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.
How are the dark reactions that occur in plants dependent on the light reactions? a. The chemical energy used in the dark reactions is produced in the light reactions. b. The light reactions produce the oxygen necessary for the dark reactions to proceed. c. Light energy absorbed during the light reactions is used directly in the dark reactions. d. During the light reactions, carbon dioxide is converted to sugars, which are used during the dark reactions.