The evidence that urea is present in high concentration in the cells of the convoluted tubules of the kidney and is passing through these cells has been reviewed. Following the deposition of a large amount of carmine in the cells of the convoluted tubules the rate of urea excretion, as measured by the relation of the rate of urea excretion to the blood urea concentration, is increased. This is ...

TUNE, BRUCE M., AND MAURICE B. BURG. Glucose transport by proximal renal tubuler. Am. J. Physiol. 221(Z) : 580-585. 197 1 .-Glucose transport was studied in isolated, perfused rabbit proximal renal tubules. Glucose was actively transported out of the lumen of both the convoluted and straight portions. The rate of glucose transport was, however, much greater in the convoluted portion than in the...

I . Application of the Gomori method to sections of the terrestrial nemertine Geonemertes dendyi shows that there is no alkaline phosphatase in the flame cells or in the distal glandular canal of the protonephridia. But the proximal ciliated convoluted canal and the branching ciliated terminal ducts are rich in this enzyme. 2. Sections of the terrestrial triclad Rhynchodemus terrestris show the...

All ants studied so far have a convoluted gland portion as part of their venom gland. The venom glands of the amblyoponine genera Amblyopone, Mystrium, Onychomyrmex and Prionopelta, however, are characterized by the absence of a convoluted gland, which makes this ponerine tribe exceptional among ants. The venom gland of Amblyoponini is similar to that of mutillid wasps, which supports a possibl...

the effect of dose and regimen of organic acids on micro-flora and morphology of small intestine were studied in a total of 300 male day old broiler chicks using completely randomized design. salkil had no significant effects on the number of villi per view field and percent of convoluted villi. salkil had a significant effect on the number of tongue, ridge shaped (p