Diabetes Mellitus (“sweet urine”) : Metabolic disorder characterized by high blood sugar (glucose) levels resulting from defects in insulin secretion or.

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Presentation transcript:

Diabetes Mellitus (“sweet urine”) : Metabolic disorder characterized by high blood sugar (glucose) levels resulting from defects in insulin secretion or action Two types: Type I (juvenile onset) –  -cells of pancreas are incapable of producing insulin (need insulin shots) Type II (adult onset) – Insulin is produced, but cells have become insulin resistant (resulting in abnormally high blood glucose levels) *lifestyle related Application to Chronic Diseases

Diabetes Mellitus: Diabetes is the 6 th leading cause of death in the U.S. and the leading cause of blindness, kidney failure, and limb amputation 80% of type II diabetes related to obesity Application to Chronic Diseases

Diabetes Mellitus: Application to Chronic Diseases 76% increase in type II diabetes in adults since 1990 Currently 16 million American afflicted, with number expected to rise to 23 million by 2025 Figure 20.20

Diabetes Mellitus: In children: 1 out of 4 children show signs of type II diabetes Disease has more than tripled in the past 3-5 years 4% of diabetes in children was type II in 1990; now it is 20% Of children diagnosed with type II diabetes, 85% are obese Application to Chronic Diseases

Problems with high blood glucose levels: Decreased cellular uptake of glucose causes blood sugar ( mg/dl) to spill over into urine Decrease in cellular glucose causes diabetic to rely on fatty acid metabolism (but cannot metabolize fatty acids completely) Ketone bodies (highly acidic) are result of incomplete fatty acid metabolism and result in cellular acidosis Over time, decrease in pH can lead to diabetic coma Application to Chronic Diseases

How does Type II diabetes develop? Application to Chronic Diseases Normal Response Figure 20.21

Application to Chronic Diseases Insulin Resistant How does Type II diabetes develop? Figure 20.21

Application to Chronic Diseases Type II Diabetes How does Type II diabetes develop? Diagnosed: Fasting glucose of 126 mg/dl (twice) Random test shows glucose at 200 mg/dl (and thirst, frequent urination, fatigue) Glucose tolerance test shows glucose at 200 mg/dl at 2 hours Figure 20.21

How does nutrition impact diabetes mellitus? Foods with high glycemic index cause insulin “spike”, which can result in peripheral tissues becoming insulin resistant (hyperinsulinemia) Application to Chronic Diseases

How does nutrition impact diabetes mellitus? Diet high in fiber may reduce risk for developing type II diabetes: 6 year study of 67,173 women showed that women who ate a low-fiber diet with high glycemic index (potatoes, white bread) had 2.5 times the rate of type II diabetes than women who ate more fiber-rich food (whole grains, fruits, vegetables) Because fiber slows carbohydrate digestion it minimizes surges in blood sugar throughout the day Fewer surges in blood glucose decrease insulin demand and further decrease insulin resistance Application to Chronic Diseases

How does nutrition impact diabetes mellitus? To reduce risk of type II diabetes, consume more slowly absorbed, unrefined, complex carbohydrates (with low glycemic index) These foods provide “slow-release” carbohydrate without triggering rapid fluctuations in blood sugar Application to Chronic Diseases