(7 th ) Chapter 4-4 Cornell Notes Cell Differentiation

Chapter 4-4: Key Questions What is differentiation? Answer 1: ______________________________________________ What factors influence how and when cells differentiate within different organisms? Answer 1: ______________________________________________

Chapter 4-3: Key Terms differentiation- stem cell-

Chapter 4-4 Part 1 Cell differentiation: cell structure changes, special functions/uses; Cells then change from one to another.

Chapter 4-4 Part 1 Question: What kind of cells can differentiate? 1. Skin cells 2. Stem cells 3. Plant cells

Chapter 4-4 Part 2 multicellular organisms start as one cell then cell differentiation causes: cells > tissues > organs>organ systems

Chapter 4-4 Part 2 Problem: place the following types of cell development in order from 1 to 4. Part __: cells Part __: organs Part __: organ systems Part __: tissues

Chapter 4-4 Part 3 During development each cell is fixed/set in how it changes; Cell differentiation happens only when certain sections DNA turned off; It also depends on its DNA, function, type of organism.

Chapter 4-4 Part 3 Summary: What is cell differentiation? 1. The cell divides into two new cells. 2. The cell changes into a new cell based upon the needs of the organism 3. The cell changes to a new type of cell because of mutation.

Chapter 4-4 Part 4 Regeneration: animals grow a lost limb or tail; Examples are reptiles and crustaceans; Humans can’t but do have stem cells; Stem cells differentiate through life as needed..

Chapter 4-4 Part 4 Participation: Please turn to your partner and share a fact about regeneration.

Chapter 4-4 Part 5 Plant cells differentiate much like animal cells; adult plants can keep growing because some root/stem/leaf cells not fixed in development; therefore they can differentiate.

Chapter 4-4 Part 5 Speculation: How is plant cell differentiation different from animal cell differentiation?