Structural Organisation In Animals Question 102
Question: Assertion : Surface of skin is impervious to water. Reason : Surface of skin is covered by stratified cuboidal epithelium.
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 both the assertion and reason are false
Show Answer
Answer:
Correct Answer: C
Solution:
Surface of skin is impervious to water because it is covered by stratified keratinised squamous epithelium.
This epithelium has many superficial layers of horny, scale like remains of dead squamous cells and several deeper layer of living polygonal cells.
Heavy deposits of the insoluble protein keratin are present in the dead superficial layers which makes this epithelium impervious to water.
Stratified cuboidal epithelium, on the other hand lines the inner surface of sweat gland, larger salivary and pancreatic ducts.
BETA
