Cell Transport

Front

What is a hypertonic solution?

Back

A solution that has a higher osmotic pressure than another solution, with a greater concentration of solutes than the concentration of solutes in the cells, causing water to leave the cell.

Front

What is osmosis?

Back

The diffusion of water across a semi-permeable membrane.

Front

What type of transport moves particles against their concentration gradient?

Back

Active transport.

Front

When a molecule diffuses down a concentration gradient, it moves from an area of ______ concentration to an area of ______ concentration.

Back

High concentration to low concentration.

Front

How are oxygen and carbon dioxide transported across cell membranes?

Back

Through simple diffusion.

Front

What is a hypotonic solution?

Back

A solution that has a lower osmotic pressure than another solution, with a lower concentration of solutes than the concentration of solutes in the cells, causing water to enter the cell.

Front

What is an isotonic solution?

Back

A solution that has the same osmotic pressure as another solution, resulting in no net movement of water into or out of the cell.

Front

Define passive transport.

Back

The movement of substances across a cell membrane without the use of energy, typically along a concentration gradient.

Front

Define active transport.

Back

The movement of substances across a cell membrane against their concentration gradient, requiring energy.

Front

What is facilitated diffusion?

Back

A process by which substances are transported across cell membranes with the help of carrier proteins, without the use of energy.