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!
photosystem ii PSII is a multisubunit protein complex located in the thylakoid membranes of all types of plants, algae, and cyanobacteria (Barber 2003). At its heart is the reaction center (RC) core, where light energy is converted to electrochemical potential energy and where the water-splitting reaction occurs.