Unit 4: Cell Transport Re-Teach

What is the difference between active and passive transport?

• Active transport requires energy; passive transport does not

• Active transport moves molecules across cell membranes; passive transport does not

• Active transport involves oxygen and water molecules; passive transport does not

• Active transport occurs only in nerve cells; passive transport occurs in all the body's cells

The cell membrane is semi-permeable. What does "permeable" mean?

• Extremely thick

• Extremely thin

• Able to be penetrated

• Able to be broken

Does passive transport use energy (riding a bike down a hill)?

• Yes

• No

Which is true for passive transport (riding a bike down a hill)?

• high to low concentration

• low to high concentration

Which to cell processes are passive transport?

• Diffusion and Exocytosis

• Diffusion and Osmosis

• Endocytosis and Exocytosis

What will happen to cut fruit pieces sprinkled with sugar?

• They will gain water by osmosis

• They will not change

• They will lose water by osmosis

What is osmosis?

• The overall movement of water, through a partially permeable membrane, from a region of low solute concentration to a region of high solute concentration

• The overall movement of water, through a partially permeable membrane, from a region of high solute concentration to a region of low solute concentration

• The overall movement of water, through a partially permeable membrane, from a region of low water concentration to a region of high water concentration

Which process happens against a concentration gradient?

• Diffusion

• Osmosis

• Active transport

Sac within the cytoplasm that is full of fluid; plants have one large; stores food, water, etc.

• vacuole
• cell wall
• lysosome
• ribosome

Tags

NGSS.MS-LS1-2

Gives the cell a rigid, box-like shape; outside of the cell membrane; in plants.

• cytoplasm
• chromatin
• cell wall
• cell membrane