Крок 1 stom. по темам1

A histological specimen presenting a tooth slice shows that the intercellular dentin substance contains collagen fibers being tangential to the dentinoenamel junction and perpendicular to the dentinal tubules (Ebner's fibers). This dentin layer is called:

ANearpulp dentin*

BMantle dentin

CGranular layer

DInterglobular dentin

ESecondary dentin

Histological examination of trasverse enamel slice revealed linear banding in form of concentric circles that is pointing at an angle to the dentinoenamel junction. Name these structures:

ARetsius' lines*

BHunter-Schreger's lines

CEnamel plates

DEnamel fascicles

EEnamel spindles

It was revealed that a 42 y.o. patient suffering from paradontosis had roundish calcified formations 2-3 mm in diameter in the coronal pulp. Name these structures:

ADenticles*

BInterglobular spaces

CSclerotic dentin

DDead dentin

EIntertubular dentin

Examination of a tooth slice of a 42 y.o. man revealed on the dentinal-enamel border some solid inear fusiform structures as long as 1/3 of enamel depth. What structures were revealed?

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AEnamel spindles*

BDenticles

CEnamel fascicles

D"Dead" tracts

ECarious damage

A histological specimen presents a developed tooth that has a coating resistant to acids, but it can be found only on the lateral surfaces of the tooth. What coating is meant?

ACuticle*

BDentine

CEnamel pellicle

DEnamel

ECement

In a peripheral zone of the pulp for the certain reasons activity of cells is temporarily delayed. What tissue of the tooth appears under threat of infringement of physiological regeneration?

A.Enamelum

B.Dentine *

C. Pulp

D.Cellular cementum E. Ancellular cementum

In two preparations of a tooth histological it is determined: in one - uncellular cementum, in the second - cellular. The second preparation is made of what site of a tooth?

A.From the apex of the root *

B.From the cervix of the tooth

C.From the bone

D.From crown of the tooth

E.From a site of border between crown and the root

In nearpulp dentine of the tooth of the adult person sites with the disorder accommodation of dentinal tubules and collagenic fibers are determined. Named the given kind of dentine.

A.Secondary (regular).

B.Primary

C.Tertiary (irregular) *

D.Sclerotic

E.Dead ways

The child complains of a toothache. The doctor - stomatologist ascertained caries damage of enamel. What quantity amount of mineral substances is reduced in a site of caries damages?

A.Phosphorus, fluorine, calcium *

B.Sodium, calcium, kalium

C.Кalium, phosphorus, fluorine

D.Magnesium, fluorine, calcium

E.Phosphorus, magnesium, kalium

At studying of tooth’s slice of the human of 40 years in a site of the root the transparent zone in which are have now dental tubules is determined. What age changes of dentine are observed on slice?

A.Formation of sclerotic dentine*

B.Formation of denticles

C.Condensation of dentine

D.Formation of dead ways

E.Caries damage

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D.Tangential collagenic fibers

E.Nervous

On a histological preparation of the developmental jaw it is determined dentine which is at the stage of formation. Collagenic fibers which synthesize odontoblasts thin and are focused perpendicularly to dentine tubules. What fibers are formed in dentine?

A.Parallel

B.Radial

C.Tangential*

D.Circular E. Angular

On a histological preparation the cut of the jaw of the human’s germ of 2-nd month of development which contains damaged injured of dental epithelial organ is submitted. What histological part of the tooth will not develop?

A.Enamel *

B.Pulp

C.Cementum

D.Periodontium

E.Dentine

An anomaly of development of enamel has been found out. To what damage of structural components of the dental germs it is connected?

A.External epithelia of the enamel organ

B.Internal epithelia of the enamel organ*

C.Pulp of the enamel organ

D.Dental sac E. Dental pulp

In process of embryonic developments there was a damage superficial mesenchymal cells of dental papilla. It can result in infringement of formation of what structure of a tooth?

A.Dentine *

B.Enamel

C.Cementum

D.Periodontium

E.Cuticle

In the process of the tooth’s morphogenesis there was a damage of internal cells of dental sac. What formation of structures of the tooth will be broken?

A.Pulp

B.Enamel

C.Dentine

D.Cementum *

E.Periodontium

An insufficient development of a pulp of the tooth was revealed. What embryonic source has tested damage?

A.Mesenchyma *

B.Ectoderm

C.Endoderm

D.Oral epithelia

E.Nervous tube

On a histological preparation of sagital section of developmental jaw of a 3,5-month's human fetus it is observed epithelial enamel organ surrounded by compactly located mesenchymal cells. How it refers to mesenchymal formation?

