Cell Transport

Front

What is Exocytosis?

Back

Exocytosis is the process by which cells move 'big stuff' out of the cell by vesicles that fuse with the cell membrane, releasing their contents outside.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance between two locations, which drives the movement of molecules from high to low concentration.

Front

What does permeable mean?

Back

Permeable means that a membrane allows certain substances to pass through it.

Front

What is Facilitated Diffusion?

Back

Facilitated Diffusion is the process by which molecules move across the cell membrane from an area of high concentration to an area of low concentration with the help of carrier proteins.

Front

What is the function of the cell membrane?

Back

The cell membrane protects the cell, provides structure, and regulates what enters and exits the cell.

Front

What is Osmosis?

Back

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

Front

What is Active Transport?

Back

Active Transport is the movement of molecules across a cell membrane against their concentration gradient, requiring energy (ATP).

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.

Front

What are vesicles?

Back

Vesicles are small membrane-bound sacs that transport materials within the cell and to the cell membrane.

Front

What is the role of carrier proteins in cell transport?

Back

Carrier proteins assist in the transport of substances across the cell membrane, especially during facilitated diffusion and active transport.