Arrhythmia Definition. A heart arrhythmia is an irregular heart beat: the beat may be too fast, too slow, or the rhythm may be irregular. Types. Arrhythmias can be classified by their origin (atria or ventricles) and by heart rate. Tachycardia. A fast (over 100 beats per minute) heart rate is called tachycardia.
What are products of the light and dark reactions of photosynthesis? The products of the light reaction are 602, 12 NADPH2 and 18 ATP.    The products of the dark reaction are C6H12O6, 12 NADP, 18 ADP, 18 Phosphates and 6H2O.
In the process, the oxygen atom in the water separates from the hydrogen atoms and passes out as waste. The remaining hydrogen is collected and eventually synthesized into a carbohydrate molecule. The process that creates the actual food for the plant does not require light, so it's called a dark reaction. In another part of the leaf called the stroma, carbon dioxide that's been absorbed from the environment is reduced into carbon and oxygen.