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Q. No.A motor neuron along with the muscle fibres connected to it constitutes a:
1.
Neuro-muscular junction
2.
Motor end plate
3.
Sarcomere
4.
Motor unit
Subtopic: Muscle Contraction: Other Considerations |
59%
Level 3: 35%-60%
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Which of the following statements are correct regarding skeletal muscle?
Choose the most appropriate answer from the options given below:
| A: | Muscle bundles are held together by collagenous connective tissue layer called fascicle. |
| B: | Sarcoplasmic reticulum of muscle fibre is a store house of calcium ions. |
| C: | Striated appearance of skeletal muscle fibre is due to distribution pattern of actin and myosin proteins. |
| D: | M line is considered as functional unit of contraction called sarcomere. |
| 1. | C and D only | 2. | A, B and C only |
| 3. | B and C only | 4. | A, C and D only |
Subtopic: Skeletal Muscle: Basic Anatomy | Skeletal Muscle: Myofilaments | Skeletal Muscle: Sarcomere |
56%
Level 3: 35%-60%
NEET - 2023
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Given below are two statements:
| Assertion (A): | Electrical excitability is a property of nervous tissue but not of muscular tissue. |
| Reason (R): | The ability to respond to internal and external stimuli is lacking in muscular tissue. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Muscle |
62%
Level 2: 60%+
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Select the correct statement with respect to disorders of muscles in humans.
| 1. | Failure of neuromuscular transmission in myasthenia gravis can prevent normal swallowing |
| 2. | Accumulation of urea and creatine in the joints causes their inflammation |
| 3. | An overdose of vitamin D causes osteoporosis |
| 4. | Rapid contractions of skeletal muscles causes muscle dystrophy |
Subtopic: Disorders of Muscular and Skeletal System |
Level 3: 35%-60%
NEET - 2013
Hints
Select the incorrect matching of three items and their grouping category
| 1. | IIeum, ischium pubis - Form coxal bones of pelvic girdle |
| 2. | Actin, myosin, troponin - Muscle proteins |
| 3. | Malleus, incus, stapes - Ear osicles |
| 4. | Hyoid, zygomatic, sphenoid - Skull bones |
Subtopic: Appendicular Skeleton: Girdle |
Level 3: 35%-60%
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Consider the statements given below and choose the option that correctly states them as true (T) or false (F)
| (a) | Locomotion, changes of body postures and heat production are some of the functions of skeletal muscle tissue |
| (b) | Actin filaments are firmly attached to the Z-line |
| (c) | The portion of myofibril between non-consecutive 'Z' lines is called sacromere |
| (d) | Muscles constitute more than 50% of the body weight in an adult human |
| a | b | c | d | |
| 1. | T | T | T | T |
| 2. | T | F | F | T |
| 3. | T | T | F | F |
| 4. | F | T | T | T |
Subtopic: Introduction to Locomotion | Skeletal Muscle: Basic Anatomy | Skeletal Muscle: Sarcomere |
59%
Level 3: 35%-60%
Hints
Consider the given two statements:
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
| Statement I: | A single filament of tropomyosin runs close to the ‘F’ actins throughout its length. |
| Statement II: | In the resting state, a subunit of troponin masks the active binding sites for myosin on the actin filaments. |
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Skeletal Muscle: Myofilaments |
50%
Level 3: 35%-60%
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Calcium released into the sarcoplasm during muscle contraction:
| 1. | binds to the actin and myosin and makes them work together. |
| 2. | breaks apart ATP to ADP and P. |
| 3. | removes the tropomyosin block. |
| 4. | causes the release of acetylcholine. |
Subtopic: Sliding Filament Theory |
62%
Level 2: 60%+
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Consider the given two statements regarding the cycle of events taking place during skeletal muscle contraction:
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
| Statement I: | The myosin, hydrolysing ATP into ADP and Pi goes back to its relaxed state. |
| Statement II: | Cross bridge is broken when myosin releases ADP and Pi. |
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Sliding Filament Theory | Energy for Muscle Contraction |
Level 4: Below 35%
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Consider the two statements:
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
| Statement I: | First seven pairs of the ribs are called true ribs and are attached to the thoracic vertebrae and ventrally connected to the sternum with the help of elastic cartilage. |
| Statement II: | The 8th, 9th and 10th pairs are false ribs and join the seventh rib with the help of elastic cartilage. |
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Sternum & Ribs |
63%
Level 2: 60%+
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