Cell Membrane and Cell 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 facilitated diffusion.

Back

Facilitated diffusion is the process of transporting molecules across a membrane with the help of proteins, without using energy.

Front

What is the difference between osmosis and diffusion?

Back

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

Front

What role does the cell wall play in plant cells?

Back

The cell wall provides structural support and protection, preventing plant cells from bursting in hypotonic solutions.

Front

What are the hydrophilic parts of the lipid bilayer?

Back

The phosphate heads of the phospholipids are hydrophilic, meaning they are attracted to water.

Front

What is active transport?

Back

Active transport is the movement of molecules across a membrane against their concentration gradient, requiring energy.

Front

What is endocytosis?

Back

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

Front

What is exocytosis?

Back

Exocytosis is the process of vesicles fusing with the cell membrane to release their contents outside the cell.

Front

Define passive transport.

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, following the concentration gradient.

Front

What is the significance of concentration gradients in cell transport?

Back

Concentration gradients drive the movement of molecules, with substances moving from areas of high concentration to areas of low concentration.