The gastrointestinal tract has recently come to the forefront of multiple research fields. It is
now recognized as a major source of signals modulating food intake, insulin secretion and …

The digestive tract plays a central role in the digestion and absorption of nutrients. Far from
being a passive tube, it provides the first line of defense against pathogens and maintains …

5.!. Trypsins 5.2. Chymotrypsins 5.3. Cysteine proteinases 5.4. Aspartic proteinases 5.5.
Miscellaneous proteinases 5.6. Aminopeptidases 5.7. Carboxypeptidases 5.8. Dipeptidases …

▪ Abstract Formed of proteins, glycoproteins, and chitin microfibrils in a proteoglycan matrix,
the peritrophic matrix (PM) separates the food from the midgut epithelium in most but not all …

▪ Abstract The study of fat metabolism in insects has received considerable attention over the
years. Although by no means complete, there is a growing body of information about dietary …

There is aa fluid (peritrophic gel) or membranous (peritrophic membrane, PM) film
surrounding the food bolus in most insects. The PM is composed of chitin and proteins, of …

The peritrophic matrix (or peritrophic membrane) lines the gut of most insects at one or more
stages of the life cycle. It has important roles in the facilitation of the digestive processes in …

For honey bee workers, protein requirements and consumption, digestion, intestinal
absorption and utilisation all depend on the worker's age and functional status in the system …

Publisher Summary This chapter presents recent progress in the study of the midgut,
particularly with reference to ion and water transport. However, the midgut does not function …

The nutritional morphology, physiology and ecology of terrestrial isopods (Isopoda:
Oniscidea) is significant in two respects.(1) Most oniscid isopods are truly terrestrial in terms …