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.
http://www.interactive-biology.com-Making Biology Fun. In this episode I show how the Action potential is generated in cardiac muscle cells and how this results in Contraction of the Heart.When the action potential happens, calcium ions are released from the Sarcoplasmic reticulum, causing the plateau. Calcium ions then trigger muscle contraction.n this episode I show how the Action potential is generated in cardiac muscle cells and how this results in Contraction of the Heart.