Tonicity and Osmoregulation Quiz

What happens to a red blood cell when placed in a hypertonic solution?

• It expands

• It remains the same size

• It turns blue

• It shrinks

Explain why a plant cell placed in a hypertonic solution will lose water and shrink.

• The plant cell will gain water and expand

• The plant cell will remain the same

• The plant cell will explode

• The plant cell placed in a hypertonic solution will lose water and shrink due to the higher concentration of solutes outside the cell.

What happens to a red blood cell when placed in a hypotonic solution?

• It swells and may burst

• It turns blue and expands

• It shrinks and becomes dehydrated

• It remains unchanged

Explain why a plant cell placed in a hypotonic solution will take in water and swell.

• The plant cell takes in water and swells due to the higher concentration of solutes outside the cell in the hypotonic solution.

• The plant cell takes in water and swells due to the lack of water in the hypotonic solution.

• The plant cell takes in water and swells due to the absence of a cell wall in the hypotonic solution.

• The plant cell takes in water and swells due to the lower concentration of solutes outside the cell in the hypotonic solution.

What happens to a red blood cell when placed in an isotonic solution?

• It bursts and releases its contents

• It maintains its normal shape and size

• It becomes larger and swells

• It shrinks and becomes smaller

Explain why a plant cell placed in an isotonic solution will have no net movement of water.

• The concentration of solutes outside the cell is higher than the concentration inside the cell, causing water to move out of the cell

• The concentration of solutes outside the cell is lower than the concentration inside the cell, causing water to move into the cell

• The concentration of solutes outside the cell is equal to the concentration inside the cell, resulting in no net movement of water.

• The concentration of solutes outside the cell is irrelevant to the movement of water in the cell

Describe how animal cells maintain osmoregulation in a hypertonic environment.

• Passively releasing excess ions and solutes, and taking in more ions to balance the concentration gradient.

• Storing excess ions and solutes in vacuoles, and expelling water to balance the concentration gradient.

• Halting all cellular processes to prevent further loss of ions and solutes, and conserving water to balance the concentration gradient.

• Active pumping out excess ions and solutes, and taking in water to balance the concentration gradient.

Explain how plant cells maintain osmoregulation in a hypertonic environment.

• Increasing water intake

• Releasing solutes from vacuoles

• Reducing the size of the cell

• Accumulating solutes in vacuoles

Describe how animal cells maintain osmoregulation in a hypotonic environment.

• Active transport and regulation of solute concentration

• Increased water intake and regulation of solute concentration

• No regulation of solute concentration

• Passive transport and regulation of solute concentration

Explain how plant cells maintain osmoregulation in a hypotonic environment.

• Storing excess water in the cell wall

• Using cilia to pump out excess water

• Releasing excess water through the cell membrane

• Using a central vacuole to store excess water and turgor pressure to maintain cell shape