The volume number of RBC refers to the number of blood cells in each cubic millimeter of blood. This number is determined by the erythropoietin hormone.
erythropoietin
Endocrine
kidneys secrete an hormone named Erythropoietin which stimulates RBC production
erythropoitin secreted from kidneys stimulate rbc production.
The production of red blood cells is stimulated by erythropoietin, which is produced in the kidneys.The production of white blood cells is stimulated by mainly colony-stimulating factor, which is produced by endothelial cells and marrow fibroblasts.The production of platelets is stimulated by thrombopoietin, which is produced in the liver and kidneys.
I don't know the name of the hormone but I do know that it signals other glands to produce growth hormones.
Red blood cell production, also called erythropoiesis, is mainly stimulated by a protein hormone called erythropoietin (EPO). Other factors, including cytokines like the colony-stimulating factors (CSFs) are also important.
Hormones are regulated by what are called negative feedback mechanisms. When more is needed, more will be released and the opposite is true when there is enough. For example, the secretion of follicle-stimulating hormone decreases as the amount of circulating estrogen increases.
Antidiuretic hormone (ADH) is regulated by the pituitary gland. The anitidiuretic hormone maintains blood pressure and controls incoming water through the kidneys
red blood cell
The parathyroid hormone
Growth hormone.
This would be the polypeptide hormone or the antidiuretic hormone. It is important that this hormone is secreted for the best health.