Q. No.Which of the following is not a function of the skeletal system?
1. Production of erythrocytes
2. Storage of minerals
3. Production of body heat
4. Locomotion
| A. | It is initiated by a signal sent by CNS via sensory neuron. |
| B. | Neurotransmitter generates action potential in the sarcolemma. |
| C. | Increased Ca++ level leads to the binding of calcium with troponin actin filaments. |
| D. | Masking of active site for actin is activated. |
| E. | Utilising the energy from ATP hydrolysis to form cross bridge. |
1. B, C and E only
2. C, D and E only
3. A and D only
4. B, D and E only
Name of muscle/location
| 1. | (a) Skeletal - Triceps (b) Smooth - Stomach (c) Cardiac - Heart |
2. | (a) Skeletal - Biceps (b) Involuntary - Intestine (c) Smooth - Heart |
| 3. | (a) Involuntary - Nose tip (b) Skeletal - Bone (c) Cardiac - Heart |
4. | (a) Smooth - Toes (b) Skeletal - Legs (c) Cardiac - Heart |
During muscular contraction, which of the following events occur?
| (a) | 'H' zone disappears |
| (b) | 'A' band widens |
| (c) | 'I' band reduces in width |
| (d) | Myosin hydrolyzes ATP, releasing the ADP and Pi |
| (e) | Z-lines attached to actins are pulled inwards |
Choose the correct answer from the options given below:
1. (b), (c), (d) and (e) only
2. (b), (d), (e) and (a) only
3. (a), (c), (d) and (e) only
4. (a), (b), (c) and (d) only
Name the ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction:
| 1. | Calcium | 2. | Magnesium |
| 3. | Sodium | 4. | Potassium |
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
| 1. | Sarcomere does not shorten | 2. | A band remains the same |
| 3. | A, H and I bands shorten | 4. | Actin filaments shorten |
Which one of the following pairs of chemical substances, is correctly categorised?
| 1. | Pepsin and prolactin - Two digestive enzymes secreted in the stomach |
| 2. | Troponin and myosin - Complex proteins in striated muscles |
| 3. | Secretin and rhodopsin - Polypeptide hormones |
| 4. | Calcitonin and thymosin - Thyroid hormones |
| 1. | Smooth muscle | 2. | Intercalated discs |
| 3. | Cartilage | 4. | Areolar tissue |
Out of ‘X’ pairs of ribs in humans only 'Y' pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation:
| 1. | X=12, Y=5 True ribs are attached to vertebral column and sternum on the two ends. |
| 2. | X=24, Y=7 True ribs are dorsally attached to vertebral column but are free on ventral side. |
| 3. | X=24, Y=12 True ribs are dorsally attached to vertebral column but are free on ventral side. |
| 4. | X=12, Y=7 True ribs are attached dorsally to vertebral column and ventrally to the sternum. |
© 2026 GoodEd Technologies Pvt. Ltd.