What happens to the volume of solids liquids and gases when they cool? Solids- stays the same Liquids- stays the same Gases- decreases You can use the formula PV/T=P2V2/T2 P=initial pressure V=initial volume T=initial temp P2=final â¦pressure V2=final volume T2=final temp (MORE) 2 people found this useful.
Active transport requires the use of energy or ATP. In active transport you go against the concentration gradient, and for that ATP is used. Their are two types of active transport. Primary and secondary active transports and both use ATP, thou secondary uses less ATP than primary. Passive transport does not use any ATP.
Sometimes diffusion is too slow or cell need to take or get rid of substances against a concentration gradient. Cells achieve this task by a special process called active transport. Active transport is the movement of substance across the cell membrane against a concentration gradient. Unlike the osmosis, active transport needs a great deal of energy, which has to be obtained from ATP. Active transport is achieved with the help of carrier protein in the plasma membrane. Usually the ions like Na+, Cl- and K+, and the molecules like glucose, amino acids, and vitamins are transported by active transport. For example, plants absorb mineral ions by using active transport.