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14 Cards in this Set

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2 types of Passive Transport?


Facilitated Diffusion

What is Passive Transport?

Requires no energy and moves down the concentration gradient (high to low)

What is Diffusion?

Particles move across the plasma membrane from high to low concentration. continues until they make equilibrium.

What is Facilitated Diffusion?

Particles move down their concentration gradient from high to low concentration. Particles are charged, and cannot cross the fatty cell membrane (use protein channels)

What is Osmosis?

the flow of water through protein channels from a less concentrated to more concentrated solution. The water dilutes the more concentrated solution.

Types of Osmosis?




What is Hypotonic Osmosis?

The concentration of water molecules is greater outside of cell. Water moves into cell

What is Hypertonic Osmosis?

The concentration of molecules is greater (with salt) outside of cell, molecules leave cell

What is Isotonic Osmosis?

Same H2O concentration inside and outside of cell.

Types of Active Transport?



What is Endocytosis?

the cell membrane pinches around the molecule it wants to bring into the cell, creating a vesicle to transport the contents throughout cell. Uses energy

What is Exocytosis?

the Golgi complex packages larger molecules into vesicles, which will then merge with the cell membrane to release it's contents out of cell.

What is Plasma Membrane?

Called a phospholipid Bilayer, has two layers made of phospholipids. Has proteins to let stuff through.

What is a stem cell?

A cell that can become a cell for any part of you. (ie. can become blood cell, bone cell, brain cell, hair cell, or intestinal cell.)