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 |
 63%
Level 2: 60%+
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Consider the given two statements:
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.
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:  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:
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:
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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How many of the given pairs are correctly matched:
I: Ball and socket joint Between humerus and pectoral girdle
II: Hinge joint Knee joint
III: Pivot joint Between atlas and occipital bone
IV: Gliding joint Between the carpals
V: Saddle joint Between carpal and metacarpal of thumb

1. 2
2. 3
3. 4
4. 5
 
Subtopic:  Synovial Joint |
 59%
Level 3: 35%-60%
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Which of the following statements are correct regarding skeletal muscle?
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.
Choose the most appropriate answer from the options given below:
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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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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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
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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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