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Q. No.Which of the following is correct?
1. Blood supply is absent in smooth muscles
2. In cardiac muscle fibres, sarcoplasmic reticulum is poorly developed in comparison to skeletal muscle fibres
3. Both (1) and (2)
4. ATPase enzyme required for muscle contraction is located in myosin and actin
Subtopic: Introduction to Locomotion |
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Choose the wrong statement:
1. When muscle fibre is relaxed, passive transport of Ca2+ occurs from sarcoplasm into the sarcoplasmic reticulum
2. Hyoid bone do not articulate with other bones
3. Glenoid cavity is meant for providing articulation to the head of humerus
4. Acetabulum provides articulation to the head of femur
1. When muscle fibre is relaxed, passive transport of Ca2+ occurs from sarcoplasm into the sarcoplasmic reticulum
2. Hyoid bone do not articulate with other bones
3. Glenoid cavity is meant for providing articulation to the head of humerus
4. Acetabulum provides articulation to the head of femur
Subtopic: Energy for Muscle Contraction | Muscle Contraction: Other Considerations |
69%
From NCERT
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Assertion (A): Recurrent activation of the skeletal muscles results in fatigue.
Reason (R): Aerobic breakdown of glycogen in the muscles leads to the accumulation of lactic acid
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.
Reason (R): Aerobic breakdown of glycogen in the muscles leads to the accumulation of lactic acid
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: Energy for Muscle Contraction |
64%
From NCERT
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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 |
55%
From NCERT
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Identify the incorrectly matched pair:
| 1. | Myasthenia gravis | An auto-immune disorder affecting neuromuscular junction leading to fatigue, weakening and paralysis of skeletal muscle. |
| 2. | Muscular dystrophy | Progressive degeneration of skeletal muscle mostly due to a genetic disorder. |
| 3. | Tetany | Rapid spasms (wild contractions) in muscle due to high Ca2+ in body fluid. |
| 4. | Gout | Inflammation of joints due to accumulation of uric acid crystals. |
Subtopic: Disorders of Muscular and Skeletal System |
86%
From NCERT
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Match each item in Column I with one in Column II and select the correct match from the codes given:
Codes:
| Column I | Column II | ||
| A | Gliding joint | P | Base of thumb |
| B | Saddle joint | Q | Between atlas and axis |
| C | Pivot joint | R | Suture in skull |
| D | Fibrous joint | S | Between carpal bones |
| A | B | C | D | |
| 1. | P | Q | R | S |
| 2. | Q | R | S | P |
| 3. | R | S | P | Q |
| 4. | S | P | Q | R |
Subtopic: Fibrous & Catilaginous Joints | Synovial Joint |
93%
From NCERT
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During the contraction of skeletal muscle, the length of which of the following does not get reduced?
1. A band
2. Sarcomere
3. H-zone
4. I band
1. A band
2. Sarcomere
3. H-zone
4. I band
Subtopic: Sliding Filament Theory | Muscle Contraction: Other Considerations |
88%
From NCERT
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Subtopic: Number of Bone in Appendicular Skeleton | Appendicular Skeleton |
83%
From NCERT
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What neurotransmitter is released by the anterior motor neuron at the neuro-muscular junction?
1. Dopamine
2. Norepinephrine
3. Acetylcholine
4. Adrenaline
Subtopic: Sliding Filament Theory | Muscle Contraction: Other Considerations |
95%
From NCERT
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Glenoid cavity and acetabulum are parts, respectively, of:
1. Scapula and humerus
2. Coxal bone and femur
3. Scapula and coxal bone
4. Coxal bone and scapula
Subtopic: Number of Bone in Appendicular Skeleton | Appendicular Skeleton: Upper Limb | Appendicular Skeleton |
74%
From NCERT
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