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Q. No.During muscular contraction, which of the following events occur?
(a)
'H' zone disappears
(b)
'A' band widens
(c)
'I' band reduces in width
(d)
Myosin hydrolyzes ATP, releasing the ADP and Pi
(e)
Z-lines attached to actins are pulled inwards
Choose the correct answer from the options given below:
1. (b), (c), (d) and (e) only
2. (b), (d), (e) and (a) only
3. (a), (c), (d) and (e) only
4. (a), (b), (c) and (d) only
Subtopic: Sliding Filament Theory |
82%
Level 1: 80%+
NEET - 2021
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Match List-I with List-II
| List-I | List-II | ||
| (a) | Scapula | (i) | Cartilaginous joints |
| (b) | Cranium | (ii) | Flat bone |
| (c) | Sternum | (iii) | Fibrous joints |
| (d) | Vertebral column | (iv) | Triangular flat bone |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (iv) | (ii) | (iii) | (i) |
| 2. | (iv) | (iii) | (ii) | (i) |
| 3. | (i) | (iii) | (ii) | (iv) |
| 4. | (ii) | (iii) | (iv) | (i) |
Subtopic: Axial Skeleton: II | Appendicular Skeleton: Girdle | Fibrous & Catilaginous Joints |
81%
Level 1: 80%+
NEET - 2021
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Chronic auto immune disorder affecting neuro muscular junction leading to fatigue, weakening and paralysis of skeletal muscle is called as:
| 1. | Myasthenia gravis | 2. | Gout |
| 3. | Arthritis | 4. | Muscular dystrophy |
Subtopic: Disorders of Muscular and Skeletal System |
81%
Level 1: 80%+
NEET - 2021
Hints
Match the following columns and select the correct option:
| Column I | Column II | ||
| (a) | Gout | (i) | Decreased levels of estrogen |
| (b) | Osteoporosis | (ii) | Low Ca++ ions in the blood |
| (c) | Tetany | (iii) | Accumulation of uric acid crystals |
| (d) | Muscular dystrophy | (iv) | Autoimmune disorder |
| (v) | Genetic disorder |
| Options: | (a) | (b) | (c) | (d) |
| 1. | (ii) | (i) | (iii) | (iv) |
| 2. | (iii) | (i) | (ii) | (v) |
| 3. | (iv) | (v) | (i) | (ii) |
| 4. | (i) | (ii) | (iii) | (iv) |
Subtopic: Disorders of Muscular and Skeletal System |
90%
Level 1: 80%+
NEET - 2020
Hints
Which of the following is present between the adjacent bones of the vertebral column?
1. Smooth muscle
2. Intercalated discs
3. Cartilage
4. Areolar tissue
1. Smooth muscle
2. Intercalated discs
3. Cartilage
4. Areolar tissue
Subtopic: Fibrous & Catilaginous Joints |
69%
Level 2: 60%+
NEET - 2022
Hints
Given below are two statements:
In the light of the above statements, choose the most appropriate answer from the options given below:
| Assertion (A): | Osteoporosis is characterised by decreased bone mass and increased chances of fractures. |
| Reason (R): | Common cause of osteoporosis is increased levels of estrogen. |
| 1. | (A) is not correct but (R) is correct. |
| 2. | Both (A) and (R) are correct and (R) is the correct explanation of (A). |
| 3. | Both (A) and (R) are correct but (R) is not the correct explanation of (A). |
| 4. | (A) is correct but (R) is not correct. |
Subtopic: Disorders of Muscular and Skeletal System |
77%
Level 2: 60%+
NEET - 2022
Hints
Which of the following is a correct match for disease and its symptoms?
| 1. | Muscular dystrophy | An auto immune disorder causing progressive degeneration of skeletal muscle |
| 2. | Arthritis | Inflamed joints |
| 3. | Tetany | high Ca2+ level causing rapid spasms. |
| 4. | Myasthenia gravis | Genetic disorder resulting in weakening and paralysis of skeletal muscle |
Subtopic: Disorders of Muscular and Skeletal System |
73%
Level 2: 60%+
NEET - 2022
Hints
Which of the following is correct statement ?
| 1. | Actin and regulatory proteins are located in thin filament. |
| 2. | Z-lines anchor myosin (thick) filament to the ends of the sarcomere. |
| 3. | Sarcoplasmic reticulum stores acetylcholine. |
| 4. | Myosin cross bridges contain calcium binding sites. |
Subtopic: Skeletal Muscle: Myofilaments |
69%
Level 2: 60%+
NEET - 2022
Hints
According to the sliding filament theory:
| 1. | Actin and myosin filaments slide over each other to increase the length of the sarcomere. |
| 2. | Length of A–band does not change. |
| 3. | I–band increases in length |
| 4. | The actin filaments slide away from A–band resulting in shortening of sarcomere |
Subtopic: Sliding Filament Theory |
75%
Level 2: 60%+
NEET - 2022
Hints
Gout is a type of disorder which leads to:
| 1. | Inflammation of joints due to accumulation of uric acid crystals |
| 2. | Weakening of bones due to decreased bone mass |
| 3. | Inflammation of joints due to cartilage degeneration |
| 4. | Weakening of bones due to low calcium level |
Subtopic: Disorders of Muscular and Skeletal System |
93%
Level 1: 80%+
NEET - 2022
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