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MCQ Flashcards

1
Q

What is the special stain of adipose C.T.?
a. Van Gieson’s
b. Mallory trichrome
c. Sudan III
d. Silver
e. Ver Hoeff’

A

c. Sudan III

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2
Q

Which is true about white fibrous C.T.?
a. Form a network
b. Can be stained with mallory trichrome
c. Its fibers can branch
d. Can recoil after stretch
e. Formed of thin and straight fibers

A

b. Can be stained with mallory trichrome

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3
Q

Which of the followings is a character of the reticular fibers?
a. White in fresh section
b. Not stained by H&E
c. Recoil after stretch
d. Can be stained with Ver Hoeff’s stain
e.The strongest fibers

A

b. Not stained by H&E

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4
Q

What is the Connective tissue fibers?

A

White Collagen
Yellow Elastic
Reticular

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5
Q

How can you stain Connective tissue fibers?

A

White collagenous F.
✓ H&E: acidophilic
✓ Mallory trichrome: blue
✓ Van Gieson’s: red
Yellow elastic F.
✓ H&E: acidophilic
✓ Ver Hoeff’s: black
✓ Van Gieson’s: yellow
Reticular F.
✓ H&E: not stained
✓ Silver: black

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6
Q

What is the character of White
collagenous & reticular F. ?

A

White
collagenous
White in fresh section
Strong & resist stretch
Wavy, thick and not
branched

reticular F
Form a reticulum
Very thin that branch and
anastomose forming a network

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7
Q

Connective tissue proper cells

A

fixed:
-Undifferentiated
mesenchymal cells
-Fibroblast
-Adipose
-Reticular

free:
Mast
Plasma
Macrophage
Pigment

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8
Q

What is the cell responsible for
production of antibodies?
Secretion of histamine & heparin?

A

Plasma cells Mast cells

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9
Q

What is the origin of plasma cells &Macrophage?

A

-Activation of B
lymphocytes
-Blood monocytes

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10
Q

how many adipose cells in our
body? Their sites?

A

White: Majority of adipose
C.T. in adults e.g. subcutaneous
tissue
Brown: Newborn infants
In adults: Mediastinum

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11
Q

What is the structure of both types of adipose white and brown?

A

white;
Lobules of large fat cells
Cytoplasm contains single large fat globule which
pushes the nucleus to one side (signet ring
appearance)
Less blood capillaries

brown:
Lobules of small fat cells
Cytoplasm contains numerous small fat
droplets
The nucleus is central and rounded
More blood capillaries

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12
Q

What is the stain of white
adipose?

A

H&E: signet ring appearance
Sudan III: orange
Sudan black: black

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13
Q

What is the type of C.T. present in the
sclera of the eye?

A

Irregular type of White fibrous C.T.

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14
Q

What are the functions of the
neuroepithelial cells?

A

Sensory cells: Transport nerve
impulse
Supporting cells: support the
sensory cells
Basal cell: Act as
precursors
(stem) for the
other cells

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15
Q

Can you identify the type of the
following glands?
Salivary glands, Intestinal glands, Sebaceous and
mammary
glands

A

Salivary glands
Compound
Tubulo-alveolar
Intestinal glands
Simple Tubular
Sebaceous and
mammary
glands
Alveolar

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16
Q

What is the changes occurring in
these during secretion?
Merocrine glands, Apocrine glands, Holocrine glands

A

Merocrine glands
secretory cells are
not affected
Apocrine glands
the apical part of
the cells is
destroyed
Holocrine glands
The whole cell
is destroyed

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17
Q

Classify glandular epithelium
according to ducts
Exocrine gland Endocrine gland Mixed gland

A

Exocrine Gland salivary glands Endocrine Thyroid gland Mixed gland pancreas and liver

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18
Q

what are the junctions between cells

A

Tight junction
adheation junction Protein Protein 20 nm
Actin F
Actin F
Adherens junctions
Desmosome intermidate F
30 nm
heridesmoses intermidate F
Gap junction

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19
Q

which epith is responsible for regenerating

A

Basal columnar layer.

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20
Q

What is the general character of the epithelial tissue?

A
  • The epithelial cells rest on a thin basement membrane
    separates them from the underlying connective tissue.
  • Avascular (no blood supply) but receive nutrition by
    diffusion from underlying connective tissue.
  • Nerve cells are present.
  • Develop from 3 germ layers. ectoderm, mesoderm, endoderm
  • Continuous degeneration & Regeneration
21
Q

Can you classify epithelial Tissue

A

Neuroepithelium
Covering
Glandular
Simple
Stratified

22
Q

What is the shape of nuclei in each
type of Simple epithelium? Mention
the sites of each epithelium?

