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Assertion In ageing, power of intake of ...

Assertion In ageing, power of intake of useful materials and expelling of harmful materials out of the cells both decrease.
Reason With age, collagen protein of connective tissue becomes less flexible, less permeable and insoluble.

A

If both assertion and reason are true and the reason is a correct explanation for assertion

B

If both assertion and reason are true and the reason is the incorrect explanation for 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:
A
Collagen froms about `40%` of total protein contents of the body in young age-groups. It is permeable, flexible and soluble, cytoplasm and interstitial fluid through the semipermeable cell membrane. But with advancing age, the collagen protein becomes less flexible, less permeable and insoluble.
Due to these changes, there is a decreased inflow of nutritive substances and oxygen into the cells and also decreased loss of nitrogenous wastes and `CO_(2)` from the body cells. This causes decreased efficiency of body cells and induces ageing.
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