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L 10 , 11, Epithelial Tissue, Histology

 Lecture video part 1 







 lecture video part 2   







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MCQ  

1/ Which one of the following statements about stratified squamous epithelium is true?

(A) The surface layer of cells is always keratinized.
 (B)The cells in its most superficial layer are flattened.
(C) Its basal cells rest on an elastic lamina.
D) Its cells lack desmosomes.
E) It lines the ducts of sweat glands.

2/ Transitional epithelium:

(A) Often has stereocilia as a surface modification.
(B) Is often associated with the respiratory tract.
 (C) Is usually one cell layer thick.
(D)The superficial cells are broad cubical.
(E) Is present in the female urethra.

3/ What type of epithelium appears stratified, but is not?
(A) Epithelioid tissue.
(D) Transitional.
(B) Mesothelium.
(E) Pseudostratified.

4/ What type of tissue lines blood vessels?

(A) simple squamous epithelium
 (B) simple cuboidal epithelium.
 (C) Transitional epithelium.
(D) simple columnar epithelium. 
(E) stratified squamous epithelium.

5/ What type of gland secretes its product directly into the blood stream?

(A) Endocrine gland.
(D) Unicellular gland.
(B) Multicellular gland.
(E) Holocrine gland.

6/ In apocrine glands, the secretory product is released:
(A) From a unicellular gland called a goblet cell.
(B) Upon destruction of the entire gland cell.
(C) Through exocytosis with no cellular damage.
(D) By pinching off the apical portion of the cytoplasm.
(E) Directly into the blood stream.

7/ What forms the striated border?

(B) Stereocilia.
(C) Cilia. 
(D) Keratinization.
 (E) Microvilli.

8 _ Which One of the following statements about 
the gap junctions is true? 

(A) It extends as a zone around the apical perimeter of adjacent cells.
(B) It possesses dense plaques composed in part of desmoplakins.
(C)It permits the passage of ions from one cell to an adjacent cell.
(D) Its adhesion is dependent upon calcium ions.
(E) It possesses transmembrane linker glycoproteins.

9/Which of the following characteristics are false of epithelia? 
(A) They line body surfaces
(B) They are vascular
(C) Most epithelial cells have the ability of regeneration
(D) They are separated from the underlying connective tissue by a basal lamina

10/ Which one of the epithelial subtypes listed below typically is also Simple squamous?
(A)Mesothelium
B-Distended transitional (in distended organs)
C- keratinized
e_ Pseudostratified

 11/ Simple cuboidal epithelium is found in?

A /Large blood vessels
B/Small intestine
C/Thyroid gland.
D/Urinary bladder
E/ None of the above

12/ Stratified squamous epithelium?

A/Consists of a single layer of flattened cells
B/Is protective rather than secretory or absorptive
C/Is keratinized where it lines enclosed areas
D/Has rich supply of capillaries running between its cell layers

 13/ The epithelium that lines all body openings on the skin is?
A/Endothelium
B/Pseudostratified columnar
C/ Stratified squamous
D/Stratified columnar
E/Mesothelium

14/ Which of the following features is of epithelium that has protective role
A/ Stratified
B/Phagocytic activity
C/Antibody production
D/Possesses microvilia
E/Has a brush border

Answers 


1/B
2/D
3/E
4/A
5/A
6/D
7/E
8/C
9/B
10/A
11/c
12/B
13/C
14/A

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