Human Anatomy Chapter 10- Muscle Tissue and Organization

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dahotstuff30
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Human Anatomy Chapter 10- Muscle Tissue and Organization
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2015-02-24 22:17:09
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atrophy pennate
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Human Anatomy McKinley Chapter 10- Muscle Tissue and Organization
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  1. Individual skeletal muscle cells are known as

    A)myotomes
    B)muscle fibers
    C)myofibrils
    D)myofilaments
    B)muscle fibers
    (this multiple choice question has been scrambled)
  2. All of the following are functions of skeletal muscle tissue except

    A)cooling of the body
    B)body movement
    C)maintenance of posture
    D)storage and movement of materials
    A)cooling of the body
    (this multiple choice question has been scrambled)
  3. The three types of muscle tissue are

    A)striated, unstriated, and rough
    B)striated, skeletal, and voluntary
    C)voluntary, involuntary, and cardiac
    D)skeletal, cardiac, and smooth
    D)skeletal, cardiac, and smooth
    (this multiple choice question has been scrambled)
  4. The layer of dense irregular connective tissue that surrounds the entire skeletal muscle is the

    A)sarcolemma
    B)perimysium
    C)endomysium
    D)epimysium
    D)epimysium
    (this multiple choice question has been scrambled)
  5. What is the cell membrane of a muscle fiber called?

    A)sarcolemma
    B)endomysium
    C)sarcomere
    D)myofibril
    A)sarcolemma
    (this multiple choice question has been scrambled)
  6. Each of the following is an attribute of skeletal muscle fibers except

    A)long and large in diameter
    B)multinucleated
    C)lack striations
    D)possess transverse tubules
    C)lack striations
    (this multiple choice question has been scrambled)
  7. A thick, fibrous connective tissue cord that attaches a muscle to a bone is called

    A)a raphe
    B)a ligament
    C)a tendon
    D)an aponeurosis
    C)a tendon
    (this multiple choice question has been scrambled)
  8. What are the principal proteins of muscle contraction?

    A)myosin and myoglobin
    B)myoglobin and collagen
    C)actin and myoglobin
    D)actin and myosin
    D)actin and myosin
    (this multiple choice question has been scrambled)
  9. Which structures extend into the sarcoplasm as a network of deep invaginations of the sarcolemma?

    A)sarcoplasmic reticula
    B)transverse tubules
    C)cross-bridges
    D)terminal cisternae
    B)transverse tubules
    (this multiple choice question has been scrambled)
  10. The functional contractile units of a skeletal muscle fiber are the

    A)myofilaments
    B)sarcomeres
    C)transverse tubules
    D)sarcolemmae
    B)sarcomeres
    (this multiple choice question has been scrambled)
  11. A nerve impulse triggers the release of what chemical at a neuromuscular junction?

    A)acetylcholine (ACh)
    B)acetylcholinesterase (AChE)
    C)adenosine triphosphate (ATP)
    D)none of the above
    A)acetylcholine (ACh)
    (this multiple choice question has been scrambled)
  12. Which term describes the expanded tip of an axon at a neuromuscular junction?

    A)synaptic knob
    B)synaptic cleft
    C)synaptic vesicle
    D)motor end plate
    A)synaptic knob
    (this multiple choice question has been scrambled)
  13. Which part of a sarcomere contains entire thick filaments and lateral end regions with overlapping thin filaments?

    A)H zone
    B)I band
    C)A band
    D)M line
    C)A band
    (this multiple choice question has been scrambled)
  14. When a muscle fiber contracts, what slides toward the center of each sarcomere?

    A)the thin filaments of actin
    B)both a and b
    C)neither a nor b
    D)the thick filaments of myosin
    A)the thin filaments of actin
    (this multiple choice question has been scrambled)
  15. A reduction in muscle size, tone, and power is called

    A)hypertrophy
    B)a spasm
    C)atrophy
    D)hyperplasia
    C)atrophy
    (this multiple choice question has been scrambled)
  16. A muscle impulse travels deep into the muscle fiber along

    A)myofibrils
    B)the sarcolemma
    C)T-tubule membranes
    D)the endomysium
    C)T-tubule membranes
    (this multiple choice question has been scrambled)
  17. A single motor neuron, the muscle fibers it controls, and the neuromuscular junctions in between constitute a

    A)motor end plate
    B)sarcomere
    C)synaptic terminal
    D)motor unit
    D)motor unit
    (this multiple choice question has been scrambled)
  18. When stimulated by a muscle impulse, what do the terminal cisternae release into the sarcoplasm?

    A)sodium ions, Na+
    B)adenosine triphosphate, ATP
    C)calcium ions, Ca2+
    D)acetylcholine, ACh
    C)calcium ions, Ca2+
    (this multiple choice question has been scrambled)
  19. The arrangement of tendons and fascicles in a ____________ muscle resembles the structure of a feather.

