Diffusion Across a Cell Membrane. Diffusion is the movement of a substance across a membrane. Substances diffuse across cell membranes in a process known as passive transport. This means that the cell does not expend any energy in transporting substances across the cell membrane. Instead, substances move down their concentration gradient as a result of random thermal motion.
401k and profit sharing plans are both forms of retirement plans. They allow employees to make pre-tax contributions to an account where contributions and earnings are not taxed until distributed. Some 401k plans require an employer to make contributions to a plan.
Profit-Sharing Plan. What is a 'Profit-Sharing Plan'. A profit-sharing plan, also known as a deferred profit-sharing plan or DPSP, is a plan that gives employees a share in the profits of a company. Under this type of plan, an employee receives a percentage of a company's profits based on its quarterly or annual earnings.