Cell Structure and Transport Reinforcement (S347)

Front

What is diffusion?

Back

Diffusion is the passive movement of molecules from an area of high concentration to an area of low concentration until equilibrium is reached.

Front

What is osmosis?

Back

Osmosis is the passive transport 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 facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses membrane proteins to help move molecules across the cell membrane from high concentration to low concentration.

Front

What is active transport?

Back

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

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules to pass through while blocking others, maintaining the internal environment of the cell.

Front

What happens to a cell in a hypotonic solution?

Back

In a hypotonic solution, water enters the cell, causing it to swell and potentially burst.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water leaves the cell, causing it to shrink.

Front

What is the role of membrane proteins in transport?

Back

Membrane proteins facilitate the transport of substances across the cell membrane, either passively or actively.

Front

What is pump transport?

Back

Pump transport is a type of active transport where a membrane protein pumps one substance in one direction while transporting another substance in the opposite direction.

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 concentration gradient.