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: The actual name of the movement of water from an area of more water molecules to an area fo less water molecule is actually called osmosis.This is what drives the water molecules-i.e. concentration gradient.. Which can only occur through a semi-permeable membrane.