In most cases, that air makes a whistling or wheezing sound as it moves through narrowed passages. Excessive mucus production, shortness of breath, and cough are the other classic symptoms of asthma. But in cough-variant asthma, coughing is the only symptom. It sounds exotic, but it's far from rare.
Definition of photosystem : either of two photochemical reaction centers consisting chiefly of photosynthetic pigments complexed with protein and occurring in chloroplasts: a: one that absorbs light with a wavelength of about 700 nanometers â called also photosystem I b: one that absorbs light with a wavelength of about 680 nanometers â called also photosystem II new!
subsystem. 1. a smaller system within a larger one; it has a purpose of its own but also contributes to the overall purpose of the system to which it belongs. 2. in family systems theory, a triad, dyad, or other group of members who are linked by a special association.ubsystem. 1. a smaller system within a larger one; it has a purpose of its own but also contributes to the overall purpose of the system to which it belongs. 2. in family systems theory, a triad, dyad, or other group of members who are linked by a special association.