कृषि, पशु र वन विज्ञान B.Sc. Forestry प्रवेश तयारी
कृषि, पशु र वन विज्ञान – B.Sc. Forestry प्रवेश
B.Sc. Forestry Entrance · Agriculture, Veterinary & Forestry Entrance
२,४९३ प्रश्न उपलब्ध। मोड छान्नुहोस्:
कृषि, पशु र वन विज्ञान 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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The organ of Corti, the actual receptor organ of hearing, is located in the:
सही उत्तर: ख) Cochlea
The organ of Corti lies on the basilar membrane of the cochlea and contains hair cells that act as auditory receptors.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The visual pigment present in the rod cells of the retina is:
सही उत्तर: क) Rhodopsin
Rods contain rhodopsin (visual purple), made of opsin and retinal, a derivative of vitamin A; cones contain iodopsin.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The resting membrane potential of a typical neuron is approximately:
सही उत्तर: ग) -70 mV
At rest the inside of the axon is about 70 mV negative relative to the outside, maintained largely by the Na+/K+ pump and K+ leak.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The enzyme renin, which starts the renin-angiotensin mechanism, is secreted by the:
सही उत्तर: घ) Juxtaglomerular cells
Juxtaglomerular cells of the afferent arteriole secrete renin when glomerular blood flow or pressure falls.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The normal glomerular filtration rate (GFR) in a healthy adult is about:
सही उत्तर: क) 125 mL per minute
About 125 mL of filtrate is formed per minute, i.e. roughly 180 litres per day, most of which is reabsorbed.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In humans, urea is synthesised from ammonia in the:
सही उत्तर: ख) Liver
Urea is formed in the liver through the ornithine (urea) cycle and is then removed by the kidneys.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Animals such as birds, reptiles and insects that excrete nitrogenous waste mainly as uric acid are called:
सही उत्तर: ग) Uricotelic
Uricotelic animals excrete uric acid, which needs very little water; this conserves water.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The hepatic portal vein carries blood from the:
सही उत्तर: घ) Intestine to the liver
The hepatic portal vein carries nutrient-rich blood from the digestive tract to the liver before it reaches systemic circulation.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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With a stroke volume of about 70 mL and a heart rate of about 72 per minute, the cardiac output of a healthy adult is approximately:
सही उत्तर: ग) 5 litres per minute
Cardiac output = stroke volume x heart rate = 70 mL x 72 ≈ 5040 mL, about 5 L per minute.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The first heart sound 'lub' is produced by the closure of the:
सही उत्तर: ख) Atrioventricular (tricuspid and bicuspid) valves
'Lub' comes from closure of the AV valves at the start of ventricular systole; 'dub' from closure of the semilunar valves.
💬 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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