Cell Transport

Chris French, James Graessle, Mo Hnaino, Megan Pokal

Vocab

• Diffusion: Process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated.

• Passive Transport: Movement of material down the concentration gradient.

• Active Transport: Energy-requiring process that moves material across a cell membrane against a concentration difference.

• Osmosis: Diffusion of water through a selectively permeable membrane.(passive)

• Endocytosis: Process by which a cell takes material into the cell by infolding of the cell membrane.(active)

• Exocytosis: Process by which a cell releases large amounts of material.(active)

• Isotonic: When the concentration of two solutions is the same.

• Hypertonic: When comparing two solutions, the solution with the greater concentration of solutes

• Hypotonic: When comparing two solutions, the solution with the lesser concentration of solutes.

• Facilitated Diffusion: Movement of specific molecules across cell membranes through protein channels.

• Channel Protein: Form channels to allow specific molecules to flow through.

• Carrier Protein: Change shape to allow a substance to pass through the membrane.

Cell Membrane

Simple Diffusion

Facilitated Diffusion-Channel

Facilitated Diffusion-Carrier

Osmosis

Endocytosis

Exocytosis

Hypotonic, Isotonic, and Hypertonic Solutions

10 Review Questions

• 1. Diffusion of water through a selectively permeable membrane.– Faciliated– Osmosis– Endocytosis

Process by which a cell takes materials into the cell by an infolding in the cell membrane.

A. diffusionB. endocytosisC. osmosis

3. The solution with the lesser concentrated of solutes.

A. ElectronsB. HypotonicC. Isotonic

4. The process by which molecules move from an area of high concentration to low concentration.

A. DiffusionB. Atom C. Gene

5. the movement of material down the concentration gradient requires. No energy from the cell.

A. Isotonic TransportB. Active TransportC. Passive Transport

6. When the concentration of two slotuions is the same.

A. IsotonicB. Endocytosis C. Osmosis

7. Cells have genetic material that is not contained in a nucleus.

A. Eukaryotes B. Nucleus C. Prokaryotic

8. Cells contain a nucleus in the which their genetic material is separated from the rest of the cell.

A. CytoplasmB. Eukaryotic C. Multicellular organism

9. What regulates what enters and leaves the cell and also provides protection and support?

A. Lipid Bilayer B. Cell MembraneC. Cell wall

10. The composition of nearly all cell membranes is a double-layered sheet.

A. Lipid Bilayer B. Cell Wall C. PlantD. Atom

Answers to Review

1. B 2. B3. B4. A5. C6. A7. C8. B9. B10. A