NEET MDS Shorts
81624
NEETMDS
The sequence typically starts with maxillary incisors, followed by maxillary molars, mandibular molars, and finally mandibular incisors due to feeding patterns and oral anatomy.
53585
ProsthodonticsA middle-aged patient gives a history of previous upper dentures remade many times as they are becoming tight within one year. You would suspect osteitis deformans.
17213
Oral SurgeryFor an 8-year-old child with TMJ ankylosis, the treatment of choice is gap arthroplasty with costochondral grafting.
43715
Physiology
The decreased CO2 concentration in the airways can cause bronchoconstriction,
which is the constriction of the airways. This is the correct answer among the
options provided. Here is the detailed explanation:
CO2 (carbon dioxide) is an important regulator of bronchial tone. It acts
primarily through the chemoreceptors located in the carotid body and the
medullary centers of the brain, which respond to changes in the partial pressure
of CO2 in the arterial blood (PaCO2). When the concentration of CO2 in the
airways decreases, it leads to a reduction in the PaCO2. This drop in PaCO2 is
detected by the central nervous system, which then responds to maintain
homeostasis.
The body normally adjusts the diameter of the airways to ensure proper gas
exchange and ventilation. When PaCO2 levels decrease, the respiratory center in
the brain perceives this as an increase in pH (alkalosis), which can be
detrimental to the body's overall homeostasis. To counteract this, the
respiratory center initiates a reflex that can lead to bronchoconstriction. This
reflex is known as the Hering-Breuer reflex. The vagus nerve, which innervates
the airway smooth muscles, is activated by the increase in pH, causing the
release of acetylcholine and other bronchoconstrictive substances. This, in
turn, results in the contraction of the smooth muscles surrounding the
bronchioles, leading to a narrowing of the airway diameter.
Therefore, the correct answer is 2. Constriction of airways.
This response is essential in the regulation of respiration and maintaining the
optimal pH balance in the body. It is part of the body's complex system to
ensure that oxygen and carbon dioxide are properly exchanged in the lungs and
that the blood remains at a slightly alkaline pH level. However, in individuals
with certain respiratory conditions such as asthma or chronic obstructive
pulmonary disease (COPD), bronchoconstriction can exacerbate their symptoms and
potentially lead to respiratory distress.
30129
Dental Materials
Compomers are known for their ease of use, being non-sticky, and simple to place and shape. They are a hybrid of glass ionomer and composite resin properties, offering good aesthetics and user-friendly handling.
75828
General Medicine
The combination of confusion, tremors, and elevated serum ammonia levels in the setting of alcoholism suggests hepatic encephalopathy, which can occur due to liver dysfunction.
36979
INI CET
Scratches on an intensifying screen block the light from reaching the film in that specific area during exposure. This results in an under-exposed area on the radiograph, which appears as a light spot.
97338
Dental MaterialsIncreasing the powder to liquid ratio in a zinc phosphate cement will decrease the set time and increase the strength
38872
NEETMDS
A vasoselective drug is one that primarily affects blood vessels.
The options provided are mostly anticholinergic drugs:Ipratropium bromide is an
anticholinergic bronchodilator used for respiratory conditions.
Cyclopentolate is an anticholinergic used in ophthalmology to dilate pupils.
Tolterodine is an anticholinergic used for overactive bladder, working on
muscarinic receptors in the bladder muscle.
Adrenaline (epinephrine) is a non-selective adrenoceptor agonist with broad
effects on the heart, lungs, and blood vessels.
40041
BiochemistryThe reaction used for estimating free amino, groups in proteins is Deamination with HNO2