आधारभूत विज्ञान (Anatomy, Physiology, Biochemistry) – Basic Sciences MCQ
आधारभूत विज्ञान (Anatomy, Physiology, Biochemistry) – MD/MS प्रवेश
Basic Sciences · MECEE-PG – MD/MS/MDS Entrance · ४३३ प्रश्न
४३३ प्रश्न उपलब्ध। मोड छान्नुहोस्:
आधारभूत विज्ञान (Anatomy, Physiology, Biochemistry): प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
-
Which component of blood plays a crucial role in oxygen transport throughout the body?
सही उत्तर: ग) C. Erythrocytes (Red Blood Cells).
Erythrocytes, or red blood cells, contain hemoglobin which binds to and transports oxygen from the lungs to tissues throughout the body. Plasma is the liquid component of blood; platelets are involved in clotting; leukocytes are immune cells.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The term ‘red herring’ in neuroanatomy refers to:
सही उत्तर: ख) B. A misleading or irrelevant stimulus that distracts from a primary response.
A ‘red herring’ is a metaphorical term used to describe a stimulus (often a sensory input) that distracts from the intended response. This is based on the historical use of red herrings in hunting as a diversionary tactic. Options B, C, and D are incorrect descriptions.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Which of the following hormones is MOST directly responsible for increasing glucose levels in the blood after a meal?
सही उत्तर: घ) D. Glucagon.
Glucagon, secreted by alpha cells of the pancreas, stimulates glycogenolysis (breakdown of stored glycogen) and gluconeogenesis (production of new glucose), leading to an increase in blood glucose levels. Insulin lowers blood glucose; thyroxine regulates metabolism generally; cortisol has widespread metabolic effects.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
The process of glomerular filtration in the kidney primarily relies on pressure differences between:
सही उत्तर: ग) C. Bowman's capsule and surrounding capillary space.
Glomerular filtration is driven by the hydrostatic pressure difference between the afferent (incoming) and efferent (outgoing) arteriole ends of the glomerular capillaries. This pressure gradient forces fluid, along with solutes, across the filtration membrane. Options A, B, and D refer to systemic or pulmonary pressures respectively.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
A patient presents with a neurological condition characterized by tremors that worsen with intentional movement (past-pointing on finger-to-nose testing). Which brain structure is most likely affected? (a) Cerebellum. (b) Basal Ganglia. (c) Cerebral Cortex. (d) Spinal Cord.
सही उत्तर: ख) (b) Basal Ganglia.
The correct answer is (a). Intention tremor, particularly one that worsens with voluntary movement like past-pointing, is a classic symptom of cerebellar dysfunction. The cerebellum plays a crucial role in coordinating movement and this type of tremor reflects impaired coordination. Options (b), (c) and (d) are either not directly involved or produce different types of tremors.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
During β-oxidation of long-chain fatty acids, which molecule facilitates the transport of these fatty acids into the mitochondrial matrix? (a) Glucose. (b) Citrate. (c) Coenzyme A (CoA). (d) ATP.
सही उत्तर: ग) (c) Coenzyme A (CoA).
The correct answer is (c). Coenzyme A (CoA) acts as an acyl group carrier, binding to the long-chain fatty acid and transporting it into the mitochondrial matrix where β-oxidation occurs. Options (a), (b) and (d) are irrelevant to this process.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Renin is a key enzyme involved in blood pressure regulation. Its secretion is stimulated by decreased renal perfusion pressure. Which of the following describes the primary function of renin? (a) Direct vasoconstriction. (b) Conversion of angiotensinogen to angiotensin I. (c) Increased glomerular filtration rate. (d) Production of red blood cells.
सही उत्तर: ख) (b) Conversion of angiotensinogen to angiotensin I.
The correct answer is (b). Renin catalyzes the first step in the renin-angiotensin system by converting angiotensinogen into angiotensin I, initiating a cascade that ultimately leads to vasoconstriction and increased blood pressure. (a), (c) and (d) are incorrect functions related to renin.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
In the context of muscle physiology, the stretch reflex is a crucial protective mechanism. Which component directly detects changes in muscle length and initiates this reflex? (a) Motor neurons. (b) Sensory receptors (e.g., muscle spindles). (c) Interneurons. (d) Cardiac muscles.
सही उत्तर: ख) (b) Sensory receptors (e.g., muscle spindles).
The correct answer is (b). Muscle spindles, which are specialized sensory receptors within skeletal muscles, detect changes in muscle length and trigger the stretch reflex arc. Options (a), (c) and (d) play roles in different aspects of movement but aren't the primary detectors of muscle length for this reflex.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
Vitamin K plays a crucial role in blood coagulation. Specifically, it’s essential for γ-carboxylation of glutamic acid residues within several clotting factors (II, VII, IX, and X). Which of the following best describes this process? (a) Phosphorylation of serine residues. (b) Glycosylation of tyrosine residues. (c) Carboxylation of glutamic acid residues. (d) Deamination of lysine residues.
सही उत्तर: घ) (d) Deamination of lysine residues.
The correct answer is (c). Vitamin K acts as a cofactor for an enzyme complex that carboxylates glutamic acid residues in clotting factors, enabling them to bind calcium and participate in the coagulation cascade. Option (a) describes phosphorylation, (b) glycosylation, and (d) deamination – these are incorrect pathways related to protein modification.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
-
A patient exhibits a positive Kernig's sign, indicating potential neurological involvement. What does this finding most directly suggest?
सही उत्तर: क) Increased cerebrospinal fluid pressure
The Kernig’s sign (pain elicited with dorsiflexion of the foot while hip is flexed) is a clinical test used to assess meningeal irritation or inflammation. An increased cerebrospinal fluid pressure is a key component that drives this positive sign.
💬 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।
नमस्ते! पाठ्यक्रम, सामान्य ज्ञान, भाषा परीक्षा वा कुनै प्रश्नको उत्तर बुझ्न सोध्नुहोस्।
AI ले गल्ती गर्न सक्छ। महत्वपूर्ण कुरा आधिकारिक स्रोतमा जाँच्नुहोस्।