Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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The accumulation of reactive oxygen species (ROS) can have particularly detrimental effects in cells. One way in which cells combat ROS is through detoxification enzymes that operate in the mitochondria and turn the ROS into more stable products. Even so, aging is an inevitable consequence of the accumulation of ROS in our cells. Which of the following statements about aged cells are correct, in reference to reactive oxygen species?
1. Aged cells may show more signs of ROS damage.
2. Aged cells occur because we are more exposed to radiation and air pollution later in our lives.
3. Aged cells could benefit from a greater dietary intake of an antioxidant like Vitamin C.
4. The accumulation of ROS that ages our cells occurs because the mitochondria stops functioning.
A.
1, 2 and 3
B.
1 and 3
C.
2 and 4
D.
4 only
E. All of 1, 2, 3 and 4 are correct.
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