H1-antihistamines work by binding to histamine H1 receptors in mast cells, smooth muscle, and endothelium in the body as well as in the tuberomammillary nucleus in the brain; H2-antihistamines bind to histamine H2 receptors in the upper gastrointestinal tract, primarily in the stomach.
3 NADH molecules and 1 FADH molecule is produced for every turn of the Krebs cycle. One molecule of glucose will result in two turns of the Krebs cycle because two pyruvate molecules are the result of one glucose molecule (pyruvate if fed into the Krebs cycle after it is converted into acetyl-CoA).
â¢ NADH, FADH2 â discuss role and how much energy each one produces. o NADH and FADH2 carry electrons released as GLUCOSE is broken down in. GLYCOLYSIS and KREBS CYCLE to the ETC where they release the. electrons to the ETC and the energy is used to make a H+ concentration. gradient used to power ATP Production. o 1 NADH makes 3 ATP, 1 FADH2 makes 2 ATP. Step in Cellular.