Chapter 23, Problem 17TE

To determine

The reason for having $\text{10\%}$ polyunsaturated fatty acids while mammals cannot produce so.

Answer to Problem 17TE

It is due to the accumulation of the intake of polyunsaturated fatty acids from outside dietary sources.

Explanation of Solution

It is not possible for mammals to produce polyunsaturated fatty acids but it can be taken from outside dietary sources. The metabolic activity leads to the accumulation of the fatty acids inside the body and is responsible for the removal of it. In pigs, the metabolic activity, leads to the accumulation of the polyunsaturated fatty acids below the kidney region called lard. The pigs generally are inactive which leads to more and more accumulation of the fatty acids.

Conclusion:

Therefore, it is due to the accumulation of the intake of polyunsaturated fatty acids from outside dietary sources