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.
News and Comment. 1  Research Highlights | 20 October 2016. Synaptic plasticity: Spinal signals This study suggests that brain-derived neurotrophic factor (BDNF) is released from dendritic spines in response to activity and acts in an autocrine manner to mediate structural plasticity of the spine from which it was released.