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Eat Less -- Live Longer

The Clock of Life

Wisdom of the Worms

How to Make a Nose

Use It or Lose It

Viewer Challenge
in the classroom

Never Say Die:
Viewer Challenge Quiz

Watch the Scientific American Frontiers special Never Say Die (Show 1003), and then test your knowledge by answering the following questions.

"Eat Less -- Live Longer"

1. Studies conducted by both Walford and Weindruch suggest two food-related keys to longer life spans, namely:

2. Weindruch found that damage to monkey muscles is caused by:
a. stress
b. high fat
c. free radicals
d. too little exercise
"The Clock of Life"

3. Chromosomes inside the cell contain DNA; at the tips of the chromosomes are the:

4. Progeria is a disease that causes children to:

"Wisdom of the Worms"

5. Bathing nematodes in chemicals caused this to happen:

6. Life span in nematodes is controlled by:
a. neurons.
b. neurotransmitters.
c. physical activity.
d. hormone messengers.
"How to Make a Nose"

7. What kind of cell is used to make all other cells?

8. Pediatric surgeon Vacanti hopes tissue engineering technology can be used to:

a. clone humans.
b. solve shortage of transplant organs.
c. clone dinosaurs.
d. address population issues.
"Use It or Lose It"

9. When compared to brains of elderly, unstimulated rats, the stimulated rats showed these two effects in their brains:

a. denser neuron fibers.
b. more blood vessels.
c. accumulation of plaque.
d. slower synapses.
10. List three ways to maintain a youthful brain:



Scientific American Frontiers
Fall 1990 to Spring 2000
Sponsored by GTE Corporation,
now a part of Verizon Communications Inc.