26.In humans, an excessive accumulation of uric acid in the joints produces a condition known as ______. A. ulcers B. gastroesophageal reflux disease (GERD) C. gout D. high blood pressure E. rickets 27.In mammals, uric acid is produced as a waste product of the degradation of: A. proteins B. purine nucleotides C. polysaccharides D. lipids 28.Which hormone is secreted by the pancreas to lower high blood glucose levels? A. Insulin B. Glycogen C. Glucagon D. Adrenaline E. Antidiruetic hormone  Â