Q. No.Select the correct statement regarding the specific disorder of muscular or skeletal system.
1.
Muscular dystrophy - age-related shortening of muscles
2.
Osteoporosis- decrease in bone mass and higher chances of fractures with advancing age
3.
Myasthenia gravis- an autoimmune disorder which inhibits the sliding of myosin filaments
4.
Gout- inflammation of joints due to extra deposition of calcium
Which one of the following is the correct matching of three items and their grouping category?
| Items | Group | |
| 1. | Malleus, incus cochlea | Ear ossicles |
| 2. | Ilium, ischium, pubis | Coxal bones of pelvic girdle |
| 3. | Actin, myosin rhodopsin | Muscle proteins |
| 4. | Cytosine, uracil thiamine | pyrimidines |
In human body, which one of the following is anatomically correct?
| 1. | Floating ribs-2 pairs | 2. | Collar bones-3 pairs |
| 3. | Salivary glands-1 pair | 4. | Cranial nerves-10 pairs |
Which one of the following items gives its correct total number?
1. Floating ribs in humans - 4
2. Amino acids found in proteins - 16
3. Types of diabetes - 3
4. Cervical vertebrae in humans - 8
The contractile protein of skeletal muscle involving ATPase activity is:
| 1. | tropomyosin | 2. | myosin |
| 3. | α-actinin | 4. | troponin |
Which of the following muscular disorders is inherited?
1. Botulism
2. Tetany
3. Muscular dystrophy
4. Myasthenia gravis
Select the correct option.
| 1. | There are seven pairs of vertebrosternal, three pairs of vertebrochondral and two pairs of vertebral ribs. |
| 2. | 8th, 9th and 10th pairs of ribs articulate directly with the sternum. |
| 3. | 11th and 12th pairs of ribs are connected to the sternum with the help of hyaline cartilage. |
| 4. | Each rib is a flat thin bone and all the ribs are connected dorsally to the thoracic vertebrae and ventrally to the sternum. |
The H-zone in the skeletal muscle fibre is due to:
| 1. | The central gap between myosin filaments in the A-band. |
| 2. | The central gap between actin filaments extends through myosin filaments in the A-band. |
| 3. | Extension of myosin filaments in the central portion of the A-band |
| 4. | The absence of myofibrils in the central portion of the A-band. |
Select the correct statement with respect to locomotion in humans:
| 1. | Accumulation of uric crystals in joints causes inflammation |
| 2. | The vertebral column has 10 thoracic vertebrae |
| 3. | The joint between adjacent vertebrae is a fibrous joint |
| 4. | The decreased level of progesterone causes osteoporosis in old people |
Stimulation of a muscle fiber by a motor neuron occurs at:
1. the neuromuscular junction
2. the transverse tubules
3. the myofibril
4. the sarcoplasmic reticulum
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