Kidneys with a complete parenchymal bridge in the sinus, which is diagnostic for a duplex collecting system, were also excluded from the study. The children were between 1 month and 18 years old (mean age, 6.1 Â± 5.9 years).he objective of our study was to develop, by use of ultrasound, nomograms of renal parenchymal thickness, medullary pyramid thickness (height), renal length, and the ratio of medullary pyramid thickness to parenchymal thickness in healthy children.
erythropoietin. a glycoprotein hormone secreted by the kidney in the adult and by the liver in the fetus, which acts on stem cells of the bone marrow to stimulate red blood cell production (erythropoiesis).
2. The hormone __________, which is secreted by cells of the thyroid gland, works with the parathyroid hormone to regulate the calcium levels in the blood and tissues. calcitonin. 3. The __________ gland secretes hormones that control the activity of the other endocrine glands.pituitary.4.The hormone __________ is secreted by the adrenal medulla and stimulates the sympathetic nervous system.. The __________ gland secretes hormones that control the activity of the other endocrine glands. pituitary. 4. The hormone __________ is secreted by the adrenal medulla and stimulates the sympathetic nervous system.