Two basic types of acinar epithelial cells exist: Acini in the parotid glands are almost exclusively of the serous type, while those in the sublingual glands are predominantly mucous cells. In the submaxillary glands, it is common to observe acini composed of both serous and mucous epithelial cells. submaxillary (mandibular) glands-produce a mixed serous and mucous secretion. 2  sublingual glands-secrete a saliva that is predominantly mucous in character. 3  serous cells, which secrete a watery fluid, essentially devoid of mucus. 4  mucous cells, which produce a very mucus-rich secretion.
exploratory - serving in or intended for exploration or discovery; an exploratory operation; exploratory reconnaissance; digging an exploratory well in the Gulf of Mexico; exploratory talks between diplomats. explorative. nonexplorative, nonexploratory, unexplorative, unexploratory - not exploratory.
Exploratory research design does not aim to provide the final and conclusive answers to the research questions, but merely explores the research topic with varying levels of depth.âExploratory research tends to tackle new problems on which little or no previous research has been doneâ (Brown, 2006, p.43).n other words, the difference between exploratory and conclusive research designs is that exploratory research design simply explores the research questions, living room for further researches, whereas conclusive research design is aimed to provide final findings for the research.