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 |
(a) | Locomotion, changes of body postures and heat production are some of the functions of skeletal muscle tissue |
(b) | Actin filaments are firmly attached to the Z-line |
(c) | The portion of myofibril between non-consecutive 'Z' lines is called sacromere |
(d) | Muscles constitute more than 50% of the body weight in an adult human |
a | b | c | d | |
1. | T | T | T | T |
2. | T | F | F | T |
3. | T | T | F | F |
4. | F | T | T | T |
Options | I | II | III | IV |
1. | T | T | T | T |
2. | T | F | T | F |
3. | F | T | F | T |
4. | T | T | F | T |
A: | Muscle bundles are held together by collagenous connective tissue layer called fascicle. |
B: | Sarcoplasmic reticulum of muscle fibre is a store house of calcium ions. |
C: | Striated appearance of skeletal muscle fibre is due to distribution pattern of actin and myosin proteins. |
D: | M line is considered as functional unit of contraction called sarcomere. |
1. | C and D only | 2. | A, B and C only |
3. | B and C only | 4. | A, C and D only |