Why a Chest Tube is Placed. A chest tube is placed for a variety of reasons. One reason, as you mentioned, is to help the lung re-inflate when someone has a collapsed lung, also known as a pneumothorax. In that circumstance, a chest tube is inserted along the side of the ribs to allow the lung to reinflate.
A. Osmosis is the passive movement of water from an area high in water concentration, across a semi-permeable membrane, to an area low in water concentration.
Rating Newest Oldest. Best Answer: Oxygen and Carbon dioxide are probably the best examples. Passive or simple diffusion is the movement of solutes (gas or ions) from an area of high concentration to an area of low concentration. It depends on the concentration of the solute, permeability of the membrane, and controlled by thermodynamic principles. It will not utilize membrane proteins.