For organisms to coordinate their growth and development with nutrient availability, they
must be able to sense nutrient levels in their environment. Here, we review select nutrient …

There are diverse physiological functions of nitrogen end products in different animal
groups, including excretion, acid–base regulation, osmoregulation and buoyancy. Animals …

Page 1 0349-4 Supreme Court Appellate term SSOCIATION OF THE BAR с CITY OF NE
YORK 1928 Vol 25 October Term Page 2 DEC 28 1928 155454 Page 3 766 New York …

Bowel is used in urological surgery as a substitute for the ureter, and for bladder
augmentation, replacement of the bladder and genital reconstruction. With the advent of …

It is generally accepted that gases such as CO2 cross cell membranes by dissolving in the
membrane lipid. No role for channels or pores in gas transport has ever been demonstrated …

In Saccharomyces cerevisiae, the transport of ammonium across the plasma membrane for
use as a nitrogen source is mediated by at least two functionally distinct transport systems …

Because the mammalian bladder must store urine of composition which differs markedly
from that of plasma for prolonged periods, the bladder permeability barrier must maintain …

Ammonia excretion from the gill in teleost fish is essential for nitrogen elimination. Although
numerous physiological studies have measured ammonia excretion, the mechanism of …

Biological membranes provide selective barriers to a number of molecules and gases.
However, the factors that affect permeability to gases remain unclear because of the difficulty …

PHYSIOLOGISTS have long pondered the riddle of why the stomach is itself not digested by
the very juice it secretes. One explanation is that a mucus-bicarbonate barrier, coating the …