Membrane Transport

Front

What is membrane transport?

Back

The process by which substances move across the cell membrane, either entering or leaving the cell.

Front

What is passive transport?

Back

Movement of molecules across the cell membrane without the use of energy, typically down their concentration gradient.

Front

What is active transport?

Back

Movement of molecules against their concentration gradient, requiring energy (ATP) to occur.

Front

Define equilibrium in the context of membrane transport.

Back

A state where the concentration of a substance is equal inside and outside the cell, resulting in no net movement.

Front

What is osmosis?

Back

The diffusion of water molecules across a selectively permeable membrane.

Front

What is a hypotonic solution?

Back

A solution with a lower concentration of solutes compared to the inside of the cell, causing water to flow into the cell.

Front

What is a hypertonic solution?

Back

A solution with a higher concentration of solutes compared to the inside of the cell, causing water to flow out of the cell.

Front

What is an isotonic solution?

Back

A solution with an equal concentration of solutes inside and outside the cell, resulting in no net movement of water.

Front

How does a cell maintain homeostasis?

Back

By regulating what enters and leaves the cell through the cell membrane.

Front

What role do transport proteins play in membrane transport?

Back

They facilitate the movement of specific molecules across the cell membrane.