(a) | In humans, the skull articulates with the axis vertebra with two occipital condyles. |
(b) | The number of cervical vertebrae is seven in almost all mammals. |
(c) | The bones of vertebral column form the cartilaginous joint. |
(d) | The spinal curve formed due to thoracic vertebrae is convex anteriorly. |
Statement A: | First seven pairs of ribs are ventrally connected to the sternum with the help of hyaline cartilage. |
Statement B: | The last three pairs of ribs do not articulate directly with the sternum but join the seventh rib with the help of hyaline cartilage. |
Column I | Column II | ||
(a) | Pivot joint | (i) | Between atlas and axis |
(b) | Gliding joint | (ii) | Between the carpals |
(c) | Ball and socket joint | (iii) | Knee joint |
(d) | Saddle joint | (iv) | Between humerus and pectoral girdle |
(v) | Between carpal and metacarpal of thumb |
(a) | Binding of calcium with the subunit of tropomyosin removes the masking of active sites for myosin |
(b) | Z-lines move towards the centre of ‘H’ zone |
(c) | Cross bridge is formed by utilising the energy from hydrolysis of ATP |
(d) | H-zone disappears when a muscle fibre is maximally contracted |