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Q. No.Which of the following regions within a sarcomere remain UNCHANGED in length when a healthy human muscle cell contracts?
(i) A-band
(ii) I-band
(ii) H-zone / band
1. 2 only
2. 3 only
3. 2 and 3 only
4. 1 only
(i) A-band
(ii) I-band
(ii) H-zone / band
1. 2 only
2. 3 only
3. 2 and 3 only
4. 1 only
Subtopic: Muscle Contraction: Other Considerations |
85%
From NCERT
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Calcium ions are released from the sarcoplasmic reticulum. What happens next?
| 1. | acetylcholine is released |
| 2. | active sites on the actin filaments are exposed |
| 3. | filaments slide past one another, and the muscle fiber shortens |
| 4. | myosin is activated |
Subtopic: Sliding Filament Theory |
82%
From NCERT
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Glenoid cavity articulates:
| 1. | clavicle with acromion | 2. | scapula with acromion |
| 3. | clavicle with scapula | 4. | humerus with scapula |
Subtopic: Appendicular Skeleton: Girdle |
64%
From NCERT
NEET - 2015
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Match List I with List II
Choose the correct answer from the options given below:
| List I (Type of Joint) | List II (Found between) | ||
| A. | Cartilaginous Joint | I. | Between flat skull bones |
| B. | Ball and Socket Joint | II. | Between adjacent vertebrae in vertebral column |
| C. | Fibrous Joint | III. | Between carpal and metacarpal of thumb |
| D. | Saddle Joint | IV. | Between Humerus and Pectoral girdle |
| Options: | A | B | C | D |
| 1. | II | IV | III | I |
| 2. | III | I | II | IV |
| 3. | II | IV | I | III |
| 4. | I | IV | III | II |
Subtopic: Fibrous & Catilaginous Joints | Synovial Joint |
87%
From NCERT
NEET - 2023
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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
Subtopic: Muscle Contraction: Other Considerations |
92%
From NCERT
AIPMT - 2014
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Subtopic: Appendicular Skeleton |
68%
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Osteoporosis, an age-related disease of skeletal system, may occur due to:
| 1. | junction leading to fatigue |
| 2. | high concentration of ca++ and Na+ |
| 3. | decreased level of oestrogen |
| 4. | accumulation of uric acid leading to inflammation of joints |
Subtopic: Disorders of Muscular and Skeletal System |
92%
From NCERT
NEET - 2016
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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. |
Subtopic: Sternum & Ribs |
68%
From NCERT
NEET - 2019
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Which of the following is present between the adjacent bones of the vertebral column?
1. Smooth muscle
2. Intercalated discs
3. Cartilage
4. Areolar tissue
1. Smooth muscle
2. Intercalated discs
3. Cartilage
4. Areolar tissue
Subtopic: Fibrous & Catilaginous Joints |
69%
From NCERT
NEET - 2022
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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
Subtopic: Human Skeleton: Introduction, Function, Parts |
71%
From NCERT
NEET - 2015
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