1. Chapter 5: Cell Growth and Division
MA 2.6 The cell cycle and mitosis in asexual reproduction.
Big Black Book pages

2. *two page notebook format*
Wednesday, October 21, 2015
Do Now:
1) Why do we have to cut our hair and fingernails? Where does the extra hair come from?
2) Read Page 125 Reading Toolbox: Cause and Effect. Do problems 1-3
Topic: Cell Growth and Division
Objectives, language obj:
Describe the stages of the cell cycle.
Compare rates of division in different cell types
Identify factors that limit cell size
Lang. Obj. Use the terms cell cycle, mitosis, stage, parent cell, daughter cell, cytokinesis, and surface to volume ratio orally and in writing, supported by reference text and modeling

3. Why do we have to cut our hair and fingernails
Why do we have to cut our hair and fingernails? Where does the extra hair come from?

4. Read BBB Page 125 Reading Toolbox: Cause and Effect. Do # 1-3
Identify the cause and effect…
1) People often shiver as a result of being cold.
2) The light got brighter, so the pupil of the eye got smaller.
3) If the cell passes the G2 checkpoint, then the cell may begin to divide.

5. Cell Cycle has 4 main stages BBB p 127
What happens?
Checkpoint?
Gap 1 (G1)
Synthesis (S)
Gap 2 (G2)
Mitosis (M)

6. Cells divide at different rates BBB p 128
Cell Type
Approximate Life Span
Skin cell
Red blood cell
Liver cell
Intestine – internal lining
Intestine – muscle and other tissues

7. Cell size is limited BBB p 128-9 Mini lab: Surface to Volume Ratio
Cell size is limited BBB p Mini lab: Surface to Volume Ratio. Answer Compare on page 129.
Build small boxes using small box net
Build large boxes using large box net
Surface area of small box
S.A. =
Volume of small box
V =
Surface to volume ratio
Surface area of large box
S.A. =
Volume of large box
V =
Surface to volume ratio

8. 5.1 Formative Assessment
Answer questions 1, 3, 5, and 6 on BBB page 129.
Answer Student Book Questions for 5.1 on pages , and “Can a cell get too big? Explain” on page 76
SUMMARIZE what you learned today in 3-5 sentences
Homework:
Student Book page 76 Questions 1-6