What is passive transport?

• A process that requires energy from the cell

• A process that includes diffusion, facilitated diffusion, and osmosis

• A process that moves substances from low to high concentration

• A process that involves protein pumps

Which of the following is a special type of diffusion involving water?

• Facilitated diffusion

• Osmosis

• Active transport

• Endocytosis

What is the role of osmosis in cells?

• To help cells produce energy

• To maintain the balance of water in cells

• To move ions and molecules through protein pumps

• To remove waste from the cell

What is required for active transport to occur?

• Oxygen

• Water

• ATP

• Diffusion

Which process allows cells to take in large particles by engulfing them?

• Exocytosis

• Diffusion

• Endocytosis

• Facilitated diffusion

What is the function of the sodium-potassium pump?

• To move oxygen into the cell

• To move sodium out of the cell and potassium into the cell

• To maintain the balance of water in cells

• To spread molecules evenly in a space

Which process is essential for nerve cells to send signals?

• Osmosis

• Facilitated diffusion

• Sodium-potassium pump

• Endocytosis

Look at paragraph 6 to find the answer.

How do endocytosis and exocytosis help a cell maintain homeostasis? Use evidence from the paragraph to support your explanation.

2. Look at paragraph 2 to find the answer.

   How does osmosis help cells stay balanced, and what might happen to a cell if osmosis did not happen? Use facts from the paragraph to explain your answer.

Look at paragraph 5 to find the answer.

What do protein pumps do in active transport, and why are they important for nerve cells? Use details from the text to support your answer.