Cell Transport

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy. It relies on concentration gradients.

Front

What is active transport?

Back

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

Front

Define osmosis.

Back

Osmosis is the movement of water molecules across a semi-permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

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.

Front

What is a semi-permeable membrane?

Back

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

Front

What happens to cells in a hypertonic solution?

Back

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

Front

What happens to cells in a hypotonic solution?

Back

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

Front

What is the role of concentration gradients in passive transport?

Back

Concentration gradients drive passive transport, as substances move from areas of higher concentration to areas of lower concentration.

Front

What is the difference between active and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their gradient.

Front

What is an example of active transport?

Back

An example of active transport is the sodium-potassium pump, which moves sodium ions out of the cell and potassium ions into the cell.