Cell Transport

Open Ended

Why is the ability of the cell membrane to monitor the travel of substances across its surface significant for the survival of the cell?

Multiple Choice

Which of the following is NOT a type of passive transport across the cell membrane?

• Simple diffusion

• Osmosis

• Facilitated diffusion

• Endocytosis

Multiple Select

Which of the following are characteristics of diffusion as shown in the slides?

• It is a passive process.

• It requires energy input.

• Molecules move from high to low concentration.

• It involves kinetic energy.

Open Ended

Explain how the process of diffusion is demonstrated using dye in water, as shown in the images.

Fill in the Blank

During diffusion, molecules move from areas of ___ concentration to areas of low concentration.

Multiple Choice

What is osmosis?

• The diffusion of solute across a membrane

• The diffusion of water across a membrane

• The active transport of water across a membrane

• The movement of water from low to high water potential

Multiple Choice

Which type of solution has the same concentration of solutes inside and outside the cell?

• Isotonic solution

• Hypertonic solution

• Hypotonic solution

• Supersaturated solution

Multiple Choice

What is the direction of water movement when a cell is placed in an isotonic solution?

• There is no net movement of water

• Water moves into the cell

• Water moves out of the cell

• Water moves in and out rapidly

Fill in the Blank

A hypertonic solution has a ___ solute concentration than the cell.

Open Ended

Explain what happens to a red blood cell when placed in a hypertonic solution. Use the diagrams to support your answer.

Multiple Select

Which of the following statements are true about a cell in a hypotonic solution?

• Water moves into the cell

• The cell may burst

• The solute concentration outside the cell is lower than inside

• The cell shrinks

Multiple Choice

Which type of solution causes a cell to swell and potentially burst due to water intake?

• Isotonic solution

• Hypotonic solution

• Hypertonic solution

• Supersaturated solution

Open Ended

Compare the effects of placing animal cells and plant cells in a hypertonic solution. What happens to each type of cell and why?

Multiple Choice

Which of the following statements about facilitated diffusion is correct?

• It requires energy in the form of ATP.

• It moves molecules from low to high concentration.

• It uses protein channels to move specific molecules across the membrane.

• It does not require any proteins.

Fill in the Blank

Active transport moves particles ___ the concentration gradient.

Open Ended

Explain the role of the sodium-potassium pump in maintaining cellular homeostasis.

Multiple Select

Select all the features that apply to active transport.

• Requires energy (ATP)

• Moves particles from high to low concentration

• Uses carrier proteins or pumps

• Moves particles against the concentration gradient

Multiple Choice

Which process involves moving things out of the cell by vesicles that fuse with the plasma membrane?

• Exocytosis

• Endocytosis

• Pinocytosis

• Phagocytosis

Multiple Select

Which of the following statements about endocytosis are correct?

• It involves the cell membrane folding inward to form a pocket.

• It is used to bring large molecules into the cell.

• It is the process by which hormones are secreted out of the cell.

• It can occur in three different forms.

Fill in the Blank

The most common form of endocytosis that takes in dissolved molecules as a vesicle is called ___.

Open Ended

Explain how receptor-mediated endocytosis differs from other forms of endocytosis.

Multiple Choice

Which type of endocytosis is responsible for engulfing large particles such as bacteria into vesicles?

• Pinocytosis

• Phagocytosis

• Receptor-mediated endocytosis

• Exocytosis

Open Ended

Reflecting on what you learned about passive transport, how do the different types of passive transport help maintain homeostasis in cells?

Multiple Choice

What is the main difference between passive transport and active transport across the cell membrane?

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

• Passive transport moves substances from low to high concentration, while active transport moves from high to low.

• Passive transport requires no energy and moves substances from high to low concentration, while active transport requires energy and moves substances from low to high concentration.

• Both passive and active transport require energy.