in muscle cells. Thick filaments are responsible for generating the force required for muscle contraction. Myosin molecules have a long tail and a globular head, which interacts with actin filaments during the contraction process. Tropomyosin and troponin are proteins associated with actin filaments, but they are not the thick filament itself.

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  • 4. 

    What is the name of the thin filament?

    • A.

      Actin

    • B.

      Myosin

    • C.

      ATP

    • D.

      Calcium ions

    Correct Answer
    A. Actin
    Explanation
    Actin is the name of the thin filament in muscle cells. It is a protein that plays a crucial role in muscle contraction. Actin filaments slide past myosin filaments during contraction, causing the muscle to shorten. ATP provides the energy for this sliding process, while calcium ions regulate the interaction between actin and myosin. However, the specific thin filament referred to in the question is actin.

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  • 5. 

    What is the reversal of electrical charge of sarcolemma called?

    • A.

      Depolarization

    • B.

      Vesicle

    • C.

      Glycolysis

    • D.

      ATP

    Correct Answer
    A. Depolarization
    Explanation
    Depolarization refers to the reversal of electrical charge of the sarcolemma, which is the cell membrane of muscle fibers. During depolarization, the electrical charge inside the sarcolemma becomes more positive, leading to the contraction of muscle fibers. This process is crucial for muscle contraction and is essential for various physiological processes such as movement and muscle coordination.

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  • 6. 

    What is the bottom of a motor nerve called?

    • A.

      T- tubule

    • B.

      Sarcoplasmic reticulum

    • C.

      Axon terminal

    • D.

      Vesicle

    Correct Answer
    C. Axon terminal
    Explanation
    The bottom of a motor nerve is called the axon terminal. The axon terminal is the end of the nerve fiber that forms a synapse with a target cell, such as a muscle fiber. It is responsible for transmitting signals from the nerve to the target cell, allowing for the coordination of muscle contractions and movement.

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  • 7. 

    The sarcoplasmic reticulum holds ______?

    • A.

      ATP

    • B.

      Vesicles

    • C.

      ADP

    • D.

      Calcium ions

    Correct Answer
    D. Calcium ions
    Explanation
    The sarcoplasmic reticulum holds calcium ions. Calcium ions play a crucial role in muscle contraction. When a muscle is stimulated, calcium ions are released from the sarcoplasmic reticulum into the muscle fibers. This release of calcium ions triggers a series of events that lead to muscle contraction. Without the sarcoplasmic reticulum holding calcium ions, muscle contraction would not be possible.

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  • 8. 

    Myofibrils are made up of _____?

    • A.

      Myofilaments

    • B.

      Organelles

    • C.

      Fasicles

    • D.

      Cells

    Correct Answer
    A. Myofilaments
    Explanation
    Myofibrils are the contractile units of muscle cells, responsible for muscle contraction. They are composed of smaller structures called myofilaments, which are responsible for generating the force necessary for muscle contraction. Therefore, the correct answer is myofilaments.

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  • 9. 

    Another word for a bundle is a ____?

    • A.

      Fasicle

    • B.

      Myofibril

    • C.

      Calcium ion

    • D.

      Filament

    Correct Answer
    A. Fasicle
    Explanation
    A fasicle is a term used in anatomy to refer to a bundle of muscle fibers. It is another word for a bundle, making it the correct answer to the question. The other options, myofibril, calcium ion, and filament, do not have the same meaning as bundle and are therefore incorrect.

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  • 10. 

    A vesicle holds _______?

    • A.

      Calcium ions

    • B.

      Neurotransmitters

    • C.

      ATP

    • D.

      Depolarization

    Correct Answer
    B. Neurotransmitters
    Explanation
    A vesicle holds neurotransmitters. Neurotransmitters are chemical messengers that transmit signals across synapses in the nervous system. They are stored in vesicles within the presynaptic neuron and released into the synaptic cleft to bind with receptors on the postsynaptic neuron, allowing for the transmission of signals between neurons.

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