NR 601NR midterm SG.NR 601 Midterm Exam review November 2019

Physiological Age related Change Functional Change Implications Integumentary System Loss of dermal and epidermal thickness Loss of subcutaneous tissue and thin epidermis. Prone to skin breakdown and injury Decreased vascularity see • Atrophy of sweat glands resulting in decreased sweat production • Decreased body odor • Decreased heat loss • Dryness • Alteration in thermoregulatory response • Fluid requirements may change seasonally • Loss of skin water • Increased risk of heat stroke Respiratory System Decreased lung tissue elasticity Decreased vital capacity Reduced overall efficiency of ventilatory exchange Cilia atrophy Change in mucociliary transport Increased susceptibility to infection Decreased respiratory muscle strength • Reduced ability to handle secretions and reduced effectiveness against noxious foreign particles • Partial inflation of lungs at rest Increased risk of atelectasisCardiovascular System Heart valves thicken and become fibrotic Reduced stroke volume, cardiac output; may be altered Decreased responsiveness to stress Fibroelastic thickening of the sinoatrial node; decreased number of pacemaker cells Slower heart rate Increased prevalence of arrhythmias Decreased baroreceptor sensitivity (stretch receptors) Decreased sensitivity to changes in blood pressure Prone to loss of balance, which increases the risk for falls GI Liver becomes smaller Decreased storage capacity Decreased muscle tone Altered motility Increases risk of constipation, functional bowel syndrome, esophageal spasm, diverticular disease Decreased basal metabolic rate (rate at which fuel is converted into energy) May need fewer calories NE CONDE) Lab results Lab Test Normal Changes with age Comments UA Protein 0-5mg/100ml Rises slightly May be due to kidney changes with age, urinary tract infection, renal pathology Specific Gravity 1.005-1.020 Lower max in elderly 1.016-1.022 Decline in nephrons impairs ability toconcentrate urine