If it is true that...

Stress, a "respiratory defect", and free radical damage are common factors in disease and aging

and

The polyunsaturated fats make the lungs more sensitive to excess oxygen or hyperventilation, they make the eyes more sensitive to light, and they make the brain more sensitive to fatigue

Then it must be true that...

Old organisms are easily injured by inappropriate excitation

If it is true that...

Stress, a "respiratory defect", and free radical damage are common factors in disease and aging

Then it must be true that...

All organs are subject to the same kinds of damage

If it is true that...

Stress, a "respiratory defect", and free radical damage are common factors in disease and aging

and

Free fatty acids that are mobilized from storage tissues in the night and in the winter also tend to increase with aging as the ability to tolerate stress decreases

Then it must be true that...

Old organisms are easily injured by inappropriate excitation