A

Epithelium Simple Squamous
Shape of nuclei Flat bulging
Sites Blood vessels, and heart, Lung alveoli, Serous membranes.
Epithelium Simple Cubical
Shape of nuclei Central
rounded
Sites Thyroid follicles
Renal tubules
Epithelium Simple Columnar
shape of nuclei basal oval
sites:
non-modified = large ducts of glands
secretory epithelium= stomach.
Absorptive = intestine
ciliated=fallopian tube and uterus
Epithelium Pseudostratified appeared to be arranged in more than
one level.
Shape of nuclei
Ciliated with goblet cells
sites
nasal sinuses
trachea & bronchi
non- motile cilia ( stereocilia) epididymis

23
Q

What is the types of stratified
squamous epithelium? How many
layers form it?

A
  • Non keratinized
  • keratinized
    30 layers
24
Q

What is the sites of non
keratinized stratified squamous
epithelium? Keratinized?

A

Keratinized
Epidermis of skin
non-Keratinized:
* Oral cavity.
* Oesophagus.
* Tympanic membrane.
* Cornea.

25
Q

What is the sites of transitional
epithelium? Why is it called
transitional?

A
  • Pelvis of kidney.
  • Ureters
  • urinary bladder

It can change its
thickness according to
the state of distension
of the bladder

26
Q

What is the shape of top layer of
transitional epithelium and the
underlying layer ?

A
  • Dome shape with
  • Upper convex & lower
    concave surface
  • Rounded nuclei some
    cells are binucleated.
  • covered by a protective
    mucous

The underlying layer :
formed of flask shaped
cells lying in the
concavity of the top
ones

27
Q

How many layers form the Full
bladder ?

A
  • 2 layers
  • Basal cubical layer
  • Flattened other layers.
28
Q

What is the sites of stratified
columnar epithelium?

A

Non-Ciliated
large ducts of the glands.
Ciliated
Foetal oesophagus (rare)

29
Q

Is the cell membrane is seen by LM?

A

It is very thin to be resolved (thickness: 9-10 nm).

30
Q

How cell membrane appears by EM?

A

Trilamellar

31
Q

Which organelle is seen by H&E
& enumerate the special stain for
each organelle

A

Organelle Special stain Color
Mitochondria Janus Green B: green
Golgi apparatus H&E: negative Golgi
image
silver brown
Centrioles iron H dark blue

32
Q

What is the name of the inner
mitochondrial membrane folds?
What is its contents?

A

Cristae or shelves Respiratory and electron
transport enzymes

33
Q

What is the contents of
mitochondrial matrix?

A

Contains the enzymes of Kreb’s cycle &
mitochondrial DNA and RNA.

34
Q

Which organelle is responsible for
lipid synthesis, muscle contraction?

A

sER

35
Q

Which organelle is related to
proteins ?

A

rER

36
Q

Which organelle is related to
secretory function of the cell ?

A

Golgi apparatus

37
Q

What is the face of Golgi apparatus
related to the transfer vesicles?

A

immature face .

38
Q

What are the types secondary
lysosomes?

A

Heterolysosome
Autophagosome
Multi-vesicular body

39
Q

What are the polyribosomes?

A

Ribosomes held together by messenger RNA

40
Q

What is the function of free
ribosomes?

A

synthesis of proteins for the use of the cell

41
Q

What is the function of the
centriole?

A

cell division
* act as basal bodies
of cilia

42
Q

How many microtubules form The
wall of the centriole?

A

Composed of 27 microtubules arranged in 9 (nine) bundles.
Each bundle consists of three micro-tubules (triplets).

43
Q

What is the site & function of the
cilia ?

A
  • Respiratory tract
  • They beat in one direction moving a thin film
    of mucous on the surface of the cells
44
Q

How many microtubules form the
shaft of the cilia?

A

Composed of 9 peripheral doublets of microtubules and 2
central singlets microtubules + 20

45
Q

What is the component of the
nucleus by EM

A
  • Nuclear membrane (2 thin membranes
    separated by a perinuclear space).
  • Chromatin (DNA conjugated with histone
    protein).
  • Nucleolus (contains rRNA+ protein, where
    ribosomes are made).
  • Nuclear sap (colloidal clear solution)
46
Q

By electron microscope, the cell membrane appears formed ofh o w many layers?
* a. 5 b. 3 c. 2 d. 4 e. 1

A

b. 3

47
Q

The trachea is lined by the following epithelium:
*a. Pseudostratified columnar non-ciliated epithelium
*b. Simple squamous epithelium
*c. Simple cuboidal epithelium
Od. Simple columnar epithelium
*e. Pseudostratified columnar ciliated epithelium with goblet cells

A

*e. Pseudostratified columnar ciliated epithelium with goblet cells

48
Q

Which of the following is lined by transitional epithelium?
Urinary bladder Thyroid gland Blood vessels
Intestine Stomach

A

Urinary bladder

medicine (5 decks)

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