Ownclasses

The contractile protein of skeletal muscle involving ATPase activity is

  • tropomyosin

  • myosin

  • α-actinin

  • troponin

The type of muscles present in our

  • heart are involuntary and unstriated smooth muscles

  • intestine are striated and involuntary

  • thigh are striated and voluntary

  • Upper arm are smooth muscle fibres fusiform in shape

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

Stimulation of a muscle fibre by a motor neuron occurs at

  • the neuromuscular junction

  • the transverse tubules

  • the myofibril

  • the sarcoplasmic reticulum

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
     
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