Biological Changes Flashcards
What happens to brain neurons as we age?
0-50% decrease
What happens to glomeruli as we age?
50% decrease
What happens to liver weight as we age?
20% decrease
What happens to coronary blood flow as we age?
30% decrease
What happens to vital capacity as we age?
40% decrease
What happens to max breathing capacity as we age?
80% decrease
What happens to GFR as we age?
Decrease 50%
What happens to muscle strength as we age?
Decreases 20%
What is the average height loss between ages 20-80?
1-4 inches
What happens to the arch of the foot as we age?
Flattens
What happens to the spinal curvature as we age?
Increased
What must be done to Ca level supplementation after menopause?
Double
What are the skin changes seen with aging?
Thinning of the epidermis
Loss of elasticity
Loss of subcutaneous adipose
What is xerosis?
Dry skin
What are the eye changes in geriatric patients?
Decrease tears
Ectropion
Iris fades
Why are greens and blues bad with aging?
Cones degenerate
Presbycusis affects which sex more?
Males
By what age do most adults have trouble hearing above 4000 Hz?
60
What is the range of normal speech (hz)?
500-2000
By age 70, CO is reduced by what?
up to 70%
Why does the heart muscle get more irritable as we age?
Hypoxia
What vitamin in particular do we have problems absorbing as we age?
B12
What happens to the bone marrow as we age?
fatty deposition
What happens to cerebral blood flow by age 70?
up to 20% decrease
Decreases in dopamine = ?
Parkinsonism
Decreases in Ach = ?
Dementias
What are the three leading causes of death in geriatric patients?
- Heart
- CA
- Lower lung infx