    A)convergent
    B)pennate
    C)circular
    D)parallel
    B)pennate
    (this multiple choice question has been scrambled)
  20. Types of skeletal muscle fibers include

    A)fast
    B)intermediate
    C)slow
    D)all of the above
    D)all of the above
  21. Muscle fibers are arranged concentrically in

    A)convergent muscles
    B)pennate muscles
    C)parallel muscles
    D)circular muscles
    D)circular muscles
    (this multiple choice question has been scrambled)
  22. Types of pennate muscles include which of the following?

    A)multipennate
    B)bipennate
    C)unipennate
    D)all of the above
    D)all of the above
  23. Attributes of a convergent muscle include all of the following except

    A)direction of pull can be changed readily
    B)fascicles insert obliquely onto a tendon extending through the muscle
    C)widespread muscle fibers converge on a common attachment site
    D)does not pull as forcefully as a parallel muscle of equal size
    B)fascicles insert obliquely onto a tendon extending through the muscle
    (this multiple choice question has been scrambled)
  24. The most common levers in the body are ____________ levers.

    A)fourth-class
    B)third-class
    C)first-class
    D)second-class
    B)third-class
    (this multiple choice question has been scrambled)
  25. Most muscles are attached at one end to a less movable point known as the

    A)tendon
    B)origin
    C)insertion
    D)belly
    B)origin
    (this multiple choice question has been scrambled)
  26. A muscle is classified functionally as an agonist when

    A)it contracts together with another muscle to assist in a given action
    B)its actions work in opposition to the movement being considered
    C)it is the main muscle that contracts to produce a particular movement
    D)its contraction prevents movement and thereby stabilizes a joint
    C)it is the main muscle that contracts to produce a particular movement
    (this multiple choice question has been scrambled)
  27. Which of the following describes a first-class lever?

    A)the fulcrum is situated between the force and the resistance
    B)the resistance is located between the fulcrum and the applied force
    C)a force is applied between the resistance and the fulcrum
    D)none of the above
    A)the fulcrum is situated between the force and the resistance
    (this multiple choice question has been scrambled)
  28. All of the following characteristics are used in naming muscles except

    A)action
    B)color
    C)size
    D)shape
    B)color
    (this multiple choice question has been scrambled)
  29. The deltoid muscle is named on the basis of its

    A)shape
    B)size
    C)attachment
    D)action
    A)shape
    (this multiple choice question has been scrambled)
  30. Of the following terms used in muscle names, which one refers to a specific body region?

    A)gluteus
    B)quadriceps
    C)trapezius
    D)fibularis
    A)gluteus
    (this multiple choice question has been scrambled)
  31. Which of the following characterizes both skeletal and smooth muscle cells?

    A)voluntary control
    B)multinucleated
    C)excitable
    D)striated
    C)excitable
    (this multiple choice question has been scrambled)
  32. The "muscular system" includes muscles in which of these locations?

    A)surrounding the orbit
    B)around the pupil of the eye
    C)in the wall of the heart
    D)in the wall of the stomach
    A)surrounding the orbit
    (this multiple choice question has been scrambled)
  33. How do skeletal muscle fibers get multiple nuclei?

    A)multiple mitotic divisions without cytokinesis
    B)both a and b
    C)fusion of embryonic myoblasts
    D)neither a nor b
    C)fusion of embryonic myoblasts
    (this multiple choice question has been scrambled)
  34. In skeletal muscle fibers, where do calcium ions occur at varying concentrations?

    A)in the terminal cisternae of the sarcoplasmic reticulum
    B)throughout the sarcoplasm
    C)in regions where the thin and thick filaments overlap
    D)all of the above
    D)all of the above
  35. In what order would a scalpel first penetrate these layers of connective tissue upon cutting into the biceps brachii muscle: (1) endomysium (2) epimysium (3) perimysium

    A)2, 3, 1
    B)2, 1, 3
    C)1, 3, 2
    D)3, 2, 1
    A)2, 3, 1
    (this multiple choice question has been scrambled)
  36. Which list of muscle structures proceeds from smaller to larger in diameter?

    A)myofilament, fascicle, muscle fiber, myofibril
    B)myofibril, fascicle, muscle fiber, myofilament
    C)fascicle, myofibril, muscle fiber, myofilament
    D)myofilament, myofibril, muscle fiber, fascicle
    D)myofilament, myofibril, muscle fiber, fascicle
    (this multiple choice question has been scrambled)
  37. What are satellite cells?

    A)part of the endomysium
    B)epithelial stem cells
    C)unfused myoblasts
    D)part of the epimysium
    C)unfused myoblasts
    (this multiple choice question has been scrambled)
  38. Blood vessels and nerve fibers that supply skeletal muscle fibers must penetrate the

    A)epimysium, perimysium, and endomysium
    B)neither a nor b
    C)both a and b
    D)sarcolemma and superficial fascia
    A)epimysium, perimysium, and endomysium
    (this multiple choice question has been scrambled)
  39. Synaptic knobs are to axons as ____________ are to sarcolemmae, in that both are structural modifications involved in transmitting electrochemical signals across the synaptic cleft.

