Q. No.Muscle:
I: is derived from embryonic endoderm
II: constitutes about 40-50 percent of human body
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
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Regarding a skeletal muscle fibre:
I: It is a syncytium.
II: It has sarcoplasmic reticulum [a type of smooth ER] that stores calcium.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
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1. Anisotropic band mainly contains myosin.
2. Isotropic band consists of actin.
3. The thick filaments are held together by an M-line.
4. Actin and myosin are arranged perpendicular to each other and also to the longitudinal axis of myofibrils.
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1. Binding of ATP to its site on myosin head
2. Binding of calcium with a subunit of troponin
3. Binding of acetylcholine to its receptor on sarcolemma
4. Release of acetylcholine by anterior motor neuron
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| Statement I: | Red fibres are ‘red’ due to large amount of myoglobin. |
| Statement II: | Red muscles are also called as aerobic muscles. |
| 1. | Both Statement I and Statement II are correct and Statement II explains Statement I |
| 2. | Both Statement I and Statement II are correct but Statement II does not explain Statement I |
| 3. | Statement I is correct but Statement II is incorrect |
| 4. | Statement I is incorrect but Statement II is correct |
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| I: | Repeated activation of muscles can lead to fatigue. |
| II: | Repeated activation of muscles can lead to accumulation of lactic acid. |
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. I is incorrect but II is correct
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Consider the given statements regarding the human skull:
| I: | It has a total of 22 bones. |
| II: | Cranial bones are 14 in number and the facial bones are 8 in number. |
| III: | It is monocondylic. |
| IV: | A single hyoid bone is located at the base of the buccal cavity. |
The correct statements include:
| 1. | Only I | 2. | Only I and IV |
| 3. | Only II and III | 4. | Only I, II, and IV |
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Consider the given statements regarding the human vertebral column:
| I: | In adults, it is differentiated into cervical [7], thoracic [12], lumbar [5], sacral [1-fused] and coccygeal [1-fused] regions. |
| II: | The first vertebra is called as axis and it articulates with the occipital condyles. |
| III: | The spinal cord runs through a neural canal. |
| IV: | It protects the spinal cord, supports the head and serves as the point of attachment for the ribs and musculature of the back. |
The correct statements include:
| 1. Only I | 2. Only I and IV |
| 3. Only II and III | 4. Only I, III, and IV |
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I: have two articulation surfaces on its dorsal end and are hence called bicephalic.
II: connect to the sternum directly or indirectly with the help of hyaline cartilage.
| 1. Only I is correct | 2. Only II is correct |
| 3. Both are correct | 4. Both are incorrect |
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Identify the incorrect statement:
| 1. | Each limb in humans has 30 bones. |
| 2. | Metacarpals are 8 in number while the metatarsals are 7 in number. |
| 3. | Patella forms the knee cap. |
| 4. | Femur is the longest bone in the human body. |
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