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.
What is the difference between active and passive transport? Passive: When materials move across cell membranes without using cell energy (ATP). Diffusion, facilitated diffusion, and osmosis are examples Moves small molecules like water, oxygen, carbon dioxide and glucose. Active: The movement of materials across the cell membrane that requires the use of cell energy (ATP). Passive transport: When materials move across cell membranes without using cell energy (ATP). Diffusion, facilitated diffusion, and osmosis are examples Moves small molecules like water, oxygen, carbon dioxide and glucose.