Aging-Phys Flashcards
Senescence
Period of life from old age to death
What percentage does chronic diseases account for in the US?
70%
Define “aging”
Deterioration in function of all tissues and organ systems
Age-Dependen changes definition
Changes that are inevitable with age:
- Decreased number of cells in the body
- Decreased cell division
- Increased cell death
- Malfunction of many cells that remain
Age-Related changes definition
Changes that have a great incidence with age but are NOT inevitable
Age-Dependent Changes: Body Composition
- Decreased total body water
- ->Reduced proteins and lean body mass, increased body fat
- Difficult regulating body temp
- Impaired thirst
- Risk of dehydration greater
Age-Dependent Changes: Musculoskeletal System (muscle changes)
- Reduced muscle mass!
- ->Lose Type II fibers
- Reduced muscle strength
- Decreased: Aerobic capacity, cartilage strength, tendon flexibility
Age-Dependent Changes: Musculoskeletal System (Bone changes)
- Decreased bone density
- Degenerative joints
- Spinal curvature
Is osteoporosis a normal part of aging?
NO! Preventable
Age-Dependent Changes: Cardiovascular
- Slowed HR
- Decreased elasticity, Decreased compliance and Increased vascular stiffness
- Atherosclerosis–> Increased Systolic BP
What age-dependent changes in the respiratory system can increase the risk of infection in older adults?
Intercostal musculature atrophy
Age-Dependent Changes: Pulmonary
- Decreased lung elasticity and recoil
- ->Decreased radial traction=early airway closure and air trapping @ end-expiration
- ->Trapped air increases FRC and RV
What is the most common dermatologic symptom among older patients?
Xerosis (dry skin)
Why does hair turn gray in older patients?
Decreased Melanin
Why do older patients have increased frequency of micturition?
-Decreased bladder capacity
