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), (e) only
2. (b), (d), (e), (a) only
3. (a), (c), (d), (e) only
4. (a), (b), (c), (d) only
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) |
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) |
List I | List II |
A. Tetany | I. Decreased levels of estrogen |
B. Muscular dystrophy | II. Autoimmune disorder |
C. Myasthenia | III. Genetic disorder |
D. Osteoporosis | IV. Rapid spasms in muscle |
List I | List II |
A. Skull | I. 30 |
B. Vertebral column | II. 24 |
C. Ribs | III. 22 |
D. Forelimbs | IV. 26 |
List I | List II |
A. Rheumatoid arthritis | I. Thickening of the arteries |
B. Atherosclerosis | II. Inflammation of synovial membrane |
C. Gout | III. Pain in the chest |
D. Angina pectoris | IV. Accumulation of uric acid crystals in synovial joints |
A. | Increase in Ca++ concentration level leads to the binding of calcium with a subunit of troponin on actin filaments. and thereby removes the masking of active sites for myosin. |
B. | During the shortening of the muscle, A-bands get reduced, whereas, the I-bands retain the length. |
C. | A muscle fibre is a syncytium. |
D. | Isotropic band of a myofibril consists of myosin. |
A. | Locomotion requires a perfectly coordinated activity of the muscular and skeletal system only. |
B. | Macrophages as well as erythrocytes in blood move using pseudopodia formed by the streaming of protoplasm. |
C. | Movement of tongue uses contractile property of muscles. |
D. | Methods of locomotion performed by animals vary with their habitats and the demand of the situation. |