Q. No.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
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.
| 1. | Neuro-muscular junction |
| 2. | Motor end plate |
| 3. | Sarcomere |
| 4. | Motor unit |
| 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. |
| 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 |
1. A band
2. Sarcomere
3. H-zone
4. I band
What neurotransmitter is released by the anterior motor neuron at the neuro-muscular junction?
1. Dopamine
2. Norepinephrine
3. Acetylcholine
4. Adrenaline
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
Consider the given two statements:
Assertion: During shortening of the muscle, i.e., contraction, the ‘A’ bands get reduced, whereas the ‘I’ bands retain the length.
Reason: Contraction of a muscle fibre takes place by the sliding of the thin filaments over the thick filaments.
1. Both Assertion and Reason are false
2. Both Assertion and Reason are true and the Reason correctly explains the Assertion
3. Both Assertion and Reason are true but the Reason does not correctly explain the Assertion
4. Assertion is false but Reason is true
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