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
the central gap between actin filaments extending through myosin filaments in 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.
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 |
| Cuboidal epithelium | Tlining of stomach |
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 |
|
Fluid filled synovial cavity between two bones |
Joint between atlas and axis |
Lack of relaxation between successive stimuli in sustained muscle contraction is known as
fatigue
tetanus
tonus
tonus
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 vertebral column has 10 thoracic
