HORMONES OF HEART KIDNEY AND GASTROINESTINAL

Hormones of heart, kidney, and gastrointestinal tract. One. Heart. Atrial wall of heart secretes. Peptide Harmon called atrial natriuretic factor (ANF), which decreases BP when BP is increased. ANF is secreted, which causes dilation of blood vessels. This reduces BP. Two. Kidney. The Juxtraglomerular cells of kidney produce two hormones. Namely, erythropoietin, which stimulates bone marrow to produce more RBCs and renin acts on protein angiotensinogen to form angiotensin, and geothermal raises BP to increase ultrafiltration. Three. Gastro intestinal tract. Endocrine cells present in different parts of gastrointestinal tract secrete, four major peptide hormones. One. Gastrin acts on gastric glands and stimulates the secretion of HCL and pepsinogen. Two. Secretin acts on exocrine pancreas and stimulates secretion of water and bicarbonate ions. Three. Cholecystokinin acts on both pancreas and gallbladder and stimulates the secretion of pancreatic enzymes and bile juice. Four. Gastric inhibitory peptide inhibits gastric secretion and motility. Several non endocrine tissues secrete Hormones called growth factors, these factors are essential for normal growth and tissues. And their repairing or regeneration.