Cell Transport (take-home-test)

Diffusion, active transport, osmosis

Shows the need of cells to take in certain substances from their surroundings (such as glucose, oxygen) and get rid of others (such as carbon dioxide, water).

The cell (surface) membrane can control which chemicals can pass in and out

Diffusion happens because of kinetic energy of the particles. It’s the net movement of particles (molecules, ions) from a place of high concentration to a place of low concentration, i.e. down a concentration gradient. Example: - Carbon dioxide goes from in to out and with the time other way - Oxygen goes from out to in and with the time other way.

The movement of substances against a concentration gradient (when there’s very little of that substance outside), using energy from respiration. Example: human small intestine - some glucose absorbed into cells lining the ine stone by active transport

The net movement of water from dilute solution to a more concentrated solution across the partially permeable cell membrane. Osmosis is important for moving water from cell to cell, e.g. in plant roots

• with concentration gradient • No ATP energy (kinetic energy) • passive transport • no Protein used • carbon dioxide, oxygen

• with concentration gradient • No, ATP energy, (but kinetic energy) • passive transport • Channel Protein • water

• with concentration gradient • No, energy ATP • passive transport • Protein transport • glucose, mineral ions

• against concentration gradient • Yes, energy APT • active transport • pumps, protein transport • glucose, ions (na, k, mg, ca, fe*)

• against concentration gradient • Yes, APT energy • active transport • no protein