OSHA considers methylene chloride to be a potential occupational carcinogen. Short-term exposures to high concentrations may cause mental confusion, lightheadedness, nausea, vomiting, and headache. Continued exposure may also cause eye and respiratory tract irritation. Exposure to methylene chloride may make symptoms of angina more severe. Skin exposure to liquid methylene chloride may cause irritation or chemical burns. Allegra-D 24 Hour 180 mg / 240 mg (Sanofi-Aventis)
2 3 5 Distinguish Between Active And Passive Transport And R. Movement of materials into and out of cells takes place either passively or actively. Passive movement includes diffusion and osmosis, passive movement requires no energy input from the cell â since the molecules follow a concentration gradient. Active transport requires energy as the molecules are forced against the concentration gradient.
1. How do passive and active transport differ from each other? Passive transport â¢ Does not require the use of energy. â¢ Moves solutes and solvents across a cell membrane, from higher to lower concentration. â¢ Simple diffusion â passive transport of small solutes thru the lipid bilayer. â¢ Facilitated diffusion â transfer of larger molecules thru carrier or channel proteins. â¢ Osmosis â diffusion of water thru the lipid bilayer. Active Transport