go to section: chapter 10 cell division. go to section: interest grabber getting through materials...

Go to Section:

Chapter 10Cell Division

Go to Section:

Interest Grabber

Getting Through

Materials move through cells by diffusion. Oxygen and food move into cells, while waste products move out of cells. How does the size of a cell affect how efficiently materials get to all parts of a cell?

Section 10-1

1. Which would be more efficient and use less energy?

Delivering food by foot all across Athens or delivering food by foot only in Athens High School?

Why?

Go to Section:

Cell Size

Surface Area (length x width x 6)

Volume (length x width x height)Ratio of Surface Area to Volume

Ratio of Surface Area to Volume in CellsSection 10-1

Go to Section:

Interest Grabber

Cell Cycle

The cell cycle represents recurring events that take place in the period of time from the beginning of one cell division to the beginning of the next. In addition to cell division, the cell cycle includes periods when the cell is growing and actively producing materials it needs for the next division.

Section 10-2

1. Why is the cell cycle called a cycle?2. Why do you think that it is important for a cell to grow in size during its

cell cycle?3. What might happen to a cell if all events leading up to cell division took

place as they should, but the cell did not divide?

Go to Section:

Section Outline

10–2 Cell DivisionA. ChromosomesB. The Cell CycleC. Events of the Cell CycleD. Mitosis

1. Prophase2. Metaphase3. Anaphase4. Telophase

E. Cytokinesis

Section 10-2

Go to Section:

includes

is divided into is divided into

Concept MapSection 10-2

Cell Cycle

M phase (Mitosis)

Interphase

G1 phase S phase ProphaseG2 phase Metaphase TelophaseAnaphase

Go to Section:

M phase

G2 phase

S phase

G1 phase

Figure 10–4 The Cell CycleSection 10-2

Go to Section:

Centrioles

Chromatin

Interphase

Nuclear envelope

Cytokinesis

Nuclear envelope reforming

Telophase

Anaphase

Individual chromosomes

Metaphase

Centriole

Spindle

CentrioleChromosomes

(paired chromatids)

Prophase

Centromere

Spindle forming

Section 10-2

Figure 10–5 Mitosis and Cytokinesis

Go to Section:

Interest Grabber

Knowing When to Stop

Suppose you had a paper cut on your finger. Although the cut may have bled and stung a little, after a few days, it will have disappeared, and your finger would be as good as new.

Section 10-3

1. How do you think the body repairs an injury, such as a cut on a finger?

2. How long do you think this repair process continues?3. What do you think causes the cells to stop the repair process?

Go to Section:

Control of Cell DivisionSection 10-3

Videos

Click a hyperlink to choose a video.Animal Cell MitosisAnimal Cell Cytokinesis

Click the image to play the video segment.

Video 1

Animal Cell Mitosis

Click the image to play the video segment.

Video 2

Animal Cell Cytokinesis

Links on cell growth Links from the authors on stem cellsShare cell cycle lab dataInteractive test

For links on cell division, go to www.SciLinks.org and enter the Web Code as follows: cbn-3102.For links on the cell cycle, go to www.SciLinks.org and enter the Web Code as follows: cbn-3103.

Go Online

http://www.millerandlevine.com/issues/stem/index.html

http://www.phschool.com/atschool/biology/Dragonfly/activities/phb_sc10_net.cfm

http://www.scilinks.org/

Interest Grabber Answers

1. On a sheet of paper, make a drawing of a cell that has the following dimensions: 5 cm x 5 cm x 5 cm. Your partner should draw another cell about one half the size of your cell on a separate sheet of paper.

2. Compare your drawings. How much longer do you think it would taketo get from the cell membrane to the center of the big cell than from the cell membrane to the center of the smaller cell?It would take twice the amount of time.

3. What is the advantage of cells being small?If cells are small, materials can be distributed to all parts of the cell quickly.


1. Why is the cell cycle called a cycle?It represents recurring events.

2. Why do you think that it is important for a cell to grow in size during its cell cycle?If a cell did not grow in size, each cell division would produce progressively smaller cells.

3. What might happen to a cell if all events leading up to cell division took place as they should, but the cell did not divide?Students may infer that a cell that undergoes all sequences of the cell cycle would grow increasingly larger—to a point at which the cell could no longer exchange materials with the environment efficiently enough to live.


1. How do you think the body repairs an injury, such as a cut on a finger?The cut is repaired by the production of new cells through cell division.

2. How long do you think this repair process continues?Cell division continues until the cut is repaired.

3. What do you think causes the cells to stop the repair process?Students will likely say that when the cut is filled in, there is no room for more cells to grow.

This slide is intentionally blank.

go to section: chapter 10 cell division. go to section: interest grabber getting through materials...

Documents