1100: Cell Transport

Front

What is cell transport?

Back

Cell transport refers to the movement of substances across the cell membrane, which can occur through various mechanisms such as diffusion, osmosis, and active transport.

Front

Define passive transport.

Back

Passive transport is the movement of molecules across the cell membrane without the use of energy, typically moving from an area of higher concentration to an area of lower concentration.

Front

What is active transport?

Back

Active transport is the process of moving molecules against their concentration gradient (from low to high concentration) using energy, often in the form of ATP.

Front

What role do transport proteins play in cell transport?

Back

Transport proteins facilitate the movement of polar and charged molecules across the cell membrane, which cannot easily pass through the lipid bilayer.

Front

What is osmosis?

Back

Osmosis is the diffusion 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 a hypertonic solution?

Back

A hypertonic solution has a higher concentration of solutes compared to the inside of the cell, causing water to move out of the cell and potentially leading to cell shrinkage.

Front

What is a hypotonic solution?

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, causing water to move into the cell and potentially leading to cell swelling or bursting.

Front

Explain facilitated diffusion.

Back

Facilitated diffusion is a type of passive transport where molecules move across the cell membrane through protein channels or carriers, without the use of energy.

Front

What is the function of the cell membrane?

Back

The cell membrane controls what enters and leaves the cell, provides structural support, and facilitates communication with other cells.

Front

What is the difference between diffusion and osmosis?

Back

Diffusion is the movement of any molecules from an area of higher concentration to an area of lower concentration, while osmosis specifically refers to the movement of water.