I: | Each limb is made of 30 bones. |
II: | Carpals are 8 in number |
III: | Tarsals are 7 in number |
IV: | Metacarpals are 5 in number |
V: | Metatarsals are 4 in number |
I: | is a part of the pectoral girdle. |
II: | articulates with acromion process of scapula and with sternum |
III: | is commonly called the collar bone. |
I: | is a large triangular flat bone situated in the dorsal part of the thorax between the second and the seventh ribs. |
II: | has an expanded process called the acromion. |
III: | has glenoid cavity which articulates with the head of the humerus to form the shoulder joint. |
Assertion(A): | Synovial joints allow considerable movement. |
Reason(R): | Synovial joints are characterised by the presence of a fluid filled synovial cavity between the articulating surfaces of the two bones. |
1. | Both (A) and (R) are True and (R) correctly explains (A). |
2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
3. | Both (A) and (R) are False. |
4. | (A) is True and (R) is False. |
I: | Ball and socket joint | Between humerus and pectoral girdle |
II: | Hinge joint | Knee joint |
III: | Pivot joint | Between atlas and occipital bone |
IV: | Gliding joint | Between the carpals |
V: | Saddle joint | Between carpal and metacarpal of thumb |
1. | arthritis in multiple joints of the body |
2. | wild contractions in muscle due to low Ca2+ in body fluid |
3. | flaccid paralysis due to high K+ in body fluid |
4. | atrophy of muscle due to prolonged disuse |
Assertion (A): | The incidence of osteoporosis is higher in post-menopausal women. |
Reason (R): | Post-menopausal women have a decreased level of estrogen. |
1. | Both (A) and (R) are True and (R) correctly explains (A). |
2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
3. | Both (A) and (R) are False. |
4. | (A) is True and (R) is False. |
1. | a band where only actin molecules are found |
2. | a band where only myosin molecules are found |
3. | an attachment point for actin molecules |
4. | an attachment point for myosin molecules |