FCHS Biology: U2, Topics 4-6 Quiz

What is the main difference between passive and active transport?

• Passive transport moves substances against the concentration gradient

• Active transport requires energy, passive transport does not

• Passive transport uses vesicles, active transport does not

• Active transport only moves water

A cell is placed in a solution with a higher concentration of solutes than inside the cell. What will most likely happen to the cell?

• It will swell

• It will shrink

• It will remain the same size

• It will divide

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Why does active transport require energy?

• It moves substances with the concentration gradient

• It moves substances against the concentration gradient

• It only moves water molecules

• It is a type of passive transport

Which scenario best illustrates the function of the sodium-potassium pump in animal cells?

• Moving water into the cell by osmosis

• Using ATP to move sodium ions out and potassium ions into the cell

• Allowing oxygen to diffuse into the cell

• Facilitating glucose entry without energy

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A cell needs to take in large particles. Which process will it use?

• Diffusion

• Endocytosis

• Osmosis

• Facilitated diffusion

Why is the cell membrane described as "selectively permeable"?

• It allows all substances to pass through

• It blocks all substances from entering or leaving

• It allows some substances to pass while blocking others

• It only allows water to pass through

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What would happen to a red blood cell placed in a hypotonic solution?

• It would shrink

• It would swell and possibly burst

• It would remain unchanged

• It would divide

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A cell is placed in a solution and water moves out of the cell. What type of solution is the cell in?

• Isotonic

• Hypertonic

• Hypotonic

• Neutral

Which of the following best describes the movement of molecules in diffusion?

• From low to high concentration

• From high to low concentration

• Only through protein channels

• Only with the use of energy

Why is osmosis important for cells?

• It helps cells produce energy

• It regulates water balance and maintains homeostasis

• It allows cells to divide

• It synthesizes proteins

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