A heart attack happens when blood flow to the heart suddenly. becomes blocked and the heart canât get oxygen. quickly, the heart muscle fails to pump and begins to die. disease (CHD), also called coronary artery disease.
A co-receptor is a cell surface receptor that binds a signalling molecule in addition to a primary receptor in order to facilitate ligand recognition and initiate biological processes, such as entry of a pathogen into a host cell.n immunology in particular, the term co-receptor often describes a secondary receptor used by a pathogen to gain access to the cell, or a receptor that works alongside T cell receptors such as CD4, CD8, or CD28 to bind antigens or regulate T cell activity in some way.
In Physiology [edit]. 1  Carotid bodies and aortic bodies detect changes primarily in oxygen. 2  The chemoreceptor trigger zone is an area of the medulla in the brain that receives inputs from blood-borne drugs or hormones, and communicates with the vomiting center to induce vomiting.here are two main classes of the chemosensor: direct and distance. 1  Examples of distance chemoreceptors are: 2  olfactory receptor neurons in the olfactory system: Olfaction involves the ability to detect chemicals in the gaseous state.