Q. No.If a stimulus, several times greater than the threshold stimulus, is provided to a muscle fiber, it will
1. Contract with a larger force
2. Contract with a smaller force
3. Contract with the same force
4. Undergo tetany
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 rid is a flat thin bone and all the ribs are connected dorsally to the thoracic vertebrae and ventrally to the sternum.
Match the following columns and select the correct option.
| Column-I | Column-II | ||
| (a) | Floating Ribs | (i) | Located between second and seventh ribs |
| (b) | Acromion | (ii) | Head of the humerus |
| (c) | Scapula | (iii) | Clavicle |
| (d) | Glenoid cavity | (iv) | Do not connect with the sternum |
| (a) | (b) | (c) | (d) | |
| 1. | (i) | (iii) | (ii) | (iv) |
| 2. | (iii) | (ii) | (iv) | (i) |
| 3. | (iv) | (iii) | (i) | (ii) |
| 4. | (ii) | (iv) | (i) | (iii) |
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 description of a certain part of a normal human skeleton?
1. First vertebra is axis which articulates with the occipital condyles
2. The 9th and 10th pairs of ribs are called the floating ribs
3. Glenoid cavity is a depression with which the thigh bone articulates
4. Parietal bone and the temporal bone of the skull are joined by a fibrous joint
It is much easier for a small animal to run uphill than for a large animal, because
1. It is easier to carry a small body weight
2. Smaller animals have a higher metabolic rate
3. Small animals have a lower O2 requirement
4. The efficiency of muscles in large animals is less than in the small animals
Name the ion responsible for the unmasking of active sites for myosin for cross-bridge activity during muscle contraction.
| 1. | Calcium | 2. | Magnesium |
| 3. | Sodium | 4. | Potassium |
Skeletal muscles appear striated due to presence of two characteristic proteins in alternating dark and light bands. Which of the following is a correct match of the protein with its light refractive property and colour?
| Protein | Colour | Property | |
| 1. | Myosin | Light | Anisotropic |
| 2. | Actin | Dark | Anisotropic |
| 3. | Myosin | Dark | Isotropic |
| 4. | Actin | Light | Isotropic |
Calcium is important in skeletal muscle contraction because it
| 1. | Detaches the myosin head from the actin filament |
| 2. | Activates the myosin ATPase by binding on it |
| 3. | Binds to troponin to remove the masking of active sites on actin for myosin |
| 4. | Prevents the formation of bonds between the myosin cross bridges and the actin filament |
Three of the following pairs of the human skeletal parts are correctly matched with their respective inclusive skeletal category and one pair is not matched. Identify the non-matching pair.
| Pairs of skeletal parts | Category | |
| 1. | Malleus and stapes | Ear ossicles |
| 2. | Sternum and ribs | Axial skeleton |
| 3. | Clavicle and glenoid cavity | Pelvic girdle |
| 4. | Humerus and ulna | Appendicular skeleton |
© 2025 GoodEd Technologies Pvt. Ltd.