Cell Transport Notes -Part 1

Multiple Choice

Why is the cell membrane considered essential for maintaining homeostasis in living organisms?

• Because it provides structural support to the cell

• Because it regulates the movement of materials in and out of the cell

• Because it produces energy for the cell

• Because it stores genetic information

Open Ended

Explain how the structure of the cell membrane supports the transport of molecules in and out of the cell.

Multiple Choice

Which of the following molecules can pass freely through the phospholipid bilayer of the cell membrane?

• Oxygen

• Glucose

• Sodium ions

• Sucrose

Multiple Choice

What are the main differences between passive and active transport in cells?

• Passive transport requires energy, while active transport does not.

• Active transport moves substances down the concentration gradient, while passive transport moves substances against the gradient.

• Passive transport does not require cellular energy, while active transport does.

• Active transport only transports nonpolar molecules, while passive transport transports polar molecules.

Multiple Select

Which of the following are types of passive transport?

• Diffusion

• Endocytosis

• Facilitated diffusion

• Osmosis

Open Ended

Describe the process by which substances move down the concentration gradient without the use of cellular energy.

Multiple Choice

Which statement best describes the process of diffusion?

• Solute particles move randomly from an area of high concentration to areas of lower concentration.

• Solute particles move from low concentration to high concentration.

• Solute particles move only with the use of energy.

• Solute particles do not move across membranes.

Multiple Choice

How does the concentration of solute particles change over time in a beaker of water when a lump of sugar is added?

• The concentration increases near the lump and decreases elsewhere.

• The concentration remains the same throughout the beaker.

• The concentration becomes evenly distributed throughout the water.

• The concentration decreases near the lump and increases elsewhere.

Open Ended

Explain how the process of diffusion leads to equilibrium in a solution. Use the example of sugar dissolving in water.

Multiple Select

Which of the following statements about facilitated diffusion is correct? Select all that apply.

• Facilitated diffusion does not require cellular energy.

• Large molecules cross the cell membrane through protein channels.

• Facilitated diffusion moves substances against the concentration gradient.

• Only small molecules can use facilitated diffusion.

Multiple Choice

Which of the following best describes the main difference between diffusion and osmosis as shown in the diagram?

• Diffusion involves the movement of solute molecules, while osmosis involves the movement of solvent molecules across a semipermeable membrane.

• Diffusion requires a semipermeable membrane, while osmosis does not.

• Osmosis moves solute molecules from high to low concentration, while diffusion moves solvent molecules from low to high concentration.

• Both diffusion and osmosis require energy input from the cell.

Multiple Choice

How does the cell membrane contribute to maintaining homeostasis in organisms?

• By allowing all substances to freely enter and exit the cell

• By selectively regulating the movement of materials in and out of the cell

• By preventing any communication between cells

• By storing genetic information

Open Ended

Reflecting on today's lesson about cellular transport and the cell membrane, what is one question you still have or one concept you would like to explore further?