This document summarizes key concepts in cell physiology including membrane transport, the cell cycle, and protein synthesis. Membrane transport includes passive processes like diffusion, osmosis, and facilitated transport as well as active transport using ATP. The cell cycle consists of interphase, mitosis, and cytokinesis. Protein synthesis involves transcription of DNA to mRNA and translation of mRNA as amino acids are linked to form a protein.

7. Study the diagram below. It represents a container that is divided by a semi permeable membrane. A different solution in its initial state is shown on each side of the membrane. 1. Which substance(s) can move through the membrane? Why? 2. Which direction will the molecule(s) will move? To side I or II? 3. Which substance will move across fastest? 4. How long will the molecule(s) will continue to move?

8. Osmosis - How Cells Respond to Different Solutions 90% H 2 O 10% solute 90% H 2 O 10% solute 90% H 2 O 10% solute 90% H 2 O 10% solute 85% H 2 O 15% solute 95% H 2 O 5% solute Isotonic (no net movement of water) Hypotonic Hypertonic What solution would you give someone who is retaining water?

9. Why shouldn’t you drink ocean water if you are thirsty?

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