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Assertion : Cell junctions are present ...

Assertion : Cell junctions are present in the epithelium and other tissues
Reason : Among cell junctions, adhering junctions help to stop substances from leaking across a tissue

A

If both assertion and reason are true and reason is the correct explanation of assertion

B

If both assertion and reason are true but reason is not the correct explanation of assertion

C

If assertion is true but reason is false

D

If both assertion and reason are false

Text Solution

Verified by Experts

The correct Answer is:
C
All cells in epithelium are held together with little intercellular material. In nearly all animal tissues, specialised junctions provide both structural and functional links between its individual cells. Three types of cell junctions are found in the epithelium and the other tissues. These are called as tight, adhering and gap junctions. Adhering junctions perform cementing function to keep neighbouring cells together,
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Which of the following junctions help to stop substances from leaking across a tissue?

Read the following statements carefully : (1) Gap junction facilitates the cells to communicate with each other by connecting the cytoplasm of two adjoining cells to cytoplasm of two adjoining cells . (2) Adhering junctions help to stop substances from leaking across a tissue . (3) compound epithelium covers the dry surface of the skin only and provides protection against chemical and mechanical stresses. (4) most of the bones in vertebrates embryos are replaced by cartilages in adults. How many of the above statement is/are correct ?

How many of the following junctions are found in epithelium tissue :-

Read the following statements and choose the correct answer. (i) Gap junctions cement adjacent cells together. (ii) Areolar tissue contains fibroblasts , macrophages and mast cells. (iii) Tight junctions facilitate the cells to communicate with each other (iv) Adhering junctions help to stop substances from leaking across tissues (v) Cells of connective tissue except blood secrete fibres of structural proteins called elastin.

The cell junctions called tight, adhering and gap junctions are found in

Cell junctions called tight , adhering and gap junctions are found in

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