Cell Transport

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from an area of high concentration to an area of low concentration until they are evenly distributed.

Front

What is osmosis?

Back

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

Front

What does 'high concentration area' mean?

Back

A high concentration area refers to a space where molecules are tightly packed together.

Front

What is equilibrium in the context of cell transport?

Back

Equilibrium is the state where the concentration of substances is equal inside and outside of a cell.

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane using energy, usually against a concentration gradient.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane is a barrier that allows certain substances to pass while blocking others.

Front

What is the difference between isotonic, hypertonic, and hypotonic solutions?

Back

Isotonic solutions have equal concentrations of solutes inside and outside the cell. Hypertonic solutions have a higher concentration of solutes outside the cell, causing water to leave the cell. Hypotonic solutions have a lower concentration of solutes outside the cell, causing water to enter the cell.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves out of the cell, causing it to shrink.

Front

What happens to a cell in a hypotonic solution?

Back

In a hypotonic solution, water moves into the cell, causing it to swell and potentially burst.

Front

What is the role of proteins in cell transport?

Back

Proteins can act as channels or carriers to help transport substances across the cell membrane.