MDS PREP
The most common site for CSF rhinorrhea
1. frontal bone
2. ethmoid bone
3. tegmen tympani
4. none
Anatomy
Answer: 2
Cerebrospinal fluid (CSF) rhinorrhea occurs when there is a leak of CSF through the nasal cavity, often due to a defect in the skull base. The ethmoid bone is the most common site for such leaks because of its thin structure and proximity to the nasal cavity.
Immediately following the closure of the A-V valves is the period of
1. Isotonic contraction
2. Isometric contraction
3. Isometric relaxation
4. Isotonic relaxation
Anatomy
Answer: 3
Immediately following the closure of the A-V valves is the period of
Isometric relaxation
The smallest and most inaccessible root canal-in the maxillary second molar is the
1. faciolingual
2. mesiobuccal
3. lingual
4. distobuccal
Dental Anatomy
Answer: 4
The smallest and most inaccessible root canal-in the maxillary second molar is the distobuccal
When calcospherites fail to fuse during calcification of dentin matrix then
1 Interglobular dentin is formed
2 Dead tracts are found in formed dentin
3 Irregular dentin results
4 None
Dental Anatomy
Answer: 1
Sometimes, mineralization of dentin begins in small globular areas that fail to coalesce into a homogenous mass. This results in zones of hypomineralization between the globules.
These zones are known as globular dentin or interglobular spaces. Thus, demonstrating defect of mineralization and not of matrix formation, the dentinal tubules pass uninterruptedly through interglobular dentin.
In an average child the mixed dentition period is from
1. 10 years to 25 years
2. 4 yrs to 12 yrs
3. 8 yrs to 17 yrs
4. 6 yrs to 13 years
Dental Anatomy
Answer: 4
In an average child the mixed dentition period is from 6 yrs to 13 y
The fibres of Purkinje?
1. Are remains of embryonic cardiac muscle fibres
2. Are placed over the pericardium
3. Arise from the sinu-arterial noded a and b both
4. a and b both
Anatomy Answer: 1
These form specialized fibres of the heart and are supposed to be terminal filaments of bundle of His. They are placed beneath the endocardium and intervene between it and the myocardium.
The first teeth to erupt in the dental arches of the human being are the, primary
1. mandibular cuspids
2. maxillary central incisors.
3. mandibular central incisors
4. maxillary first molars
Dental Anatomy
Answer: 3
The first teeth to erupt in the dental arches of the human being are the, primary mandibular central incisors
The trigeminal ganglion lies on
1 Anterior temporal bone near its apex hi Meckel’s cave, which is a depression in the bone
2. Posterior surface of petrous temporal bone near Its apex in -Meckel’s cave. which is a depression In the bone
3. Anterior surface of petrous temporal bone near its apex in Meckel’s cave which is a space of dura mater
4. Petrous temporal bone in posterior cranial fossa
Anatomy
Answer: 3
The trigeminal ganglion lies on Anterior surface of petrous temporal bone near its apex in Meckel’s cave which is a space of dura mater