what is the order of passive transport?(in order)
The order of passive transport can be defined in the following sequence:
1. Simple Diffusion: This is the most basic form of passive transport, where molecules move directly across the cell membrane from an area of higher concentration to an area of lower concentration. No energy or specific channels are required for this process.
2. Facilitated Diffusion: Some molecules, such as large molecules or polar molecules, cannot easily pass through the cell membrane by simple diffusion. In this case, specialized protein channels or carriers help facilitate their movement across the membrane. Facilitated diffusion also occurs down the concentration gradient, without the need for energy.
3. Osmosis: Osmosis is the movement of water molecules across a semipermeable membrane from an area of lower solute concentration (higher water concentration) to an area of higher solute concentration (lower water concentration). This occurs until an equilibrium is reached on both sides of the membrane. Osmosis is a specific type of passive transport that doesn't require energy.
It's important to note that the order of passive transport is not a step-by-step process. Rather, it indicates the hierarchy of mechanisms involved in passive transport based on the complexity and nature of the transported molecules.