Brain natriuretic peptide (BNP), also known as B-type natriuretic peptide, is a hormone secreted by cardiomyocytes in the heart ventricles in response to stretching caused by increased ventricular blood volume. BNP is named as such because it was originally identified in extracts of pig brain.
How your bladder works. Your bladder is controlled by a complex system of nerves from your autonomic nervous system (parasympathetic and sympathetic), as well as by your spinal nervesare nerves that enter and exit the spinal cord, transmitting sensory and motor information to and from the brain.
Homeostasis. It is important that the bodyâs internal environment is controlled. For example, the amount of carbon dioxide in the bloodstream is carefully controlled. Maintaining a constant internal environment is called homeostasis. The nervous system and hormones are responsible for this. Here are some of the other internal conditions that are controlled: Blood sugar level. This is controlled to provide cells with a constant supply of energy. The blood sugar level is controlled by the release and storage of glucose, which is in turn controlled by a hormone called insulin. Body temperature. This is controlled to maintain the temperature at which enzymes work best, which is 37Â°C. 1  Body temperature is controlled by: 2  controlling blood flow to the skin. 3  sweating. 4  shivering.