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.
The dark reaction occurs in the stroma of the chloroplast. This reaction is called carbon fixation or the Calvin cycle. In this reaction, carbon dioxide is converted to sugar using ATP and NADPH. Carbon dioxide is combined with a 5-carbon sugar to form a 6-carbon sugar.The 6-carbon sugar is broken into two sugar molecules, glucose and fructose, which can be used to make sucrose. The reaction requires 72 photons of light.n this reaction, carbon dioxide is converted to sugar using ATP and NADPH. Carbon dioxide is combined with a 5-carbon sugar to form a 6-carbon sugar. The 6-carbon sugar is broken into two sugar molecules, glucose and fructose, which can be used to make sucrose. The reaction requires 72 photons of light.