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.
Distributions from a donor-advised fund to the sponsoring organization of such donor-advised fund, or to any other donor-advised fund, are not taxable distributions. IRC 4967 applies a 125-percent excise tax on a donor, donor advisor, or related person who gives advice to have a sponsoring organization make a distribution from a donor-