Cell Transport Assessment

Front

What is diffusion?

Back

The movement of particles from an area of high concentration to an area of low concentration.

Front

Explain the process of diffusion with an example.

Back

Example: The diffusion of oxygen from the alveoli in the lungs into the bloodstream.

Front

Define osmosis.

Back

Movement of water molecules across a semi-permeable membrane.

Front

What is passive transport?

Back

Movement of substances across cell membranes without the need for energy input.

Front

Explain how passive transport differs from active transport.

Back

Passive transport is the movement of molecules across the cell membrane without the use of energy, while active transport requires energy to move molecules against their concentration gradient.

Front

What is active transport?

Back

The movement of molecules across a cell membrane using energy, typically against their concentration gradient.

Front

Give an example of active transport.

Back

The sodium-potassium pump, which moves sodium ions out of the cell and potassium ions into the cell.

Front

What is a semi-permeable membrane?

Back

A membrane that allows certain molecules to pass through while blocking others.

Front

What role does concentration gradient play in diffusion?

Back

Particles move from an area of high concentration to an area of low concentration, following the concentration gradient.

Front

What is facilitated diffusion?

Back

A type of passive transport that uses transport proteins to help move molecules across the cell membrane.