Understanding Aging: Biological and Social Perspectives Quiz

1. What is senescence?

A disease that affects the skin.

Normal process of changes in the body over time

A type of exercise routine.

A term used in computer programming.

Senescence refers to the natural aging process in living organisms, including changes in the body over time.

Explanation

Senescence refers to the natural aging process in living organisms, including changes in the body over time.

2. What is the Cellular Aging Theory?

Older cells have a faster rate of division.

Cells have an unlimited capacity to divide.

Cellular aging is primarily caused by external factors such as diet and exercise.

Cellular aging theory posits that cells have a limited number of divisions before they stop dividing, leading to various age-related issues.

Explanation

Cellular aging theory posits that cells have a limited number of divisions before they stop dividing, leading to various age-related issues.

3. What is the Wear and Tear Theory?

The Wear and Tear Theory claims that external stressors have no impact on the aging process of organs and systems.

The Wear and Tear Theory suggests that all organs and systems can repair themselves indefinitely.

The Wear and Tear Theory argues that only muscle tissue is affected by the natural aging process.

The Wear and Tear Theory is a concept that explains how organs and systems gradually wear out over time, with cells becoming less able to repair themselves. It highlights that areas like muscles, heart, and nervous systems are commonly impacted by this process, which can be accelerated by external factors such as falls or accidents.

Explanation

The Wear and Tear Theory is a concept that explains how organs and systems gradually wear out over time, with cells becoming less able to repair themselves. It highlights that areas like muscles, heart, and nervous systems are commonly impacted by this process, which can be accelerated by external factors such as falls or accidents.

4. What is the theory regarding caloric intake and aging?

Eat only high-fat foods to increase metabolism.

Consume only junk food to speed up the aging process.

Increase calorie intake to double the normal amount.

The theory suggests that decreasing calorie intake by a significant percentage, along with maintaining meticulous nutrition, can slow down aging processes. This is supported by evidence of rats living longer with reduced calorie intake.

Explanation

The theory suggests that decreasing calorie intake by a significant percentage, along with maintaining meticulous nutrition, can slow down aging processes. This is supported by evidence of rats living longer with reduced calorie intake.

5. What are free radicals according to the Free Radical Theory?

Stable molecules with paired electrons

Substances that do not play a role in oxidative stress

Chemical compounds that do not react with other substances

Free radicals are highly reactive chemical compounds with unpaired electrons that can cause damage by reacting with other molecules in a chain reaction until they are neutralized by pairing with each other or antioxidants.

Explanation

Free radicals are highly reactive chemical compounds with unpaired electrons that can cause damage by reacting with other molecules in a chain reaction until they are neutralized by pairing with each other or antioxidants.

6. How have scientists been able to double the life span of fruit flies?

By exposing them to radiation.

Scientists have been able to double life span of fruit flies by selective breeding

By changing their diet.

By genetic engineering.

Selective breeding involves choosing specific traits to pass on to offspring, resulting in extended life span in fruit flies.

Explanation

Selective breeding involves choosing specific traits to pass on to offspring, resulting in extended life span in fruit flies.

7. What is the AUTO IMMUNE THEORY?

The AUTO IMMUNE THEORY states that the immune system only targets external threats and never attacks the body's own cells.

The AUTO IMMUNE THEORY suggests that the immune system becomes dormant and inactive.

The immune system becomes stronger and more efficient in fighting off bacteria and viruses.

The autoimmune theory refers to a condition where the immune system malfunctions and starts targeting the body's own cells, instead of just bacteria and viruses. This can lead to various autoimmune diseases. The theory does not provide a definitive explanation for why it occurs or why it affects certain individuals more than others.

Explanation

The autoimmune theory refers to a condition where the immune system malfunctions and starts targeting the body's own cells, instead of just bacteria and viruses. This can lead to various autoimmune diseases. The theory does not provide a definitive explanation for why it occurs or why it affects certain individuals more than others.

8. Great job! :D

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123

The correct answer is 'dsgh', which is a random sequence of characters unrelated to the question. The incorrect answers provided are 'abc', '123', and 'xyz', which are not relevant to the question at hand.

Explanation

The correct answer is 'dsgh', which is a random sequence of characters unrelated to the question. The incorrect answers provided are 'abc', '123', and 'xyz', which are not relevant to the question at hand.