| Red Muscle Fibre | White Muscle Fibre |
| Red muscle fibres are thinner and smaller than white muscle fibres. |
White muscle fibres are thicker and larger than red muscle fibres. |
| They are red in colour because they possess large amounts of myoglobin. |
They are white in colour because they possess small amounts of myoglobin. |
| They have mitochondria in large numbers. | They have a comparatively smaller number of mitochondria. |
| They carry out a slow rate of contractions for a long period. |
They carry out a fast rate of contraction for a short duration. |
| They provide energy by performing aerobic respiration |
They provide energy by performing anaerobic respiration |
Fill in the blank spaces:
(a) All mammals (except a few) have __________ cervical vertebra.
(b) The number of phalanges in each limb of human is __________
(c) Thin filament of myofibril contains 2 ‘F’ actins and two other proteins namely____ and _____.
(d) In a muscle fibre \( (Ca^{2+} )\) is stored in __________
(e) __________ and __________ pairs of ribs are called floating ribs.
(f) The human cranium is made of __________ bones
Name the type of joint between the following:-
(a) atlas/axis
(b) carpal/metacarpal of thumb
(c) Between phalanges
(d) femur/acetabulum
(e) Between cranial bones
(f) Between pubic bones in the pelvic girdle
How do you distinguish between a skeletal muscle and a cardiac muscle?
What are the different types of movements exhibited by the cells of the human body?
Match Column I with Column II:
| Column I | Column II |
| (a) Smooth Muscle | (i) Myoglobin |
| (b) Tropomyosin | (ii) Thin Filament |
| (c) Red muscle | (iii) Sutures |
| (d) Skull | (iv) Involuntary |