NEET MDS Shorts
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NEETMDS
Streptococci contribute to caries development primarily because they ferment carbohydrates, producing acid as a metabolic byproduct which demineralizes tooth enamel.
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General MicrobiologyAntibodies neutralize exotoxins by binding to their protein components, preventing them from interacting with host cells and causing damage. This immune response is critical for protecting the host from the harmful effects of these toxins.
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Conservative DentistryPorcelain restorations are known for their superior esthetics, primarily due to their ability to mimic the natural color, translucency, and harmony of natural teeth, which is a significant advantage over other tooth-colored restorations like composite resins.
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Physiology
Answer: 2) Secretion of epinephrine and norepinephrine
Explanation: The Adrenal Medulla is part of the sympathetic nervous system and produces the hormones epinephrine (adrenaline) and norepinephrine (noradrenaline) in response to stress or danger. These hormones are crucial for the fight-or-flight response, which prepares the body for immediate action by increasing heart rate, blood pressure, and diverting blood flow to the muscles and brain.
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NEETMDS
The center of resistance is the point where a single force can be applied to cause pure translation (bodily movement) of the tooth without any rotation or tipping.
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Community DentistryFluoride is absorbed in the gastrointestinal tract and is distributed throughout the body. A significant portion of ingested fluoride is excreted through urine. However, fluoride also accumulates in skeletal tissues, including bones and teeth, where it can contribute to the mineralization process and enhance resistance to dental caries. The skeletal system retains fluoride, which can be beneficial in small amounts but may lead to toxicity if excessive.
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Dental Materials
The text does not provide specifics on luting agent requirements in terms of compressive strength and setting time.
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PhysiologySpermatogenesis occurs in the seminiferous tubules of the male reproductive system, where sperm cells are produced and matured.
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NEETMDS
The optimal concentration for community water fluoridation is generally about 0.7 to 1.2 ppm. Among the given options, 1.0 ppm (Option C) is the most accurate standard value.
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RadiologyGrid is used in radiography to reduce fogging.