MDS PREP
X-rays are generated when a stream of electrons travelling from tungsten filament is suddenly stopped by its impact on the
1. Gruntled filament
2. Anodic tungsten target
3. Cathodic tungsten target
4. Molybdenum lining of anode
Oral Pathology
Answer: 2
X-rays are generated when a stream of electrons traveling from the tungsten filament is suddenly stopped by its impact on the anodic tungsten target.
Acanthosis is
1. Increase in mitotic division
2. Increase in thickness of superficial layer
3. Increase in thickness of spinous layer
4. Disruption of basal lamina
Oral Pathology
Answer: 3
Acanthosis refers to the hyperplasia or
thickening of the stratum spinosum layer of the epidermis or epithelium. It is
often seen in conditions such as psoriasis or lichen planus. This is distinct
from other phenomena like increased mitotic division or disruption of the basal
lamina.
The deficiency of which of the following vitamins does not affect tooth development
1. Vit A
2. Vit D
3. Vit C
4. Vit K
Oral Pathology
Answer: 4
Vitamin K deficiency does not affect tooth development.
Radiation-induced thyroid cancer is the result of which type of radiation
1. Somatic
2. Genetic
3. Teratogenic
4. All of the above
Oral Pathology
Answer: 1
Radiation-induced thyroid cancer is the result of somatic radiation.
Prolonged administration of broad spectrum antibiotics results in the formation of
1. Black hairy tongue
2. Decrease exposure time
3. Geographic tongue
4. Fissured tongue
Oral Pathology
Answer: 1
Prolonged administration of broad-spectrum antibiotics can lead to black hairy tongue.
The basis of adjuvant therapy in surgery followed by chemotherapy is:
1. To make chemical agents reach centre of tumour
2. Anticancer drugs are not effective against bigger tumour therefore its size is reduced by surgery
3. Debulking the tumour by surgery makes the tumour cells re-enter the cell cycle and thus become susceptible to drug therapy
4. None of the above
Pathology
Answer: 3
Debulking the tumor by surgery makes the tumor cells re-enter the cell cycle and thus become susceptible to drug therapy: This statement is the most accurate. Surgical removal of a tumor (debulking) can indeed lead to the release of tumor cells into the circulation and may also alter the tumor microenvironment. This can make residual tumor cells more susceptible to chemotherapy, as they may re-enter the cell cycle and become more actively dividing, which is when many chemotherapy agents are most effective.
Silver tattoo is due to
1. Deposition of Ag amalgam in mucosa
2. Deposition of Ag amalgam in bone
3. Deposition of Ag amalgam in dentin
4. Deposition of Ag amalgam in enamel
Oral Pathology
Answer: 1
Silver tattoo is due to the deposition of Ag amalgam in the mucosa.
Which of the following statements about Addison's disease is correct?
1) Addison's disease is caused by excessive secretion of cortisol from the adrenal cortex.
2) Hyperpigmentation is not a classic physical finding in Addison's disease.
3) The mosaic pattern of bone is a characteristic of Addison's disease.
4) Increased incidence of astrocytomas is associated with Addison's disease.
Hyperpigmentation is a classic physical finding in Addison's disease, which is caused by adrenal insufficiency.