NEET MDS Shorts
35081
Radiology
Objects which cause attenuation of X-ray beam are shown as radiopaque in an
image.
Radiopaque materials absorb or block X-rays, leading to a reduced transmission
of the X-ray beam. This results in the appearance of white areas or shadows on
the X-ray image, indicating the presence of dense structures like bone, metal
restorations, or calculi. Radiolucent structures, on the other hand, allow
X-rays to pass through more freely, resulting in dark areas on the image.
63896
PedodonticsPostural position does not affect occlusal adjustment.
59338
INI CET
The trigeminovagal reflex is a parasympathetic response typically causing bradycardia and hypotension. Hypertension (high blood pressure) is not a feature of this reflex.
10452
State PSC PYQSyncope is typically caused by a temporary reduction in blood flow to the brain (cerebral ischemia). The immediate management involves positioning the patient to help blood flow back to the head. Placing the patient in a supine (lying flat on their back) position with their legs elevated uses gravity to increase venous return to the heart and thus blood flow to the brain. This is the crucial first step before considering other interventions like administering oxygen or calling emergency services.
31821
EndodonticsIn primary teeth, intrusion is common because alveolar bone is pliable. Primary teeth characteristics that predispose to intrusion: 1) The alveolar bone around primary teeth is more cancellous and flexible, 2) This pliable bone allows the tooth to be pushed deeper into the socket rather than being displaced laterally or avulsed, 3) The root structure of primary teeth also contributes to this pattern. While vertical overlap and lip protection may influence injury patterns, the primary factor is the pliable nature of the developing alveolar bone in children.
20637
EndodonticsThe primary cause of weakening in an endodontically treated tooth is the loss of sound tooth structure during the access cavity preparation and subsequent canal instrumentation. The extent of this preparation, particularly the removal of marginal ridges and cusps, significantly compromises the tooth's structural integrity.
72127
General MedicineKaussmaul's breathing is due to the presence of H+ ions
65066
MedicineNRTIs (e.g., Tenofovir, Emtricitabine) work by mimicking natural nucleosides and terminating the growing DNA chain during the reverse transcription process, which is the mechanism by which HIV converts its RNA genome into DNA. Other classes like PIs inhibit viral protein maturation, INSTIs block viral DNA integration into the host genome, and NNRTIs also block reverse transcriptase but via a different mechanism.
33725
Orthodontics
SOLUTION The type of welding used to join Orthodontic components is called Spot welding. The heat source usually a high amperage electricity. Orthodontic spot welders employ the electrode technique, in which current is conducted through two copper electrodes. The copper electrode in a welding unit serve the following purposes : 1. Transmit current to the metals to be joined so as to cause a rapid increase in temperature.
2. The electrodes help in conducting the heat produced away from the area so as to preserve the properties of stainless steel around the weld spot.
3. The electrode also help in holding together the two metals to be joined.
4. The electrodes are designed to apply pressure on the metals being joined. As soon as the temperature increases, the pressure exerted by the electrodes helps in squeezing metal into each other.
94189
PharmacologyAmpicillin is the antibiotic of choice for acute epiglottitis based on culture sensitivity.