A.Dental papilla

B.Dental sac *

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C.External enamel cells

D.Internal enamel cells

E.Pulp of enamel body

The child of 11 years in an x-ray picture does not have lateral teeth (adentia). It is connected with:

A.Infringement of formation of dental papilla

B.Infringement of formation of dental sac

C.Infringement of formation of enamel organ *

D.Infringement of formation of dentine

E.Infringement of formation of cementum

In embryogenesis of oral cavity there was an infringement of development of enamel of the teeth. What source of teeth’s development has been broken?

A.Mesoderm

B.Mesenchyma

C.Epithelia *

D.Dental sac

E.Dental papilla

During development of the tooth in structure of enamel organ there are cells with prismatic shape which have six-angular section; the nucleus is located in the central part of a cell. What it for cells?

A.Preameloblasts *

B.External ameloblasts

C.Stem cells

D.Cells of the pulp of enamel organ

E.Preodontoblasts

After formation of dentine process of inversion in cells - moving of the nucleus and organelles begins. What cells this process concerns?

A.Odontoblasts

B.Ameloblasts*

C.Preodontoblasts

D.Cementoblasts

E.Cementocytes

At microscopic research of biopsy it was revealed infringement of development of the periodontum. What source of development of the tooth is broken?

A.Dental papilla

B.Dental sac*

C.Dental plate

D.Preameloblasts

E.Ameloblasts

Experimentally at the germ in a dental germ the external layer of dental sac has been destroyed. Specify, what structure of a tooth will not have the subsequent development?

A.Pulp

B.Enamel

C.Dentine

D.Cementum

E.Periodontium*

At the second stage of development of the tooth in enamel organ and dental papilla polyhedral cells are formed. To what attributes it is possible to determine a bookmark of the pulp of the tooth on preparations, taking into account, what it has mesenchyme origin?

A. On presence of blood vessels*

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cells of stomach wall:

ACells of prysmatic glandular epithelium*

BParietal cells of gastric glands

CChief-cells of gastric glands

DCervical cells of gastric glands

EEndocrinocytes

3 years ago a 52 y.o. man underwent an operation for stomach extraction. Results of blood analysis: erythrocytes - 2,0x1012/l, Hb85 g/l, colour index - 1,27. These changes were caused by disturbed assimilation of the folowing vitamin:

AB12*

BB6

CC

DP

EA

Examination of a patient, suffering from atrophic gastritis, revealed megaloblastic anemia. The anemia is likely to be caused by the deficiency of the following substance:

AGastromucoproteid*

BVitamin B6

CVitamin B1

DIron

EErythropoietins

The man of 35 years with a stomach ulcer the resection of antral department of stomach is made. Which secretion of gastrointestinal hormone as a result of operation will be broken most of all?

A.Gastrin*

B.Secretin

C.Neurotenzin

D.Hystamine

E.Holecystokinin

At the patient at gastroscopy the insufficient quantity amount of mucus on a surface of mucosa is revealed. To what infringement of function of stomach’s cells it is connected?

A. Parietal cells

B. Columnar cells*

C. Endocrinocytes

D.Cervical cells

E.Chief cells

On histologic preparation the cross-section of alimentary tubular organ’s wall which mucous shall is covered by nonkeratinazed epithelia is submitted. What is the organ?

A.Uterus

B.Duodenun

C.Small intestine

D.Esophagus *

E.Appendix

On the fourth week of embryonic developments occurs physiological atresia of esophagus. Up to the end of the eighth week it again becomes passable. What biological process provides recanalisation of esophagus at human embryo?

A.Descvamation

B.Меiosis

C.Necrosis

D.Apoptosis*

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Premature infants have syndrom of respiratory failure. Failure of what aerohematic barriere component underlies this pathology?

ASurfactant*

BCapillary endothelium

CBasal membrane of endothelium

DBasal membrane of alveolocytes

EAlveolocytes

At the patient with a dry pleuritis noise of friction of pleura is listened. At what defeat of type of epithelia this symptom is marked?

A.Compound

B.Simple squamous*

C.Transitional

D.Cuboidal

E.Cilindrical

In a histologic preparation the organ which wall consists of mucosa, submucosa, fibrocartilage and аdventitial shalls is submitted. Epithelia - pseudostratified, lamina muscularis is absent, in submucous – mixed glands, hyaline cartilage forms the openended rings. What organ has this morphological attributes?

A.Trachea*

B.Terminal bronchiole

C.Segmental bronchi

D.Alveola

E.Larynx

In an electronic microphoto the cells of alveoles are founded. They are the part of aerohaematic barrier. What are these cells?

A.Secretory alveolocytes

B.Respiratory alveolocytes *

C.Alveolar macrophages

D.Endocrinocytes

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