b, mucous acinus. structure pale-stained, slight-blue, flattened n against the basal membrane mucinogen granule Golgi, RER, mitochondria c. mixed acinus: several serous cell attached to mucous acinus - serous demiluneb. mucous acinus: structure: pale-stained, slight-blue, flattened N against the basal membrane mucinogen granule Golgi, RER, mitochondria c. mixed acinus: several serous cell attached to mucous acinus – serous demilune