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Pseudostratified Epithelium
MCQ questions and answers.
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MCQ Questions
1. Why is pseudostratified epithelium called 'pseudostratified'?
A.
It has many layers of cells
B.
It appears multilayered because the nuclei lie at different levels
C.
It has no basement membrane
D.
It contains only dead cells
Correct Answer:
It appears multilayered because the nuclei lie at different levels
Explanation:
Pseudostratified epithelium appears to have several layers because its nuclei are located at different heights, although it is actually a single layer.
2. How many layers of cells does pseudostratified epithelium actually contain?
A.
One layer
B.
Two layers
C.
Three layers
D.
Many layers
Correct Answer:
One layer
Explanation:
Pseudostratified epithelium is a simple epithelium because all of its cells form a single layer.
3. In pseudostratified epithelium, which structure is contacted by all cells?
A.
The apical surface
B.
The basement membrane
C.
The blood vessel lumen
D.
The connective tissue nucleus
Correct Answer:
The basement membrane
Explanation:
All cells of pseudostratified epithelium touch the basement membrane, even though not all cells reach the free surface.
4. Where is ciliated pseudostratified epithelium commonly found?
A.
The respiratory tract
B.
The outer layer of skin
C.
The lining of blood vessels
D.
The surface of bones
Correct Answer:
The respiratory tract
Explanation:
Ciliated pseudostratified epithelium commonly lines parts of the respiratory tract, where cilia help move mucus and trapped particles.
5. What is the main function of cilia in respiratory pseudostratified epithelium?
A.
To produce red blood cells
B.
To move mucus and trapped particles
C.
To store fat
D.
To absorb bone minerals
Correct Answer:
To move mucus and trapped particles
Explanation:
Cilia beat in a coordinated manner to move mucus and particles along the respiratory passage.
6. Which type of cell is commonly associated with pseudostratified epithelium in the respiratory tract?
A.
Goblet cell
B.
Red blood cell
C.
Bone cell
D.
Muscle cell
Correct Answer:
Goblet cell
Explanation:
Goblet cells are commonly present in respiratory pseudostratified epithelium and secrete mucus.
7. What is the role of goblet cells in pseudostratified epithelium?
A.
They secrete mucus
B.
They conduct nerve impulses
C.
They contract the tissue
D.
They form bone tissue
Correct Answer:
They secrete mucus
Explanation:
Goblet cells in pseudostratified epithelium secrete mucus, which helps trap dust and microorganisms.
8. Which feature helps distinguish pseudostratified epithelium from truly stratified epithelium?
A.
All cells of pseudostratified epithelium touch the basement membrane
B.
Pseudostratified epithelium has no nuclei
C.
Pseudostratified epithelium is made only of dead cells
D.
All cells of pseudostratified epithelium are arranged in many layers
Correct Answer:
All cells of pseudostratified epithelium touch the basement membrane
Explanation:
Although pseudostratified epithelium looks multilayered, all its cells contact the basement membrane, showing that it is a single-layered epithelium.
9. What is the appearance of the nuclei in pseudostratified epithelium?
A.
They are located at the same level
B.
They are located at different levels
C.
They are absent from the cells
D.
They are found outside the tissue
Correct Answer:
They are located at different levels
Explanation:
The nuclei lie at different heights within pseudostratified epithelium, creating its false multilayered appearance.
10. Pseudostratified epithelium is classified as which type of epithelium?
A.
Simple epithelium
B.
Compound epithelium
C.
Transitional epithelium
D.
Glandular connective tissue
Correct Answer:
Simple epithelium
Explanation:
Pseudostratified epithelium is classified as simple epithelium because it has only one layer of cells, despite appearing multilayered.
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