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Passive Transport: Diffusion and Osmosis

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Passive Transport: Diffusion and Osmosis

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Questions and Answers

Passive transport is the movement of substances:

Down a concentration gradient (correct)

Requiring input of energy

Against a concentration gradient

Involving chemical reactions

Osmosis is a type of:

Diffusion (correct)

Facilitated diffusion

Active transport

Endocytosis

Which of the following factors does NOT influence the rate of diffusion?

Temperature

Mass of the molecule

Surface area of the membrane (correct)

Concentration gradient

In the context of diffusion, what happens when the temperature increases?

The kinetic energy of molecules increases, enabling faster movement Signup and view all the answers

Which of the following statements about diffusion is correct?

Diffusion is important for cellular respiration Signup and view all the answers

What is the primary driving force for passive transport?

Concentration gradient Signup and view all the answers

What happens when a plant cell is surrounded by a hypotonic solution?

Water will move into the vacuole, causing the cell to swell and become turgid. Signup and view all the answers

Which statement about microvilli in cells is true?

Microvilli increase the surface area for absorption by forming tiny projections. Signup and view all the answers

What is the primary function of turgor pressure in plant cells?

To help the plant cell retain its upright posture and extend its leaves. Signup and view all the answers

What happens when a plant cell is surrounded by a hypertonic solution?

The cell will lose water, causing the plasma membrane to shrink and the cell to become plasmolyzed. Signup and view all the answers

How do animal cells regulate their water balance?

By adjusting the concentration of water in the blood through the brain and kidneys. Signup and view all the answers

Which factor affects the rate of diffusion in cells?

Both the distance and the surface area. Signup and view all the answers