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.
Explain the activity of water as a solvent. Water is a polar molecule. When water dissolves ions, the partial negative charge of oxygen attracts positive ions and the partial positive charge on the hydrogen attracts negative ions. Most ions are dissolved because of waterâs ability to act as a solvent, as are proteins and other solutes. 9.