जीव विज्ञान – Zoology – Zoology MCQ
जीव विज्ञान – Zoology – CEE प्रवेश
Zoology · Medical Entrance (CEE) – Physics, Chemistry, Biology & MAT · ४०८ प्रश्न
४०८ प्रश्न उपलब्ध। मोड छान्नुहोस्:
जीव विज्ञान – Zoology: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
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The correct order of the meninges covering the brain, from outside to inside, is:
सही उत्तर: क) dura mater, arachnoid, pia mater
The tough dura mater lies outermost, the thin arachnoid in the middle and the delicate pia mater in contact with the brain tissue.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The rising phase (depolarisation) of a nerve impulse is caused mainly by the rapid:
सही उत्तर: क) entry of Na⁺ ions into the axon
A stimulus opens voltage-gated Na⁺ channels; Na⁺ rushes in and the inside becomes positive. K⁺ outflow later restores the resting potential (repolarisation).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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How many pairs of ribs in humans are 'true ribs', joined directly to the sternum by their own costal cartilage?
सही उत्तर: घ) 7
Ribs 1–7 are true ribs; ribs 8–10 are false (vertebrochondral) ribs and 11–12 are floating ribs.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Red muscle fibres, which can work for long periods, are rich in:
सही उत्तर: क) myoglobin and mitochondria
Red (slow, aerobic) fibres have plenty of the oxygen-storing red pigment myoglobin and many mitochondria; white fibres have less myoglobin and rely more on anaerobic metabolism.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Tetany, with rapid spasms (wild contractions) of muscles, is caused by:
सही उत्तर: ग) low Ca²⁺ in body fluids
Low calcium ion levels (e.g. from hypoparathyroidism) increase nerve and muscle excitability, producing tetany.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Osteoporosis, common in elderly women, is an age-related disorder characterised by:
सही उत्तर: क) decreased bone mass and increased chance of fractures
Bone mass falls (low oestrogen after menopause is a common factor), making bones brittle and fracture-prone.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The joint between the head of the humerus and the pectoral girdle (shoulder joint) is a:
सही उत्तर: ख) ball and socket joint
The rounded head of the humerus fits into the glenoid cavity, giving movement in all planes, typical of a ball and socket joint.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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During contraction of a skeletal muscle fibre, which band of the sarcomere keeps the same length?
सही उत्तर: घ) A band
The A band equals the length of the thick (myosin) filaments, which do not shorten; the I band and H zone narrow as thin filaments slide inward.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In the human nephron, nearly all essential nutrients and about 70–80% of the filtered electrolytes and water are reabsorbed in the:
सही उत्तर: घ) proximal convoluted tubule
The PCT, lined by brush-border cuboidal epithelium, carries out the bulk of reabsorption from the glomerular filtrate.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Renal calculi (kidney stones) are most commonly made of:
सही उत्तर: ख) calcium oxalate
Most kidney stones are insoluble crystallised salts, chiefly calcium oxalate, formed within the kidney.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
यी अभ्यास प्रश्न हुन्, आधिकारिक प्रश्न होइनन्। पाठ्यक्रम, विज्ञापन र नतिजाका लागि सम्बन्धित निकायको आधिकारिक वेबसाइट हेर्नुहोस्। उत्तरमा गल्ती भेटे प्रश्नमुनिको "टिप्पणी / गल्ती रिपोर्ट" मा लेख्नुहोस्।
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