Ap Biology Lab 1 Questions

Topics: Energy, Osmosis, Potential energy Pages: 2 (621 words) Published: November 26, 2012
AP Biology Lab 1
Ross Lordo

Introduction Questions
1.The solute potential would be -2.48. If the concentration inside the cell is .15 M, then would diffusion out of the cell and into the solution of .1 M. This is due to water potential and the tendency for water to move from areas of high water potential to low water potential. 2.The turgor pressure must be equal to the water potential if there is no net diffusion. The cell and environment have reached equilibrium and the movement of water is equal on both sides.

Getting Started
1.Kinetic energy is the energy an object possesses due to its motion. The difference between kinetic energy and potential energy is the kinetic energy is the energy of an object that is already in motion and potential energy is the energy possessed by an object at rest. Potential energy is stored energy, while kinetic energy is energy being exerted. 2.Temperature can affect the rate of diffusion. If the temperature is colder, the rate of diffusion is much slower as a result of all particles becoming closer together. If the temperature is warmer, there is much more energy present and therefore allows for the diffusion to take place at a fast rate. The distance a molecule needs to travel across the membrane can also affect the rate of diffusion. If the distance across the membrane is large, then the rate of diffusion will be much slower and vise versa. 3.A high temperature can speed up the diffusion process by providing more energy for the molecules and also for eliminating in double bonds in the phospholipid membrane. A low temperature will decline the rate of diffusion, as the particles will have less energy. The distance travelled will also affect diffusion rates. The longer the distance, the slower the diffusion is going to take place. The shorter the distance, the quicker the rate of diffusion 4.Gradients offer a pathway for molecules to go in and out of the cell. Many molecules are to big to fit through the...
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