8.3 Cell transport (1)

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How might a cell use exocytosis to maintain homeostasis?

• By increasing the concentration of solutes inside the cell
• By taking in nutrients from the environment
• By expelling waste and regulating hormone levels
• By absorbing water from surrounding cells

What is a key characteristic of exocytosis?

• It expels materials from the cell
• It requires energy only during the intake of substances
• It involves the engulfing of large particles
• It is the process of taking in materials

What can be inferred about a cell that is undergoing rapid exocytosis?

• It is undergoing cell division.
• It is in a state of dehydration.
• It is absorbing nutrients from the environment.
• It is likely expelling waste products.

What is a key difference between exocytosis and endocytosis?

• Exocytosis involves taking in materials, while endocytosis involves expelling materials.
• Exocytosis expels materials, while endocytosis takes in materials.
• Both processes are identical in function.
• Exocytosis requires energy, while endocytosis does not.

Which of the following best describes the process of phagocytosis?

• Cells take in small amounts of liquid
• Cells engulf large particles like bacteria
• Cells transport nutrients across the membrane
• Cells expel waste materials

Which type of endocytosis involves the engulfing of large particles?

• Pinocytosis
• Exocytosis
• Phagocytosis
• Receptor-mediated endocytosis

How does osmosis contribute to cellular balance?

• By allowing all substances to pass freely through the membrane
• By moving water to equalize solute concentrations
• By expelling excess nutrients from the cell
• By actively transporting ions against their concentration gradient

In what way does the semi-permeable nature of the cell membrane affect osmosis?

• It prevents any movement of substances.
• It restricts the movement of water only.
• It allows all substances to pass freely.
• It permits the passage of water while blocking most solutes.

If a cell is placed in a solution with a higher solute concentration than its cytoplasm, what is likely to happen?

• The cell will burst due to excess water intake
• The cell will remain unchanged
• Water will leave the cell, causing it to shrink
• Water will enter the cell, causing it to swell