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 Multiple Choice QuestionsMultiple Choice Questions

1.

Select the correct statement with respect to locomotion in humans

  • A decreased level of progesterone cause osteoporosis in old people

  • Accumulation of uric acid crystals in joints causes their inflammation.

  • The vertebral column has 10 thoracic

  • The joint between adjacent vertebrae is a fibrous joint.


B.

Accumulation of uric acid crystals in joints causes their inflammation.

Inflammation of joints due to the accumulation of uric acid crystals is gout.The fibrous joint is formed by the flat skull bones, which fuse end - to -end with the help of dense fibrous connective tissue in the form of sutures to form cranium. The vertebral column is formed by 26 serially arranged units called vertebral. The less secretion of progesterone cause abortion as it basically supports a pregnancy.

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2.

The H -zone in the skeletal muscle fibre is due to

  • the absence of myofibrils in the central portion of A-band

  • the central gap between myosin filaments in the A-band

  • the central gap between actin filaments extending through myosin filaments in the A-band

  • extension of myosin filaments in the central portion of the A-band


C.

the central gap between actin filaments extending through myosin filaments in the A-band

H-zone in skeletal muscle is the central gap between actin filaments extending through myosin filaments in the A -band. Alternate myosin filaments in the A-band. An alternate arrangement of dark and light bands gives the striated appearance to a skeletal muscle. At the centre of A-band, a comparatively less dark zone called H -zone is present. In the centre of H-zone, M -line is present, formed by the threats that connect the myofilaments.

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3.

Select the correct statement regarding the specific disorder of muscular or skeletal system

  • Muscular dystrophy-age related shortening of muscles

  • Osteoporosis-decrease in bone mass and higher chances of fractures with advancing age

  • Myasthenia gravis-Auto immune disorder which inhibits sliding of myosin filaments

  • Gout-inflammation of joints due to extra deposition of calcium


B.

Osteoporosis-decrease in bone mass and higher chances of fractures with advancing age

Osteoporosis is age-related disease in which bone loose minerals and fibres from the matrix causing decreased bone mass and higher chances of fractures with advancing age. Major causative factors of osteoporosis are imbalance of hormones like calcitonin of thyroid, parathormone of parathyroids, sex hormones and deficiencies of calcium and vitamins. 

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4.

The characteristics and an example of a  synovial joint in humans is

  • Characteristics

    Examples

    Fluid cartilage between two bones, limited movements

    Knee joints

  • Characteristics

    Examples

    Fluid filled between two joints, provides cushion

    Skull bones

  • Characteristics

    Examples

    Fluid filled synovial cavity between two bones

    Joint between atlas and axis

  • Characteristics

    Examples

    Lymph filled between two bones, limited movement

    Gilding joint between carpals


C.

Characteristics

Examples

Fluid filled synovial cavity between two bones

Joint between atlas and axis

The joint between atlas an axis in the pivot, which is an example of synovial joint characterised by the presence of a fluid -filled the synovial cavity between the articulating surface of the two bones. Knee joint (hinge joint) is a synovial joint characterised by the presence of fluid-filled synovial cavity between the articulating surface of the two Bones. Fluid cartilage between two bones having limited movements is slightly movable joint. In freely movable joints fluid filled between two joints provides a cushion in gliding joint. the articulating bones can slide upon another.

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5.

Which of the following joints would allow no movement?

  • Fibrous joint

  • Cartilaginous joint

  • Synovial Joint

  • Ball and Socket joint


A.

Fibrous joint

Fibrous joints are immovable joints in that occur between the bones of the cranium and in the tooth sockets. They do not allow movement because the bones are held firmly together by bundles of strong white collagen fibres. The immovable joints are often known as the sutures. The periosteum that covers the bones dips between them as a septum

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6.

Stimulation of a muscle fibre by a motor neuron occurs at

  • the neuromuscular junction

  • the transverse tubules

  • the myofibril

  • the sarcoplasmic reticulum


A.

the neuromuscular junction

Stimulation of a muscle fibre by a motor neurone occurs at neuromuscular junction neuron activated a muscle to contract during the excitation-contraction coupling of vertebrate skeletal muscles

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7.

Lack of relaxation between successive stimuli in sustained muscle contraction is known as

  • fatigue

  • tetanus

  • tonus

  • spasm


B.

tetanus

Tetanus results in sustained muscular spasms. This is due to muscle fatigue.

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8.

Select the correct matching of the type of the joint with the example in human skeletal system

  • Types of joint

    Example

    Cartilaginous joint

    Between frontal and parietal

  • Types of joint

    Example

    Pivot joint

    Between third and fourth cervical vertebrae
  • Types of joint

    Example

    Hinge joint

    Between humerus and pectoral girdle
  • Types of joint

    Example

    Gliding Joint

    Between carpals
     

D.

Types of joint

Example

Gliding Joint

Between carpals
 

Gliding joint is a type of synovial joint, found between carpal bones and tarsal bones.

The cartilaginous joint between surfaces of skull bones. The pivot joint is found between the atlas and axis. Hing joint is found in the elbow, knee ankle and interphalangeal joint.

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9.

Which type of tissue correctly matches with its location?

  • Tissue Location
    Areolar tissue Tendons
  • Tissue Location
    ATransitional epithelium Teip of nose

  • Tissue Location
    Cuboidal epithelium Tlining of stomach

  • Tissue Location
    Smooth muscle Wall of intestine


D.

Tissue Location
Smooth muscle Wall of intestine

Columnar epithelium is present in the stomach lining.
Tendon is dense connective tissue and connects muscle to bone.
Tip of nose consists of elastic cartilage. 

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10.

Which of the following is not a function of the skeletal system?

  • Production of erythrocytes

  • Storage of minerals

  • Production of body heat

  • Locomotion


C.

Production of body heat

Production of body heat is the function of muscles. The contraction of muscle produce heat, which keeps the body warm during the winters. 

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