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 diffusion, osmosis, and active transport.

Front

Define passive transport.

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, typically moving from an area of higher concentration to an area of lower concentration.

Front

What is active transport?

Back

Active transport is the movement of substances against their concentration gradient, from an area of lower concentration to an area of higher concentration, requiring energy (ATP).

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance between two areas, which drives the movement of particles.

Front

Explain osmosis.

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of transporting substances across a cell membrane with the help of carrier proteins, moving from high to low concentration without energy.

Front

What role do carrier proteins play in cell transport?

Back

Carrier proteins assist in the movement of specific molecules across the cell membrane, particularly during facilitated diffusion and active transport.

Front

What is the difference between simple diffusion and facilitated diffusion?

Back

Simple diffusion occurs directly through the membrane without assistance, while facilitated diffusion requires carrier proteins to help transport substances.

Front

What is the significance of ATP in active transport?

Back

ATP provides the energy required for active transport to move substances against their concentration gradient.

Front

Describe the process of endocytosis.

Back

Endocytosis is the process by which cells engulf substances from the outside environment, forming a vesicle to bring them into the cell.