While a plant-based meal would qualify as vegan (adjective), a person who follows a plant-based (vegan) diet is not necessarily a vegan (noun). For example, someone could follow a plant-based diet but still wear leather and have no moral issue with hunting or killing animals for food.
Ball-and-stick model of cimetidine, the prototypical H 2 -receptor antagonist. The H2 receptor antagonists are a class of drugs used to block the action of histamine on parietal cells (specifically the histamine H2 receptors) in the stomach, decreasing the production of acid by these cells.he H 2 antagonists are competitive antagonists of histamine at the parietal cell H 2 receptor. They suppress the normal secretion of acid by parietal cells and the meal-stimulated secretion of acid.
H2 Antagonists i.e. H2 Blockers, competitively inhibit the action of histamine at H2 receptors on gastric parietal cells, thereby inhibiting gastric acid secretion. The onset of action is within 30 minutes if given IV, and within 1 hour if given PO.By either route the duration of action is 10-12 hours.2 Antagonists i.e. H2 Blockers, competitively inhibit the action of histamine at H2 receptors on gastric parietal cells, thereby inhibiting gastric acid secretion. The onset of action is within 30 minutes if given IV, and within 1 hour if given PO.