Cell Transport Review

Diffusion & Facilitated Diffusion are both __________ transport.

• Passive

• Active

• Easy

• Free

Passive Transport is the movement of particles across the membrane from an area of [ ___ ] to an area of [ ___ ]

• high to low

• low to high

• low to low

• high to high

Passive Transport uses ____ energy

• no

• a lot of

• a little bit of

• some

Passive Transport is the movement of particles _________ the concentration gradient.

• down

• against

• opposing

• up

An example of simple diffusion is

• CO₂ and O₂ exchange in the lungs

• Glucose transport

• Na⁺ / K⁺ Pumps

• Exocytosis

An example of facilitated diffusion is

• CO₂ and O₂ exchange in the lungs

• Glucose transport

• Na⁺ / K⁺ Pumps

• Endocytosis

The general name for movement of substances across cell membranes without need of energy input

• passive transport

• active transport

How do the particles move in diffusion?

• From a region of low concentration to a region of high concentration

• From a region of high concentration to a region of low concentration

• From a region of low concentration to a region of low concentration

• From a region of high concentration to a region of high concentration

What is a solute?

• A substance dissolved in another substance

• the substance doing the dissolving

Why is diffusion important?

• Molecules need to be moved out of cells
• Cells need a constant supply of some molecules whilst getting rid of others
• There is no other way of transporting things in or out of a cell
• It requires energy which is always being produced and needs to be used up