Cell Transport

Front

What is cell transport?

Back

Cell transport refers to the movement of substances across the cell membrane, which can occur through various mechanisms such as passive and active transport.

Front

What is passive transport?

Back

Passive transport is the movement of materials across a cell membrane without the use of energy, typically moving from an area of high concentration to an area of low concentration.

Front

What is active transport?

Back

Active transport is the movement of materials against their concentration gradient, requiring energy (ATP) to move substances from low to high concentration.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules through a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells engulf substances from the outside environment, bringing them into the cell, often using energy.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel materials to the outside environment, often involving the fusion of vesicles with the cell membrane.

Front

What role do protein channels play in cell transport?

Back

Protein channels facilitate the movement of specific molecules across the cell membrane, allowing substances to pass through without using energy.

Front

What is the difference between diffusion and facilitated diffusion?

Back

Diffusion is the movement of molecules from high to low concentration directly through the membrane, while facilitated diffusion uses protein channels to assist in the transport of larger or polar molecules.

Front

What is the significance of ATP in active transport?

Back

ATP provides the energy required for active transport processes, enabling cells to move substances against their concentration gradients.

Front

What are the two main types of transport across cell membranes?

Back

The two main types of transport are passive transport (no energy required) and active transport (energy required).