चिकित्सा स्नातकोत्तर प्रवेश (MECEE-PG) MD / MS / MDS प्रवेश परीक्षा तयारी
चिकित्सा स्नातकोत्तर प्रवेश (MECEE-PG) – MD / MS / MDS प्रवेश परीक्षा
MECEE-PG – MD/MS/MDS · MECEE-PG (MD/MS/MDS)
२,८६५ प्रश्न उपलब्ध। मोड छान्नुहोस्:
MD/MS/MDS प्रवेश: 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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In scurvy, defective collagen results from impaired:
सही उत्तर: क) Hydroxylation of proline and lysine residues
Vitamin C is a cofactor for prolyl and lysyl hydroxylases; without hydroxylation the triple helix is unstable, causing bleeding gums and poor wound healing. Lysyl oxidase needs copper, not vitamin C.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A person has a blood pressure of 120/80 mmHg. The approximate mean arterial pressure is:
सही उत्तर: घ) 93 mmHg
MAP ≈ diastolic pressure + one-third of pulse pressure = 80 + (40/3) ≈ 93 mmHg. It is not the simple average (100 mmHg) because the heart spends longer in diastole than in systole at rest.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Prothrombin time (PT) is most sensitive to deficiency of which clotting factor?
सही उत्तर: ख) Factor VII
PT tests the extrinsic (factor VII) and common pathways; factor VII has the shortest half-life, so PT rises early in warfarin therapy and liver disease. Deficiencies of factors VIII, IX and XII prolong the aPTT instead.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The normal lifespan of a red blood cell in circulation is about:
सही उत्तर: घ) 120 days
Mature RBCs survive about 120 days and are then removed mainly by macrophages of the spleen. Platelets, in contrast, survive about 7–10 days.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Alpha waves on EEG (8–13 Hz) are typically recorded in a person who is:
सही उत्तर: घ) Awake and relaxed with eyes closed
Alpha rhythm is most prominent over the occipital region in a relaxed, awake subject with eyes closed and disappears on eye opening (alpha block), being replaced by beta waves. Deep sleep is characterised by slow delta waves.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An intention tremor with past-pointing on finger–nose testing suggests a lesion of the:
सही उत्तर: ख) Cerebellum
Cerebellar lesions cause intention tremor, dysmetria, dysdiadochokinesia and ataxia, ipsilateral to the lesion. Basal ganglia disease such as Parkinsonism typically causes a resting tremor.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Pain and temperature sensations from the body are carried to the thalamus by the:
सही उत्तर: ख) Lateral spinothalamic tract
The lateral spinothalamic tract carries pain and temperature; its fibres cross within one or two segments of entry. Fine touch, vibration and proprioception ascend in the dorsal columns and cross in the medulla.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The sensory receptor responsible for the stretch (myotatic) reflex is the:
सही उत्तर: क) Muscle spindle
Muscle spindles detect changes in muscle length and, via Ia afferents, monosynaptically excite alpha motor neurons of the same muscle (e.g. knee jerk). Golgi tendon organs sense tension and mediate the inverse stretch reflex.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Slow, poorly localised, burning pain is carried mainly by:
सही उत्तर: क) C fibres
Unmyelinated C fibres conduct slowly and carry dull, burning, poorly localised pain. Thinly myelinated A-delta fibres carry fast, sharp, well-localised pain.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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During skeletal muscle contraction, which band of the sarcomere remains constant in length?
सही उत्तर: क) A band
The A band corresponds to the full length of the thick (myosin) filaments, which do not shorten. According to the sliding filament theory, the I band and H zone narrow and the Z lines move closer together.
💬 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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