Learn / Metabolism
Metabolic pathways
Every FMK pathway as a clickable map. Pick one pathway to hammer it — next step, enzyme, regulator, cofactor, and the facts that get tested (NADPH and who needs it, rate-limiting steps, deficiencies) — or set it to all pathways for a mixed drill. Every answer says which enzyme and which pathway.
Carbohydrate digestion & absorption
GALACTOSE
Made from At the brush border: maltose, α-limit dextrins, lactose, sucrose by LACTASE (brush border) — lactose → glucose + galactose
LACTASE (brush border) — lactose → glucose + galactose · irreversible — Carbohydrate digestion & absorption
Deficiency: Lactose intolerance — lactase deficiency, in nearly 70% of the world's adults past infancy. Undigested lactose is fermented in the colon: cramping, bloating, osmotic diarrhoea, positive hydrogen breath test
Galactose then goes on to the galactose pathway in the liver.
Condition cards:Lactose intolerance (lactase deficiency) →
Becomes Monosaccharides inside the enterocyte via SGLT-1 — active, the same carrier as glucose
SGLT-1 — active, the same carrier as glucose — Carbohydrate digestion & absorption