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.
ANP is produced, stored and released by cardiac. myocytes of the atria of the heart. It is released in. response to atrial stretch and a variety of other. signals induced by hypervolemia, exercise or caloric. restriction (Widmaier et al., 2008). The hormone is. constitutively expressed in the ventricle in response.