TODAY'S OBECTIVES

TACM-2

• Students correctly use vocabulary from textbook section 7.3 (phospholipid bilayer, hydrophobic, hydrophilic, concentration, diffusion, osmosis, concentration gradient, solution, solute, solvent, volume, isotonic, hypertonic, hypotonic, net movement, equilibrium; later-facilitated diffusion, simple diffusion, active transport, endocytosis, phagocytosis, exocytosis, turgid, lyse/lysis, crenate plasmolysis]
  • Use symbols like [ ] to represent "concentration"
• Understand solvent movement across a membrane based on descriptions of concentrations of solute and solvent
• Identify, understand and articulate the difference between "quantity" and "concentration" [eg. 1 L of fluid may have more Na ions in it than a blood cell but the 1 L can still have a smaller concentration of Na than a cell which is in solution...]

TACM-3

• Understand the relationship between a cell's environment and the cell's response to its environment for animal cells
• Understand the relationship between a cell's environment and the cell's response to its environment for plant cells

TACM-4

• Understand how to determine amount of solute and solvent needed to make a specified volume of a specified concentration

TACM-5

• Understand how to draw and label 4 specific structures in a phospholipid bilayer (cell membrane)
  • Understand the function of each membrane structure
• Understand how to etermine SA/V ratio for a cell
  • Understand the significance of SA/V to a cell

Textbook Only

• Understand the difference between facilitated diffusion and "simple" diffusion. [See animation p 187 in online textbook]
  • Understand which molecules can cross by simple diffusion
  • Understand which molecules can cross by facilitated diffusion
  • Understand which structures are necessary for facilitated diffusion
• Understand the difference between active transport and "simple" diffusion (or to facilitated diffusion)  [See animation p 188 in online textbook]
  • Understand which molecules can cross by active transport
  • Understand which structures are necessary for active transport
  • Understand 4 kinds of active transport

ANALOGY

• The boundaries of cells provide benefits which help cells funtion and also create problems for cells.
  • Describe at least 2 benefits and at least 2 problems that boundaries create for cells
  • How are boundaries for cells similar in terms of benefits and problems to boundaries around nations or businesses?

CLASS LESSON

1. Students hand in vocabulary lists today.
2. Student make test question and answers for each green "bullet" above (total = 20 questions)
3. Each student must get other students to answer at least 5 of their questions [and those students must clearly attach their name to the document].  The question writer must correct and improve the answer of other students when possible.
4. Be sure to visit the animations on page 187 & 188 in the online textbook about movement across membranes with facilitated diffusion and active transport.
5. Visit this cell membrane tutorial

ASSIGNMENT