kidneys will secrete a hormone called erythropoietin
For the short term and with reasonable amounts of water, ingested water will increase blood volume only transiently. However if there is kidney or cardiac problems or in cases where massive amounts of water is ingested the increase in volume plus the decrease in osmolarity of the blood is fatal.
dehydration, high solute levels in the blood, and low blood volume
The hormone erythropoietin (EPO) is produced by the kidneys in response to low oxygen levels in the body. EPO stimulates the bone marrow to produce red blood cells, which helps increase oxygen delivery to tissues.
"BUN" stands for Blood Urea Nitrogen, which is a common blood test used to measure how much urea nitrogen is in the blood. High levels of BUN may indicate kidney dysfunction, dehydration, or other medical conditions. Low BUN levels can occur in liver disease, malnutrition, or overhydration.
Albumin is a protein produced by the liver and found in the blood. It helps maintain the balance of fluid in the body. Low levels of albumin in a blood test may indicate liver disease, kidney disease, malnutrition, or inflammation.
Low blood volume will cause low blood pressure, high heart rate as the heart tries to compensate. Eventually if the volume is low enough the person will go into hypovolemic shock.
Urea
The cells of the juxtaglomerular complex of the nephron. Granular cells in the kidney monitor alteration in blood pressure. If blood pressure falls and remains low, this specialized cells release the enzyme renin into the blood stream.
Low blood volume means that you do not have the amount of blood that you should have in your body. This could mean that you only have half, or maybe even more. Low blood volume could mean you are losing blood somewhere.
Low iron is most often simply due to low intake in the diet. Other than this, it may be low due to excessive iron loss, which can in turn be caused by blood loss e.g. due to menstruation. Being "low on blood", i.e. a low total blood volume can have entirely different causes. On the one hand, this can also be due to excessive blood loss, though this would require a large wound. On the other hand however, defects in the kidney's water retention mechanisms can lead to excessive loss of water in the urine and thereby reduction of the blood volume (and consequently increase in blood concentration).
dehydration, low blood volume, low blood pressure.
Food rich in sugar can be taken to increase blood volume . And in market plasma volume expanders are also available like low molecular weight dextran which can increase blood plasma.
For the short term and with reasonable amounts of water, ingested water will increase blood volume only transiently. However if there is kidney or cardiac problems or in cases where massive amounts of water is ingested the increase in volume plus the decrease in osmolarity of the blood is fatal.
There are several possible causes for low blood protein levels. One is kidney failure, which results in the blood proteins being lost in the urine. Another is liver failure, which results in insufficient quantities of blood proteins being produced. A third is severe recent hemorrhage, in which total blood volume was lost and only the fluid component has been replaced at the time of blood analysis.
It usually indicates kidney problems or over usage of a diuretic.
The renal artery takes blood to the kidney. The renal vein takes blood away from the kidney. In the kidney, the waste product urea is filtered out of the blood. So the main difference is in the amount of urea in the blood: high in the renal artery and low in the renal vein.
PCV is the volume percentage of red blood cells in a mammals blood. When one's PCV is low, the cause is generally anemia.