Cell Membrane Transport Mechanisms

Which molecules can easily pass through the cell membrane via simple diffusion?

• Large polar molecules

• Small non-polar molecules

• Ions

• Proteins

What is facilitated diffusion?

• Movement of molecules from low to high concentration

• Movement of molecules with the help of transport proteins

• Movement of water molecules only

• Movement of molecules using energy

Which type of transport requires energy?

• Simple diffusion

• Facilitated diffusion

• Active transport

• Osmosis

What molecule provides energy for active transport?

• ATP

• Glucose

• RNA

• DNA

The movement of water through a semi-permeable membrane is called ___________.

• active transport

• respiration

• osmosis

• diffusion

Passive Transport

• Does require cell energy

• Does NOT require cell energy

What are the three types of passive transport?

• osmosis, diffusion, active transport

• active transport, facilitated diffusion, osmosis

• diffusion, osmosis, facilitated diffusion

• facilitated diffusion, active transport, diffusion

What is active transport

• A process of a movement of molecules from a high to low concentration that doesn’t use energy

• A process of movement of molecules from a low to high concentration that uses energy

When particles move from areas of high concentration to areas less concentrated, this has taken place.

• diffusion
• mitosis
• endocytosis
• photosynthesis

How does osmosis move through a concentration gradient ?

• Osmosis moves from high to low concentration.

• Osmosis does not involve solute concentration.
• Osmosis moves equally in all directions regardless of concentration.
• Osmosis moves from low to high concentration