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
Subtopic:  Muscle Contraction: Other Considerations |
 85%
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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
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
Choose the correct answer from the options given below:
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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What is the total number of phalanges in the human body?
1. 14 2. 28
3. 56 4. 7
Subtopic:  Appendicular Skeleton |
 68%
From NCERT
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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 
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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