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.
The B-cell receptor is composed of two parts: i) A membrane-bound immunoglobulin molecule of one isotype (IgD, IgM, IgA or IgE).he B-cell receptor is composed of two parts: i) A membrane-bound immunoglobulin molecule of one isotype (IgD, IgM, IgA or IgE).
Phasic receptor. A phasic receptor is a sensory receptor that returns to its resting potential even though the stimulus is still applied. The process by which the magnitude of the generator potential decreases, even when the stimulus is maintained, is called adaptation. 1  Pacinian corpuscles. 2  Tonic receptor. 3  Phasic transmitter.