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

What is diffusion?

Back

Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration until equilibrium is reached.

Front

What is osmosis?

Back

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

Front

What is active transport?

Back

Active transport is the movement of substances against their concentration gradient, requiring energy (usually in the form of ATP) to occur.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process by which substances move across a cell membrane with the help of transport proteins, without the use of energy.

Front

What factors influence cell transport?

Back

Factors include size, charge, and concentration gradient of the substance, but not shape.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane is a barrier that allows certain substances to pass while blocking others, crucial for maintaining homeostasis in cells.

Front

What role do proteins play in facilitated diffusion?

Back

Proteins act as channels or carriers that help specific molecules cross the cell membrane without using energy.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance between two areas, which drives the movement of molecules during diffusion.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their gradient.