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    20 Multiple choice questions on muscles and bones

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    1. The basic unit of contraction is the
    a. myosin
    b. actin
    c. Z-Lines
    d. sarcomeres

    2. A cord or strap of dense tissue that connects a muscle to bone is called a:
    a. tendon
    b. ligament
    c. bursa
    d. arthritis

    3. The functional partners of bone is:
    a. Tendon
    b. Ligament
    c. Skeletal muscle
    d. Fasciae

    4. What are dark bands that define the two ends of each sacromeres called.
    a. myosin
    b. actin
    c. Z-Lines
    d. sarcomeres

    5. This is the explanation of how muscles contract.
    a. Lock and Key Hypothesis
    b. Cell Theory
    c. Mendels laws
    d. Sliding filament model

    6. The "thick" muscle filament is composed of:
    a. myosin
    b. actin
    c. Z-Lines
    d. sarcomeres

    7. After intense exercise, what helps repay the body's oxygen debt?
    a. stretching
    b. breathing
    c. eating
    d. thinking

    8. A motor unit is made up of _________________
    a. all the muscle fibers within a given muscle
    b. a motor neuron and the muscle fibers it innervates
    c. all the neurons going into an individual section of the body
    d. a fascicle and a nerve

    9. The structure that connects muscles to bones is the ______
    a. aponeurosis
    b. fascicle
    c. tendon
    d. ligament

    10. The fiber cell membrane is termed the ______
    a. myofibril
    b. myosin
    c. myofilament
    d. sarcolemma

    11. Which of the following does not belong with the others?
    a. filament
    b. myosin
    c. myofibril
    d. actin

    12. The smallest, functional unit of contraction is the
    a. fiber
    b. sarcomere
    c. filament
    d. myofibril

    13. What type of contraction is characterized by a rapid, jerky response to a single
    stimulus?
    a. summation
    b. treppe
    c. tonic
    d. twitch

    14. Which of the following is not performed by muscles?
    a. motion
    b. excretion
    c. maintenance of posture
    d. heat production

    15. Muscle tissue refers to all contractile tissue. To what does the term muscular system
    most often refer?
    a. skeletal muscle system
    b. cardiac muscle system
    c. visceral muscle system
    d. computerized muscle tissue

    16. The all-or-none response means that
    a. all of the muscles in a region contract together.
    b. all of the muscle fibers within a muscle contract together.
    c. when a muscle fiber contracts, it contracts completely.
    d. when a muscle fiber contracts, all of its ATP is changed to ADP

    17. What are the actin and myosin filaments in muscle composed of?
    a. Nucleic acids
    b. Fatty acids
    c. Proteins
    d. Carbohydrates

    18. What triggers the release of calcium ions from the sarcoplasmic reticulum?
    a. Formation of actin-myosin cross-bridges
    b. Sarcomere contraction
    c. An action potential
    d. An increase in calcium ion concentration

    19. A skeletal muscle is stimulated to contract when its plasma membrane is excited by a
    message from a_____________ . This message is received at the neuromuscular
    junction.
    a. sensory neuron
    b. motor unit
    c. motor neuron
    d. sarcoplasm

    20. Approximately how many skeletal muscles are there in the human body?
    a. 1,000
    b. 600
    c. 100
    d. 60

    © BrainMass Inc. brainmass.com April 3, 2020, 2:43 pm ad1c9bdddf
    https://brainmass.com/biology/musculoskeletal-system/20-multiple-choice-questions-on-muscles-and-bones-44113

    Solution Preview

    1. The basic unit of contraction is the
    a. myosin
    b. actin
    c. Z-Lines
    d. sarcomeres

    Answer: d. sarcomeres

    2. A cord or strap of dense tissue that connects a muscle to bone is called a:
    a. tendon
    b. ligament
    c. bursa
    d. arthritis

    Answer: a. tendon
    Skeleton muscles are joined to bone by tough connective tissue called tendons.
    Bursa - a fluid-filled sac in the knee and shoulder joints to cushion the bones.
    Ligament - tough, flexible bands of connective tissue holding bone to bone at joints.
    Tendon - tough, inflexible bands of connective tissue attaching muscle to bone

    3. The functional partners of bone is:
    a. Tendon
    b. Ligament
    c. Skeletal muscle
    d. Fasciae

    Answer: c. Skeletal muscle
    The Skeleton and its joints support, protect, and provide flexibility for the body, but the Skeleton cannot move itself. That job is performed by the Muscle Tissue.
    Tendon connects bone to muscle. Ligaments join bone to bone.

    4. What are dark bands that define the two ends of each sacromeres called.
    a. myosin
    b. actin
    c. Z-Lines
    d. sarcomeres

    Answer: c. Z-Lines
    The Region From one Z-line to the next is called a sarcomere.

    5. This is the explanation of how muscles contract.
    a. Lock and Key Hypothesis
    b. Cell Theory
    c. Mendels laws
    d. Sliding filament model

    Answer: d. Sliding filament model

    6. The "thick" muscle filament ...

    Solution Summary

    Answers and explanations to 20 Multiple choice questions on muscles and bones.

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