Moving into and out of the blood: diffusion, osmosis and active transport | Starter Quiz | Oak National Academy

What is the process by which cells release energy?

Answer explanation

Living organisms undergo cellular respiration to provide energy for life processes.

What are the reactants needed for cellular respiration?

• oxygen

• carbon dioixde

• water

• glucose

Answer explanation

Oxygen from the air and glucose from food is needed for cellular respiration.

What gas do red blood cells transport around the body?

• water

• oxygen

• nitrogen

Answer explanation

Red blood cells transport oxygen from the lungs to the body's cells.

Which part of the cell controls what enters and leaves the cell?

• cell wall

• cell membrane

• large permanent vacuole

• nucleus

• chloroplast

Answer explanation

The cell membrane is selectively permeable; that means it only lets certain substances in and out.

Which statement best describes diffusion?

• The net movement of particles from low to high concentration.

• The net movement of particles from high to low concentration.

Answer explanation

This process doesn't require energy. Through random movement over time, the particles will move from areas of high to low concentration.

Which type of blood vessels has a cell wall that is only once cell thick?

• capillaries

• veins

• arteries

Answer explanation

Capillaries allow substances to move from the blood and into cells and vice versa, by providing a short distance for substances to move across.