Diffusion, osmosis, and active transport marked review.

What is active transport?

• The movement of particles from an area of LOW concentration to an area of HIGH concentration.

• The movement of particles from an area of HIGH concentration to an area of LOW concentration.

• The movement of particles across a partially-permeable membrane.

• The movement of water molecules.

True or false: Active transport cannot happen without energy

• False

• True

Describe how root hair cells use active transport

• The particles move on their own from an area of LOW concentration to HIGH concentration

• Root hair cells do not use energy to move particles.

• Root hair cells use energy to move the particles from an area of HIGH concentration to LOW concentration

• Root hair cells use energy to move the particles from an area of LOW concentration to HIGH concentration

Why is active transport important in plants?

• They help the plant walk.

• Because they help in photosynthesis

• Because it plants need minerals to grow.

• They do not need active transport.

Explain why cells performing active transport require a lot of energy.

• Lots of energy is needed to move particles up/against the concentration gradient, which is not where they naturally want to go.

• Lots of energy is needed to move particles down the concentration gradient, which is where they want to go.

• Energy is not needed.

Describe how the intestines use active transport. 

• The blood uses active transport to move food particles into the intestines.

• The intestines uses active transport to move food particles into the blood.

• The intestines use active transport to move minerals.

• The intestines use active transport to move around.

The cells of the small intestine have many mitochondria. Explain why they this helps them to function properly.

• The mitochondria help with making food.

• The mitochondria provide energy for active transport, which moves food particles.

• The mitochondria are for photosynthesis.

Define diffusion:

• The movement of water molecules from an area of HIGH concentration to an area of LOW concentration across a partially permeable membrane.

• The movement of particles from an area of LOW concentration to an area of HIGH concentration.

• The movement of particles from an area of HIGH concentration to an area of LOW concentration.

Where does diffusion happen in the body?

• Chloroplast

• Lungs

• Intestines

• Flagellum

What molecule moves in osmosis?

• Carbon

• Particles

• Liver

• Water