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 requires energy from both NADPH and ATP. In this part of photosynthesis carbon dioxide is fixed. Energy from NADPH and ATP is used to convert glucose (a six carbon molecule) into ribulose diphosphate (a five carbon sugar molecule). Ribulose diphosphate can combine with carbon dioxide eventually forming glucose. Chloroplasts contain both DNA and ribosomes.