Understanding Diffusion, Osmosis, and Active Transport

What is the process called when molecules move from an area of high concentration to an area of low concentration without energy input?

• Active transport

• Diffusion

• Osmosis

• Facilitated diffusion

Which of the following is specifically the diffusion of water across a semi-permeable membrane?

• Active transport

• Diffusion

• Endocytosis

• Osmosis

In the osmosis experiment, what is the purpose of calculating the percentage change in mass of the potato cylinders?

• To find out the sugar concentration in the solution

• To measure the rate of diffusion

• To determine the initial mass of the potato

• To understand the effect of osmosis on the potato

What does it mean if the percentage change in mass of a potato cylinder is negative after the osmosis experiment?

• The sugar concentration was too high

• There was no change in mass

• The potato cylinder lost mass

• The potato cylinder gained mass

How does active transport differ from diffusion?

• It involves the movement of water

• It does not require energy

• It moves substances against a concentration gradient

• It only occurs in plant cells