Transport Mechanisms in Cells

The video tutorial explains passive and active transport mechanisms in cells. Passive transport, including diffusion and osmosis, moves substances along their concentration gradient without energy input. Facilitated diffusion, a type of passive transport, involves proteins but still requires no energy. Active transport, on the other hand, uses ATP to move substances against their gradient, such as moving glucose from low to high concentration. Bulk transport, a form of active transport, includes endocytosis and exocytosis for moving large particles in and out of cells.

What is a key characteristic of passive transport?

• It requires ATP.

• It moves substances from low to high concentration.

• It involves movement with the concentration gradient.

• It only occurs in plant cells.

Which process is an example of passive transport?

• Exocytosis

• Active transport

• Facilitated diffusion

• Endocytosis

What is required for active transport to occur?

• A concentration gradient

• Osmosis

• Diffusion

• ATP

Which of the following is a form of bulk transport?

• Facilitated diffusion

• Osmosis

• Endocytosis

• Diffusion

What is the role of exocytosis in cells?

• To transport large particles out of the cell

• To move substances with the gradient

• To bring large particles into the cell

• To facilitate diffusion