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.
In active transport transport proteins pick up molecules and carry them. Passive transport is the movement of materials through a cell membrane without the use of energy.Examples of this are diffusion and osmosis which move form low to high concentration.he movement of materials across the cell membrane without using cellular energy is called passive transport. The movement of materials against a concentration difference is k â¦ nown as active transport. Active transport requires energy.