Unit 1 Concept 2 Review

The movement of molecules across the cell membrane that doesn't require extra energy, moving down the concentration gradient.

• Active transport

• Simple diffusion

• Facilitated diffusion

• Passive transport

The movement of molecules across the cell membrane that does require extra energy, moving against the concentration gradient.

• Active transport

• Simple diffusion

• Facilitated diffusion

• Passive transport

How do molecules that cannot pass through the membrane on their own move to the other side?

• Active transport

• Simple diffusion

• Facilitated diffusion

• Passive transport

In a(n) _______________ solution, water moves out of the cell, causing the cell to shrink.

• Isotonic

• Hypotonic

• Hypertonic

• Osmotic

In a(n) _______________ solution, water moves into the cell, causing the cell to swell.

• Isotonic

• Hypotonic

• Hypertonic

• Osmotic

In a(n) _______________ solution, water moves equally in both directions into and out of the cell.

• Isotonic

• Hypotonic

• Hypertonic

• Osmotic

Passive transport includes _______________.

• All of the above

• simple diffusion

• facilitated diffusion

• osmosis

Active transport includes _______________.

• All of the above

• molecular pumps

• endocytosis

• exocytosis

Molecules that bind to other molecules (receptor proteins) for signaling purposes.

• Inhibitor

• Second messenger

• Effector

• Ligand

Uses energy and vesicles to move particles out of the cell.

• Endocytosis

• Exocytosis

• Molecular pumps

• Ligand