Chapter 3: CellsPart IV:

The Cell CycleControl of Cell Division

Stem and Progenitor Cells

The Cell Cycle

• Cell Cycle– 1. – 2.

• Interphase-1.

2. Stagesa.

b.

c.

The Cell Cycle

Cell Cycle

• Mitosis1.

2.

3.

Cell Cycle• Prophase

1.

2

Cell Cycle• Metaphase

1.

2.

Cell Cycle• Anaphase

1.

2.

3.

Cell Cycle• Telophase

1.

2.

Cell Cycle

• Cytoplasmic Division (cytokinesis)1.

2.

3.

Control of Cell Division

• Cells divide at different rates 1.

2.

• Cells in humans

Control of Cell Division

• Telomeres

• # of divisions of a cell 1.

2.

Control of Cell Division

• Other factors also control cell division:1. Size of cell

2. Hormones and Growth factors

3. Space availability

Control of Cell Division

• Tumors: 1.

2.

3. Two typesa.

b.

Control of Cell Division

• Cancer: 1.

2.

3.

• Metastasis

Control of Cell Division

• Characteristics of cancer cells– Pg. 105 Table 3.6

• Treatment1.

2.

3.

Control of Cell Division• Genes and Cancer:

1. Oncogenes

2. Tumor suppressor genes

• Environmental factors 1.

2.

Stem Cells and Progenitor Cells

• Cells come from other preexisting cells.

• Stem cells 1.

2.

• Progenitor cells

Stem cells and progenitor cells

• Totipotent1.

2.

• pluripotent- 1.

2.

Stem and Progenitor Cells

• All cells have

– Exception:

• Each cell type follows

• See Figure 3.42 on pg. 108