Assertion and Reason
Directions:
Each of these questions contains an Assertion followed by Reason. Read them carefully and
answer the questions on the basis of following options.
You have to select from following the one that best describes the two statements. These questions consist of two statements- assertion and reasoning.
Choose any one of the four options given below.
a) If both assertion and reason are true and reason is correct explanation of assertion.
b) If both assertion and reason are true and reason is not the correct explanation of assertion.
c) If the assertion is true but reason is false.
d) If both assertion and reason is false.
Assertion :
Peristalsis is the rhythmic contraction and expansion of smooth muscle cells of
alimentary canal to help push the food further down the canal.
Reason : Smooth muscles contract fast and powerfully , get tired easily .
Q4. Assertion : The inner lining of intestine has tall epithelial cells.
Reason : Columnar epithelium facilitates absorption and secretion.
Q5.Assertion: The cells of connective tissues except blood secrete fibres. Reason: Fibres provide strength, elasticity and flexibility to the tissue
Answers
Answer:
Q4.Columnar epithelium is a type of simple epithelium characterised by the presence of tall column-like cells. Its major function is absorption or secretion. It covers the inner surface of the intestine, stomach and gall biadder. In the intestine, it appears to have a brush like appearance on the free surface, which is due to the presence of a large number of microvilli. The function of microvilli is to enhance absorption, Due to the presence of microvilli, the epithelium is also called as brush bordered columnar epithelium.
Q5. Fibroblasts are the main cells of connective tissue, which secrete various types of fibres. ... All provide strength, elasticity and flexibility to the connective tissue. So, the correct answer is 'Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion'.
Explanation: