NEET MDS Shorts
83560
PhysiologyCalbindin sequesters calcium within the intestinal epithelial cells to prevent it from interfering with calcium-dependent signaling processes, thereby facilitating efficient calcium absorption without disrupting normal cellular function.
76872
Oral Surgery
Severe acidosis, particularly metabolic acidosis, can occur following
prolonged cardiac arrest and subsequent CPR. The primary goal in managing such
cases is to restore normal pH levels in the body, which is crucial for proper
cellular function and overall physiological homeostasis. 1. Sodium bicarbonate Sodium bicarbonate is a strong base that reacts with
hydrogen ions (H+), which are responsible for acidity in the blood, to form
carbon dioxide (CO2) and water (H2O). This reaction helps to neutralize the
excess hydrogen ions, thereby raising the pH of the blood. It is administered
intravenously because it allows for rapid distribution throughout the body and
direct access to the circulatory system where it can counteract acidosis most
effectively. The intravenous route ensures that the medication reaches the
bloodstream quickly and in a controlled manner, making it the preferred method
for acute and severe cases.
2. Adrenaline (epinephrine)*: Although adrenaline is a crucial medication used
in CPR for its vasopressor and cardiac stimulant effects, it is not the primary
treatment for severe acidosis. Adrenaline is typically administered to improve
cardiac output and blood pressure during CPR.
24956
OrthodonticsThe high labial-bow is typically used for molar retraction and is not designed for incisor retraction. In contrast, Roberts retractors, split labial-bows, and apron springs are all instruments that can be used effectively for retracting incisors during orthodontic treatment.
56501
NEETMDSThe orbicularis oris muscle is a sphincter muscle that encircles the mouth and is responsible for closing the lips, pouting, and whistling. Paralysis of this muscle, typically due to facial nerve injury, would result in the inability to close the lips completely.
35209
Physiology
The rate of gastric emptying is influenced by the presence of food in the stomach, the type of food (carbohydrates, proteins, and fats), the distension of the duodenum, and the hormone gastrin, which can increase the rate of emptying.
99599
INI CET
Ellis class 3 refers to a complicated crown fracture with pulp exposure. For a vital pulp exposure in a young patient (7 years old) with an open apex, a Cvek partial pulpotomy (shallow pulpotomy) is the preferred treatment if the exposure is recent (within 24 hours) and the pulp is vital.
62613
EndodonticsHydroxylation of protocollagen to true collagen in wound healing requires all three factors: 1) Oxygen - provides the oxidizing environment necessary for the hydroxylation reaction, 2) Ferric ion (Fe3+) - acts as a cofactor for the enzyme prolyl hydroxylase, 3) Ascorbic acid (Vitamin C) - essential cofactor that maintains iron in the ferrous state and is required for prolyl and lysyl hydroxylase activity. Deficiency of any of these factors leads to defective collagen synthesis, resulting in poor wound healing and scurvy-like symptoms.
84607
Oral PathologyAll these conditions contain multinucleated giant cells histologically.
83495
RadiologyTo discriminate objects with small density differences like CSF and blood, the radiographic technique used is CT scan.
42470
Dental Materials
Resilience is the amount of energy absorbed by a structure when it is stressed to proportional Limit.
The elastic area of the stress-strain graph gives resilience; entire area up to breaking point is a measure of toughness.
The slope of straight Line gives Young’s modulus.