The proximal tubule of the nephron is responsible for considerable bicarbonate reabsorption. This transport is achieved indirectly through net secretion of protons. Three mechanisms are capable of H+ secretion in the tubular ...

Motilin is one of the numerous peptides found in intestinal mucosa. In animals, plasma motilin variations were associated with the regulation of the migrating motor complex. The place of motilin in human physiology has ...

The MAIDS (murin AIDS) syndrome is induced by a defective retrovirus. The syndrome starts by the proliferation of infected B cells and affected mice develop lymphadenopathy and splenomegaly. The functions of B cells as ...

The rete mirabile of the eel swim-bladder is a countercurrent perfused microvascular organ made of alternating arterial and venous capillaries which function as gas exchangers in order to maintain fish buoyancy. The organ ...

Active neuropeptides are produced through the processing of pro-proteins at pairs of basic amino acids (lysine and arginine). The enzymes responsible for the cleavage of pro-proteins (convertases) have been recently ...

Lung cancer comprises a group of histologically distinct malignancies - small cell, epidermoid, adenocarcinoma and large cell - which are collectively responsible for the largest number of cancer-related deaths in Western ...

Human thymic dendritic cells (DC) represent a member of the family of bone marrow-derived dendritic cells. They have a dendritic shape and are found in small number mainly at the corticomedullary border and in medullary ...

Insulin and C-peptide have been revealed by immunocytochemistry in the pancreatic tissue. Combination of good ultrastructural preservation leading to immunolabelings of high resolution with quantitative evaluations, has ...

This paper identifies the major psychological long term sequelae observed following a severe traumatic head injury and discusses their impact on a range of functional activities. In addition, the possibility of a computerized ...