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.
But, they wonât be taxable on the distribution if the tax-free provision is available. Not being taxable on income is the equivalent of a deduction. So the direct transfer from an IRA to charity can be looked at as the nonitemizerâs charitable deduction. Tax-free direct charitable/IRA distributions (Tax-free charitable IRA rollover)âmaltum in parvo (in a nutshell).