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.
A profit-sharing plan is a type of defined contribution plan that is sometimes used as a. supplement to a primary defined benefit plan. Sometimes these plans are structured in such. a way that employees share in their companiesâ profits and potentially gain a greater. interest in their firmsâ success.