Sci Bio C2 Movement of Substances

Open Ended

Describe the role of diffusion in nutrient uptake and gaseous exchange in plants and humans.

Multiple Choice

Which statement best describes the process of diffusion?

• Movement of particles from high to low concentration

• Movement of particles from low to high concentration

• Movement of particles through active transport

• Movement of particles only in solids

Multiple Choice

What observation from the Rainbow Skittles activity supports the idea that diffusion occurs down a concentration gradient?

• The food colouring spreads evenly throughout the water

• The food colouring remains near the Skittles

• The water changes color only near the Skittles

• The Skittles dissolve completely

Open Ended

Based on the Rainbow Skittles activity, explain how the movement of food colouring demonstrates the concept of diffusion.

Open Ended

Describe what happens when a bottle of perfume is spilled in a room, based on the concept of diffusion.

Multiple Choice

Which of the following is NOT an example of diffusion?

• Perfume spreading in a room

• Sugar dissolving in water

• Oxygen entering the blood in the lungs

• A rock sinking in water

Multiple Select

Which of the following statements about diffusion are correct?

• It involves the movement of particles from high to low concentration.

• It requires energy input from the cell.

• It stops when equilibrium is reached.

• It can occur in gases and liquids.

Open Ended

Explain how the concept of concentration gradient is important in the process of diffusion, using the examples shown in the images.

Multiple Choice

What is the process called when particles move from a region of higher concentration to a region of lower concentration?

• Diffusion

• Evaporation

• Condensation

• Filtration

Multiple Choice

Which of the following best describes concentration?

• The amount of substance within a fixed volume

• The temperature of a solution

• The color of a solution

• The size of the container

Multiple Choice

Which of the following statements about concentration gradients is correct?

• A concentration gradient is the difference in concentration between two regions.

• A concentration gradient is the same as equilibrium.

• A concentration gradient means particles are evenly dispersed.

• A concentration gradient only occurs in solids.

Open Ended

Explain the difference between a concentration and a concentration gradient.

Open Ended

Describe what happens to the distribution of particles as equilibrium is reached.

Multiple Choice

At equilibrium, what happens to the net movement of particles?

• There is no net movement of particles.

• Particles move only to the left.

• Particles move only to the right.

• Net movement increases.

Multiple Choice

Does diffusion require energy?

• Yes, energy is required for diffusion.

• No, energy is required for diffusion.

• Yes, diffusion is an active process.

• No, diffusion is a passive process.

Open Ended

Explain how the diffusion of more than one substance occurs across a permeable membrane, using the diagram as reference.

Multiple Choice

Which of the following best describes the difference between a fully permeable membrane and a partially permeable membrane?

• A fully permeable membrane allows all substances to pass through, while a partially permeable membrane allows only some substances to pass through.

• A fully permeable membrane allows only water to pass through, while a partially permeable membrane allows only gases to pass through.

• A fully permeable membrane blocks all substances, while a partially permeable membrane allows all substances to pass through.

• A fully permeable membrane allows only large molecules to pass through, while a partially permeable membrane allows only small molecules to pass through.

Multiple Choice

Which statement describes the net movement of particles X and Y?

• Both particles move to the left side.

• Both particles move to the right side.

• Particles X move to the left side and particles Y move to the right side.

• Particles X move to the right side and particles Y move to the left side.

Open Ended

Explain why the boy could smell the perfume after a while, based on the concept of diffusion.

Multiple Choice

The steeper the concentration gradient, the ______ the rate of diffusion.

• Faster

• Slower

Multiple Choice

The shorter the diffusion distance, the ______ the rate of diffusion.

• Faster

• Slower

Multiple Choice

The higher the surface area to volume ratio, the ______ the rate of diffusion.

• Faster

• Slower

Open Ended

Describe how oxygen moves from the air in your air sacs into the blood stream.

Open Ended

Describe one adaptation of the red blood cell.

Open Ended

Predict: What will happen to the egg when it is placed in corn syrup?

Open Ended

Observe: What happens to the egg when it is placed in corn syrup?

Open Ended

Explain: Why did the egg shrink in corn syrup?

Multiple Choice

Which of the following processes requires energy input from the cell?

• Diffusion

• Osmosis

• Active Transport

• Facilitated Diffusion

Open Ended

Summarize the main differences between diffusion, osmosis, and active transport as discussed in Chapter 2.