Identify the correctly matched structures and numbers. (Select all that apply)

A. Gallbladder: The gallbladder stores and releases bile into the duodenum via the common bile duct when stimulated (e.g., by CCK). It does release a secretion into the duodenum, but it primarily stores bile produced by the liver.
B. Liver: The liver produces bile, which drains via hepatic ducts into the common bile duct and empties into the duodenum -the liver is a primary secretor whose products reach the duodenum.
C. Spleen: The spleen is a lymphoid/hematologic organ (filters blood, immune functions) and does not release digestive secretions into the duodenum.
D. Gastric glands: Gastric glands secrete gastric juice into the stomach lumen (not the duodenum), so they do not release secretions into the duodenum.
E. Pancreas: The exocrine pancreas secretes digestive enzymes and bicarbonate into the duodenum via the pancreatic duct.
F. Intestinal glands: Intestinal glands (crypts of Lieberkühn) secrete intestinal juice directly into the intestinal lumen (including the duodenum), but the most commonly tested paired organs that "release secretions into the duodenum" are the liver (bile) and pancreas (pancreatic juice).

A. Urea: Urea is a normal nitrogenous waste product excreted in urine; its presence alone is not indicative of diabetes (it reflects protein metabolism/kidney function).
B. Creatinine: Creatinine is a normal urinary waste product used to assess kidney function; its presence alone is not diagnostic of diabetes.
C. Glucose: Glucosuria (significant glucose in urine) suggests hyperglycemia and impaired glucose handling (common in diabetes) -indicative of a diabetic problem if present in large amounts.
D. Ketones: Ketonuria (significant ketones in urine) indicates fat breakdown/ketosis and is a sign of uncontrolled diabetes (e.g., diabetic ketoacidosis) -indicative of diabetic metabolic disturbance.