In resolving a longstanding dispute, the Food and Drug Administration has announced that it will rescind approval for three of the four arsenic drugs that had been used in animal feeds at the request of the companies that market them.he issue of arsenic in food has drawn increased public scrutiny since research last year by Consumer Reports found substantial arsenic levels in rice. Arsenic residue in rice often comes from the water used to grow it, and poultry feces are widely used as fertilizer for a variety of crops.
a net-like structure in the cytoplasm of animal cells (especially in those cells that produce secretions), stack of membranes in the cell that modifies, sorts, and packages proteins from the endoplasmic reticulum. packaging products for shipping.
Cytoplasm â¢ Basically the ï¬uid ï¬lling up the cell: sugars, amino acids and proteins. â¢ If uses this stuff to carry out its day to day activities. â¢ Organelle - the macromolecular structure in the cytoplasm which has a speciï¬c function. â¢ Cytosol - organic molecules and ions in solution (cytoplasm). Plasma Membrane â¢ Encloses the cell and separates its contents from its surroundings. â¢ Itâs a phospholipid bilayer (2 layers) about 5-10 nm which has proteins imbedded in it. â¢ The proteins are responsible for interacting with the environment. â¢ Transport proteins - move molecules and ions in and out. â¢ Receptor proteins - can cause change within the cell if they come in contact with neighbouring cells and also be able to identify particular cells.