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. |
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. Tetany | I. Decreased levels of estrogen |
B. Muscular dystrophy | II. Autoimmune disorder |
C. Myasthenia | III. Genetic disorder |
D. Osteoporosis | IV. Rapid spasms in muscle |
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. |
a. | ‘H’ zone decreases in length and disappears on full relaxation |
b. | A band remains unchanged |
c. | I band gets reduced in length due to decrease in length of actin filaments |
d. | Myosin hydrolyses ATP, releasing ADP and P1 |
e. | Z- lines move away from each other |
a. | Sarcoplasmic reticulum of the muscle fibres is the storehouse of calcium ions. |
b. | The type of muscles present in our thigh are striated and voluntary. |
c. | The H-zone in the skeletal muscle fibre is due to the central gap between myosin filaments in the A-band. |
d. | Production of body heat and storage of minerals are the functions of the skeletal system. |
Column-I | Column -II | ||
a. | I-band | (i) | Contains both thin and thick filaments |
b. | A-band | (ii) | Elastic fibre that bisects I-band |
c. | M-line | (iii) | Contains thin filaments |
d. | Z-line | (iv) | Thin fibrous membrane |