Cell Transport

Front

What is diffusion?

Back

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

Front

What part of the cell regulates what can enter and leave the cell?

Back

The Cell Membrane.

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Front

What happens to a cell in a hypertonic solution?

Back

The cell shrinks because water moves out of the cell to the area of higher solute concentration.

Front

What is osmosis?

Back

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

Front

What is an isotonic solution?

Back

An isotonic solution is one where the concentration of solutes is the same inside and outside the cell, resulting in no net movement of water.

Front

What is a hypotonic solution?

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, causing the cell to swell as water enters.

Front

Why does active transport require energy?

Back

Active transport requires energy because it moves substances against their concentration gradient.

Front

What is the role of the cell membrane?

Back

The cell membrane controls the movement of substances in and out of the cell, maintaining homeostasis.

Front

What occurs during passive transport?

Back

During passive transport, substances move across the cell membrane without the use of energy, typically down their concentration gradient.