Cell Membrane & Transport

Front

What is the function of the cell membrane?

Back

The cell membrane controls what enters and exits the cell, providing protection and support.

Front

Define selectively permeable.

Back

Selectively permeable means that the cell membrane allows certain substances to pass while blocking others.

Front

What is osmosis?

Back

Osmosis is the movement 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 diffusion?

Back

Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration until equilibrium is reached.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to help move substances across the cell membrane.

Front

What are the three types of passive transport?

Back

The three types of passive transport are diffusion, osmosis, and facilitated diffusion.

Front

What is active transport?

Back

Active transport is the movement of substances against their concentration gradient, requiring energy (ATP).

Front

What is endocytosis?

Back

Endocytosis is the process by which cells take in materials by engulfing them in a membrane.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel materials by vesicles fusing with the cell membrane.

Front

What is an isotonic solution?

Back

An isotonic solution is one where the concentration of solutes is equal inside and outside the cell, resulting in no net movement of water.