AP BIOLOGY

Detailed explanation-1: -A substance diffuses over a membrane by passive transport as it diffuses along its concentration gradient without requiring any energy from the cell. The two types of passive transport are : Simple diffusion and facilitated diffusion .

Detailed explanation-2: -Simple diffusion and osmosis are both forms of passive transport and require none of the cell’s ATP energy.

Detailed explanation-3: -Both diffusion and osmosis are passive transport processes, which means they do not require any input of extra energy to occur. In both diffusion and osmosis, particles move from an area of higher concentration to one of lower concentration.

Detailed explanation-4: -Osmosis is a form of passive transport when water molecules move from low solute concentration(high water concentration) to high solute or low water concentration across a membrane that is not permeable to the solute. There is a form of passive transport called facilitated diffusion.

Detailed explanation-5: -Summary. The cell membrane is selectively permeable, allowing only certain substances to pass through. Passive transport is a way that small molecules or ions move across the cell membrane without input of energy by the cell. The three main kinds of passive transport are diffusion, osmosis, and facilitated diffusion.