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!
Light is absorbed by the antenna pigments of photosystems II and I. The absorbed energy is transferred to the reaction center chlorophylls, P680 in photosystem II, P700 in photosystem I. Absorption of 1 photon of light by Photosystem II removes 1 electron from P680.