Active and Passive Transport Retake Practice

Molecules will tend to spread out from an area of greater concentration to an area of lesser concentration.

• True
• False

Active transport allows a cell to move molecules from an area of low concentration to an area of high concentration.

• True
• False

Even though the concentration of salt is high in some gland cells and low in the blood, these cells can move salt out of blood and into the cells.  This is an example of

• passive transport
• active transport
• diffusion
• osmosis

_____________ allows some things to enter and leave cells, while keeping other things out of the cell.

• Osmosis
• Fermentation
• A selectively permeable membrane
• Metabolism

Which of the following is a job of the cell membrane?

• Regulates which materials enter and leave the cell.
• Breaks apart lipids, carbohydrates, and proteins from foods.
• Stores water, salt, proteins, and carbohydrates.
• Keeps the cell wall in place.

Diffusion is the movement of molecules from

• an area of equilibrium to an area of high concentration.
• an area of low concentration to an area of high concentration.
• an area of high concentration to an area of high concentration.
• an area of high concentration to an area of low concentration.

The diffusion of water across a membrane is called

• equilibrium.
• osmosis.
• facilitated diffusion.
• active transport.

The roots of a plant contain a high concentration of minerals and the soil contains a lower concentration.  The roots absorb minerals from the soil.  This is an example of

• passive transport.
• active transport.
• diffusion
• osmosis

Cells sometimes use energy to transport materials across the cell membrane.  This is called

• photosynthesis
• osmosis
• cellular respiration
• active transport

Which of these cell processes does NOT require energy?

• osmosis
• endocytosis
• active transport
• exocytosis