Aging

Question 1

What shortens life?

Answer 1

Sex
Male hormones - testosterone
Nutrition
Wisdom

Question 2

What causing ageing?

Answer 2

Aging is due to the gradual build up of unrepaired falts in cells and tssues. This makes us vulnerable to acute and chronic illness.

Bombardment by cellular byproducts
causing cell damage with failed repair mechanisms.
Disopsable soma theory - - somatic line isn’t as important as the germ cell line so the somatic cells are less adapt to survive (protective mechanisms fail)

Not made of a sedentary lifestyle. Starved animals live longer.

Repair and maintenance of cells more important than storage -> survive longer.

Question 3

What changes happen with age?

Answer 3

Psychological - verbal vs performance skills
attention
Processing skill slower
working memory impaired

Physiological
Muscle strength, stiffness
cardiac output
lung volume 
renal function

Question 4

What diseases re more common in older age?

Answer 4

Psychologically
Cognitive decline and dementia more common

Physiological
Frailty - arthritis
Congestive heart disease
COPD
Renal failure

Increased risk from
medications
minor illness
immobility

Question 5

What factors contribute to dementia?

Answer 5

Early:
Less education

Midlife:
hearing loss
hypertension
Obesity

Older age:
Smoking
depression
social isolation
diabetes