I: | is a specialised tissue of endodermal origin. |
II: | contributes about 20-30 per cent of the body weight of a human adult. |
COLUMN I | COLUMN II | ||
A | Skeletal | P | Unstriated and Involuntary |
B | Smooth | Q | Striated and Voluntary |
C | Cardiac | R | Striated and Involuntary |
A | B | C | |
1. | P | Q | R |
2. | R | Q | P |
3. | Q | P | R |
4. | P | R | Q |
I: | Z line | an attachment point for actin molecules |
II: | M line | an attachment point for myosin molecules |
III: | A band | a band where only actin molecules are found |
IV: | I band | a band where only myosin molecules are found |
I: | It is a polymerised protein. |
II: | The HMM component is the the head and short arm. |
III: | The globular head is an active ATPase enzyme and has binding sites for ATP and active sites for actin. |
I: | the ‘I’ bands get reduced |
II: | the ‘A’ bands retain the length |
I: | cervical region with 7 vertebrae |
II: | thoracic region with 12 vertebrae (12) |
III: | lumbar region with 4 vertebrae |
IV: | sacral (2-fused) and coccygeal (2-fused) regions |
1. | is a U-shaped bone in the neck |
2. | is a flat bone on the ventral midline of thorax |
3. | is a small bone commonly found embedded within a muscle or tendon |
4. | provides attachment to floating ribs |
Statement I: | Each rib is a thin flat bone connected ventrally to the vertebral column and dorsally to the sternum. |
Statement II: | Each rib has two articulation surfaces on its ventral end and is hence called bicephalic. |