Search results
Results from the WOW.Com Content Network
Osmoregulation is the active regulation of the osmotic pressure of an organism's body fluids, detected by osmoreceptors, to maintain the homeostasis of the organism's water content; that is, it maintains the fluid balance and the concentration of electrolytes (salts in solution which in this case is represented by body fluid) to keep the body fluids from becoming too diluted or concentrated.
This is due to urea entering the cell down its concentration gradient, followed by water. The osmolarity of normal saline, 9 grams NaCl dissolved in water to a total volume of one liter, is a close approximation to the osmolarity of NaCl in blood (about 290 mOsm/L). Thus, normal saline is almost isotonic to blood plasma.
In other words, the length of the loop of Henle limits the concentration of the gradient, i.e., the longer the loop, the greater the osmotic gradient. Thus, longer loops would allow for steeper gradients and greater capacity to concentrate urine. Through the countercurrent multiplier the loop of Henle increases the osmolarity of the medulla.
They go into hibernation when the temperatures start to drop or when food is hard to come by. Like bears do, they "bulk up" for their hibernation before they choose to do it.
An effector is the target acted on, to bring about the change back to the normal state. At the cellular level, effectors include nuclear receptors that bring about changes in gene expression through up-regulation or down-regulation and act in negative feedback mechanisms. An example of this is in the control of bile acids in the liver. [4]
Robert De Niro loves being a dad!. The Oscar winner, 81, opened up about mornings spent with his 20-month-old daughter Gia in an interview with The Sunday Times published on Saturday, Jan. 4. "I ...
Gypsy-Rose Blanchard and ex-husband Ryan Scott Anderson have finalized their divorce.. The news of the finalization comes eight months after the former inmate and victim of Munchausen syndrome by ...
Cerebrospinal fluid (CSF) is a clear, colorless body fluid found within the tissue that surrounds the brain and spinal cord of all vertebrates.. CSF is produced by specialized ependymal cells in the choroid plexus of the ventricles of the brain, and absorbed in the arachnoid granulations.