Structural Organisation In Animals Question 127
Question: Assertion : Deposits of protein keratin are present in deeper layers of stratified keratinised squamous epithelium. Reason : Keratin makes this epithelium impervious to water.
Options:
A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If the assertion is false but reason is true
Show Answer
Answer:
Correct Answer: D
Solution:
Keratinised stratified squamous epithelium is a compound epithelium which covers the dry surface of skin.
It has many layers of epithelial cells.
The deeper layers are formed by living polygonal cells but superficial layers constitute of horny, scale like remains of dead squamous cells.
Heavy deposits of the insoluble protein keratin in the dead superficial cells make the epithelium impervious to water and highly resistant to mechanical abrasions.
BETA
