NEET MDS Shorts
39166
INI CET
Pupillary size is a critical initial observation in head injuries. Asymmetry (anisocoria) or fixed dilation provides immediate evidence of herniation or intracranial pressure shifts affecting the oculomotor nerve.
97846
Prosthodontics
Kennedy Class IV is characterized by a single
edentulous area that crosses the midline and is located anterior to the
remaining natural teeth. It is the only class that is purely anterior.
36803
RadiologyMottling is seen due to scattered radiation.
20682
Dental Materials
The material is derived from the structural formula of anhydro-?-d-mannuronic acid, which is extracted from certain types of brown seaweed.
39853
Physiology
The vagus nerve is involved in the parasympathetic control of various visceral organs, but not the eye. The oculomotor nerve (CN III) innervates the pupillary sphincter and ciliary muscle for pupil constriction and accommodation, which are parasympathetic functions.
32648
Oral Medicine
The combination of fever, vomiting, and diarrhea with seizures in a young child is more indicative of gastroenteritis, which can cause dehydration and electrolyte imbalances leading to seizures, rather than the other options listed.
90782
Oral Medicine
Glimepiride is a sulfonylurea medication that stimulates insulin secretion from pancreatic beta cells by closing ATP-sensitive potassium channels and causing depolarization, leading to calcium influx and insulin release.
10288
INI CET
Unilateral hyperinflation in a child often results from a "ball-valve" obstruction caused by a foreign body, where air can enter during inspiration but is trapped during expiration.
89882
Dental Materials
The Vickers hardness test is the most suitable for materials that exhibit
elastic recovery. The Vickers hardness test involves the use of a diamond
indenter in the form of a pyramid with a square base. The test applies a
controlled load to the specimen and measures the depth of the resulting
indentation. It is a micro-indentation hardness test, meaning it is used for
small or thin sections or for precise measurements. This test is particularly
useful for brittle materials, such as ceramics, because it creates a very small
indentation and applies a relatively low load compared to the other methods.
The other options are not as suitable for materials with elastic recovery for
the following reasons:
2. Brinell hardness test: This test uses a spherical indenter, usually a hard
steel or tungsten carbide ball, to press into the material with a significant
load. It is typically used for softer materials and is not as precise for small
indentations or for materials that are prone to plastic deformation, which may
affect the accuracy of the elastic recovery measurement.
3. Knoop hardness test: Similar to the Vickers test, the Knoop test uses a
diamond indenter but in the shape of a rhombic pyramid. Although it is also a
micro-indentation test, the Knoop indenter has a more pointed tip compared to
the Vickers pyramid. This can make it less ideal for certain materials that
exhibit elastic recovery since the sharp tip can cause more plastic deformation
and potentially damage the material.
While all three tests can be used to measure the hardness of materials, the
Vickers test is generally considered the best for materials that exhibit elastic
recovery due to its ability to produce precise and reliable results with minimal
plastic deformation.
97118
INI CET
The contemplation stage refers to when an individual is aware of the need for change and is weighing the pros and cons but is still ambivalent about taking action.