Active Transport

What are two reason a cell uses active transport?

• Molecules are to large to pass through lipid bilayer

• Phospholipid head repels water

• cell need to move from lower to higher concentration against the gradient

What are the transport proteins used in active transport called?

• transport proteins

• pump proteins

What is an example of a process in which animal cells must move molecules across the cell membrane against their gradient?

• active transport

• diffusion

• passive transport

• facilitated diffusion

Animal cells need a greater concentration of ___ INSIDE the cell than out side the cell and a greater concentration of ___ OUTSIDE the cell than inside the cell.

• Na (sodium); K (potassium)

• K (potassium); Na (sodium)

In one cycle of the Na/K pump ____ ions of ____ are transported out of the cell and then ___ ions of ____ are transported into the cell.

• 3; Na; 2; K

• 2; Na; 3; K

• 2; K; 3; Na

• 3; Na; 2; K

_______ and ______ are two ways the cell can "take it" or "get rid of" very large particle that cannot go through the membrane.

• endocytosis

• diffusion

• osmosis

• exocytosis

____ TAKES IN large particles by surrounding it with the cell membrane and enclosing it in the cell membrane into a vesicle that pinches off of the cell membrane inside the cell.

• Exocytosis

• Endocytosis

• Osmosis

• Diffusion

What are the three types of endocytosis?

• Pinocytosis

• Phagocytosis

• Turgorcytosis

• Receptor-mediated

What type of endocytosis takes in large solid particles?

• Pinocytosis

• Phagocytosis

• Receptor-mediated

Which type of endocytosis takes in dissolved particles (liquid)?

• Phagocytosis

• Pinocytosis

• Receptor-Mediated