Biological Perspectives Of Aging

Question 1

Name the 4 theories of ageing?

Answer 1

1) evolutionary
2) cellular
3) molecular
4) system

Question 2

What’s the evolutionary theory about?

Answer 2

That aging occurs due to the accumulation of damage during life and that multiple defensive or repair mechanisms contribute to ageing

Question 3

What does the cellular theory mean?

Answer 3

Cell damage due to oxidative stress

Question 4

What are free radicals?

Answer 4

Processes that damage cells in your body Eg. Pollution, smoking, eating…

Question 5

Free radicals can be “mopped up” by what?

Answer 5

Antioxidants

Question 6

What is the molecular theory?

Answer 6

How insulin can make a healthy lifespan

Question 7

What is the system theory?

Answer 7

Loss of functional reserve (organs) and homeostasis

Question 8

Name an age related change in the lungs?

Answer 8

Weakening of the respiratory muscles

Question 9

Oxidation reactions can produce free radicals which are linked with ageing. Free radicals are.

Answer 9

Highly reactive molecules which cause damage to cellular components

Question 10

Name some respiratory effects on the functional reserve?

Answer 10

1) deceased blood flow, decreasing diffusion in lungs
2) shorter breaths, decreased max breathing capacity
3) respiratory accessory muscles, affecting cough reflex