MCQ Flashcards
(48 cards)
What is the special stain of adipose C.T.?
a. Van Gieson’s
b. Mallory trichrome
c. Sudan III
d. Silver
e. Ver Hoeff’
c. Sudan III
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
b. Can be stained with mallory trichrome
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
b. Not stained by H&E
What is the Connective tissue fibers?
White Collagen
Yellow Elastic
Reticular
How can you stain Connective tissue fibers?
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
What is the character of White
collagenous & reticular F. ?
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
Connective tissue proper cells
fixed:
-Undifferentiated
mesenchymal cells
-Fibroblast
-Adipose
-Reticular
free:
Mast
Plasma
Macrophage
Pigment
What is the cell responsible for
production of antibodies?
Secretion of histamine & heparin?
Plasma cells Mast cells
What is the origin of plasma cells &Macrophage?
-Activation of B
lymphocytes
-Blood monocytes
how many adipose cells in our
body? Their sites?
White: Majority of adipose
C.T. in adults e.g. subcutaneous
tissue
Brown: Newborn infants
In adults: Mediastinum
What is the structure of both types of adipose white and brown?
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
What is the stain of white
adipose?
H&E: signet ring appearance
Sudan III: orange
Sudan black: black
What is the type of C.T. present in the
sclera of the eye?
Irregular type of White fibrous C.T.
What are the functions of the
neuroepithelial cells?
Sensory cells: Transport nerve
impulse
Supporting cells: support the
sensory cells
Basal cell: Act as
precursors
(stem) for the
other cells
Can you identify the type of the
following glands?
Salivary glands, Intestinal glands, Sebaceous and
mammary
glands
Salivary glands
Compound
Tubulo-alveolar
Intestinal glands
Simple Tubular
Sebaceous and
mammary
glands
Alveolar
What is the changes occurring in
these during secretion?
Merocrine glands, Apocrine glands, Holocrine glands
Merocrine glands
secretory cells are
not affected
Apocrine glands
the apical part of
the cells is
destroyed
Holocrine glands
The whole cell
is destroyed
Classify glandular epithelium
according to ducts
Exocrine gland Endocrine gland Mixed gland
Exocrine Gland salivary glands Endocrine Thyroid gland Mixed gland pancreas and liver
what are the junctions between cells
Tight junction
adheation junction Protein Protein 20 nm
Actin F
Actin F
Adherens junctions
Desmosome intermidate F
30 nm
heridesmoses intermidate F
Gap junction
which epith is responsible for regenerating
Basal columnar layer.
What is the general character of the epithelial tissue?
- 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
Can you classify epithelial Tissue
Neuroepithelium
Covering
Glandular
Simple
Stratified
What is the shape of nuclei in each
type of Simple epithelium? Mention
the sites of each epithelium?
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
What is the types of stratified
squamous epithelium? How many
layers form it?
- Non keratinized
- keratinized
30 layers
What is the sites of non
keratinized stratified squamous
epithelium? Keratinized?
Keratinized
Epidermis of skin
non-Keratinized:
* Oral cavity.
* Oesophagus.
* Tympanic membrane.
* Cornea.