    A)sarcoplasmic reticula
    B)transverse tubules
    C)motor end plates
    D)synaptic vesicles
    C)motor end plates
    (this multiple choice question has been scrambled)
  40. Skeletal muscle contraction involves which of the following events?

    A)a nerve impulse followed by a muscle impulse
    B)release of calcium ions from terminal cisternae
    C)tropomyosin moving to expose active sites on actin molecules
    D)all of the above
    D)all of the above
  41. Of the following, which is the first to occur during muscle contraction?

    A)crossbridges link thick and thin filaments
    B)actin slides past myosin
    C)myofibrils shorten and pull on ends of sarcolemma
    D)sarcomeres shorten
    A)crossbridges link thick and thin filaments
    (this multiple choice question has been scrambled)
  42. In the sliding filament mechanism, crossbridges are

    A)myosin heads that bind to active sites on a thin filament
    B)chemical bonds that pull a thick filament toward the center of a sarcomere
    C)actin heads that bind to active sites on another thin filament
    D)all of the above
    A)myosin heads that bind to active sites on a thin filament
    (this multiple choice question has been scrambled)
  43. Interactions between thick and thin filaments during muscle contraction occur in which sequence?

    A)attach, detach, pivot, return
    B)detach, pivot, return, attach
    C)pivot, attach, detach, return
    D)attach, pivot, detach, return
    D)attach, pivot, detach, return
    (this multiple choice question has been scrambled)
  44. What actually shortens when a muscle fiber contracts?

    A)thick and thin filaments
    B)sarcomeres, H zones, and I bands
    C)both b and c
    D)A bands, M lines, and Z discs
    B)sarcomeres, H zones, and I bands
    (this multiple choice question has been scrambled)
  45. How many motor end plates does a typical skeletal muscle fiber contain?
    A)dozens scattered along the sarcolemma
    B)one at each end
    C)only one
    D)too variable to determine
    C)only one
    (this multiple choice question has been scrambled)
  46. Rigor mortis demonstrates that skeletal muscle tissue

    A)normally requires energy to end as well as to start a contraction
    B)can survive and function for some time after the heart stops beating
    C)maintains powerful contractions even with no ATP, until autolysis occurs
    D)all of the above
    D)all of the above
  47. For any given muscle, the total force exerted by a contraction depends on

    A)the length of each muscle fiber
    B)the type of contraction
    C)the degree of muscle tone prior to contraction
    D)the number of activated motor units
    D)the number of activated motor units
    (this multiple choice question has been scrambled)
  48. Physical conditioning can effectively decrease the proportion of which type of muscle fibers?

    A)fast
    B)intermediate
    C)slow
    D)none of the above
    A)fast
    (this multiple choice question has been scrambled)
  49. Reflecting their different needs, fast muscle fibers contain large ____________ reserves whereas slow fibers contain the oxygen-carrying pigment ____________.

    A)glycogen; myoglobin
    B)myoglobin; glycogen
    C)fat; hemoglobin
    D)hemoglobin; myoglobin
    A)glycogen; myoglobin
    (this multiple choice question has been scrambled)
  50. An overdose of acetylcholinesterase inhibitors could produce effects most similar to those of

    A)botulism
    B)tetanus
    C)Botox treatments
    D)flaccid paralysis
    B)tetanus
    (this multiple choice question has been scrambled)
  51. Among the patterns of fascicle arrangements, ____________ muscles can move their tendons farther but ____________ muscles of the same size are stronger.

    A)parallel; pennate
    B)pennate; circular
    C)circular; convergent
    D)convergent; parallel
    A)parallel; pennate
    (this multiple choice question has been scrambled)
  52. In the limbs, the insertion of a muscle typically lies

    A)lateral to the origin
    B)proximal to the origin
    C)at its origin
    D)distal to the origin
    D)distal to the origin
    (this multiple choice question has been scrambled)
  53. In terms of ability to produce ATP, cardiac muscle fibers are most like

    A)slow skeletal muscle fibers
    B)fast skeletal muscle fibers
    C)intermediate skeletal muscle fibers
    D)smooth muscle fibers
    A)slow skeletal muscle fibers
    (this multiple choice question has been scrambled)
  54. Z discs are to skeletal muscle as ____________ are to smooth muscle.

    A)sarcomeres
    B)transverse tubules
    C)dense bodies
    D)myofilaments
    C)dense bodies
    (this multiple choice question has been scrambled)
  55. Aging affects the muscular system in all of the following ways except

    A)decrease in diameter of skeletal muscle fibers
    B)decrease in ability to recover from disease or injury
    C)decrease in number of myofibrils and myofilaments in existing muscle fibers
    D)decrease in amount of connective tissue within muscles
    D)decrease in amount of connective tissue within muscles
    (this multiple choice question has been scrambled)

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