Image: Seals are consumers. An ecosystem is made up of animals, plants and bacteria as well as the physical and chemical environment they live in. The living parts of an ecosystem are called factors while the environmental factors that they interact with are called abiotic factors.
Atrial natriuretic peptide (ANP), also called atrial natriuretic factor (ANF), atrial natriuretic hormone (ANH), cardionatrine, cardiodilatin (CDD), or atriopeptin, is a powerful vasodilator, and a protein (polypeptide) hormone secreted by heart muscle cells.
Aldosterone enhances reabsorption of Na+, Cl-, and water in the proximal convoluted tubule by stimulating the activity of Na+/H+ antiporters. Atrial Natriuretic Peptide (ANP) 5. a. What stimulates ANP secretion from atrial cells of the heart? A large increase in blood volume promotes release of atrial natriuretic peptide from the heart. b. What affect does ANP have on the following: i. smooth muscle in blood vessel walls â Stretching of the atria of the heart that occurs with an increase in blood volume stimulates ANP secretion. ii. proximal convoluted tubule cells - ANP suppresses reabsorption of Na+ and water in proximal convoluted tubule cells and collecting duct. iii. glomerular ...