4B: Passive & Active Transport

4B:

Passive

&

Active Transport.

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Passive Transport = NO ENERGY REQUIRED!

Passive Transport = Molecules move from HIGH to LOW concentrations

Passive Transport =

• Diffusion - moving through the plasma membrane

• Facilitated Diffusion - moving through the protein channels

• Osmosis - Movement of water through the plasma membrane.

Active Transport = NEEDS ENERGY TO HAPPEN (ATP)!!

Active Transport = Moves from LOW to HIGH concentrations.

Plasma Membrane Function = To maintain homeostasis and allow molecules to enter and exit the cell.

Mitochondria = where ATP is made! ATP = Energy!

Multiple Choice

Which type of movement across a cells plasma membrane requires energy supplied by ATP??

• Passive Transport

• Simple Diffusion

• Active Transport

• Osmosis

Multiple Choice

What type of transport involves water molecules moving across the plasma membrane from high to low concentration until solute concentrations are equal on both sides of the plasma membrane?

• Osmosis

• Active Transport

• Facilitated Diffusion

Multiple Choice

How does the plasma membrane contribute to the maintenance of cellular homeostasis?

• Controls materials that enter and exit the cell.

• Converts ATP to glucose for energy storage.

• Catalyzes protein synthesis.

• Receives signals for DNA replication.

Multiple Choice

If the concentration of water is greater outside the cell than it is inside the cell, what will happen to the vacuole?

• The vacuole will expand.

• The vacuole will shrink.

• Nothing will happen to the vacuole.