Exploring Membrane Transport and Intestinal Absorption

What property allows the plasma membrane to control molecule movement?

• Its impermeability

• Uniform permeability

• Selective permeability

• Its rigid structure

What is the movement of molecules from high to low concentration called?

• Osmosis

• Diffusion

• Active transport

• Facilitated diffusion

What is the main difference between diffusion and facilitated diffusion?

• Diffusion requires energy

• Diffusion can't transport water

• Facilitated diffusion moves molecules from low to high concentration

• Facilitated diffusion uses transport proteins

Which of the following is a form of passive transport?

• The sodium-potassium pump

• Co-transport

• Facilitated diffusion

• Exocytosis

Which process does not require cellular energy?

• Osmosis

• Exocytosis

• The sodium-potassium pump

• Co-transport

How do water molecules typically cross the cell membrane?

• Through transport proteins

• Both B and C

• Active transport

• Directly through the lipid bilayer

What is the role of ATP in active transport?

• It facilitates osmosis

• It moves glucose into the cell

• It provides energy to transport ions

• It is not involved in active transport

What is co-transport?

• Simultaneous transport of two different molecules

• Transport of molecules without energy

• Transport of only potassium ions

• A type of passive transport

How are materials exported from the cell?

• Through the lipid bilayer

• Using the sodium-potassium pump

• Via facilitated diffusion

• By exocytosis

What process involves the plasma membrane forming a vesicle to intake materials?

• Endocytosis

• Osmosis

• Diffusion

• Exocytosis