Interest Grabber
Section 10-1
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?
Work with a partner to complete this activity.
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 take
to get from the cell membrane to the center of the big cell than from the
cell membrane to the center of the smaller cell?
3. What is the advantage of cells being small?
Go to
Section:
Section Outline
Section 10-1
10–1
Cell Growth
A. Limits to Cell Growth
1. DNA “Overload”
2. Exchanging Materials
3. Ratio of Surface Area to Volume
4. Cell Division
Go to
Section:
Ratio of Surface Area to Volume in Cells
Section 10-1
Cell Size
Surface Area
(length x width x 6)
Volume
(length x width x height)
Ratio of Surface Area
to Volume
Go to
Section:
Interest Grabber
Section 10-2
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.
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
Section 10-2
10–2
Cell Division
A.
B.
C.
D.
Chromosomes
The Cell Cycle
Events of the Cell Cycle
Mitosis
1. Prophase
2. Metaphase
3. Anaphase
4. Telophase
E. Cytokinesis
Go to
Section:
Concept Map
Section 10-2
Cell Cycle
includes
Interphase
M phase
(Mitosis)
is divided into
is divided into
G1 phase
Go to
Section:
S phase
G2 phase
Prophase
Metaphase
Anaphase
Telophase
Figure 10–4 The Cell Cycle
Section 10-2
G1 phase
M phase
S phase
G2 phase
Go to
Section:
Figure 10–5 Mitosis and Cytokinesis
Section 10-2
Spindle
forming
Centrioles
Nuclear
envelope
Chromatin
Interphase
Centromere
Chromosomes
(paired chromatids)
Prophase
Cytokinesis
Go to
Section:
Spindle
Centriole
Telophase
Nuclear
envelope
reforming
Centriole
Individual
chromosomes
Anaphase
Metaphase
Figure 10–5 Mitosis and Cytokinesis
Section 10-2
Spindle
forming
Centrioles
Nuclear
envelope
Chromatin
Interphase
Centromere
Chromosomes
(paired chromatids)
Prophase
Cytokinesis
Go to
Section:
Spindle
Centriole
Telophase
Nuclear
envelope
reforming
Centriole
Individual
chromosomes
Anaphase
Metaphase
Figure 10–5 Mitosis and Cytokinesis
Section 10-2
Spindle
forming
Centrioles
Nuclear
envelope
Chromatin
Interphase
Centromere
Chromosomes
(paired chromatids)
Prophase
Cytokinesis
Go to
Section:
Spindle
Centriole
Telophase
Nuclear
envelope
reforming
Centriole
Individual
chromosomes
Anaphase
Metaphase
Figure 10–5 Mitosis and Cytokinesis
Section 10-2
Spindle
forming
Centrioles
Nuclear
envelope
Chromatin
Interphase
Centromere
Chromosomes
(paired chromatids)
Prophase
Cytokinesis
Go to
Section:
Spindle
Centriole
Telophase
Nuclear
envelope
reforming
Centriole
Individual
chromosomes
Anaphase
Metaphase
Figure 10–5 Mitosis and Cytokinesis
Section 10-2
Spindle
forming
Centrioles
Nuclear
envelope
Chromatin
Interphase
Centromere
Chromosomes
(paired chromatids)
Prophase
Cytokinesis
Go to
Section:
Spindle
Centriole
Telophase
Nuclear
envelope
reforming
Centriole
Individual
chromosomes
Anaphase
Metaphase
Figure 10–5 Mitosis and Cytokinesis
Section 10-2
Spindle
forming
Centrioles
Nuclear
envelope
Chromatin
Interphase
Centromere
Chromosomes
(paired chromatids)
Prophase
Cytokinesis
Go to
Section:
Spindle
Centriole
Telophase
Nuclear
envelope
reforming
Centriole
Individual
chromosomes
Anaphase
Metaphase
Interest Grabber
Section 10-3
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.
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:
Section Outline
Section 10-3
10–3
Regulating the Cell Cycle
A. Controls on Cell Division
B. Cell Cycle Regulators
1. Internal Regulators
2. External Regulators
C. Uncontrolled Cell Growth
Go to
Section:
Control of Cell Division
Section 10-3
Go to
Section:
Figure 10–8 Effect of Cyclins
Section 10-3
The sample is injected
into a second cell in G2
of interphase.
A sample of
cytoplasm
is removed
from a cell
in mitosis.
As a result, the second
cell enters mitosis.
Go to
Section:
Videos
Click a hyperlink to choose a video.
Animal Cell Mitosis
Animal Cell Cytokinesis
Video 1
Animal Cell Mitosis
QuickTime™ and a
decompressor
are needed to see this picture.
Click the image to play the video segment.
Video 2
Animal Cell Cytokinesis
QuickTime™ and a
decompressor
are needed to see this picture.
Click the image to play the video segment.
Go Online
Links on cell growth
Links from the authors on stem cells
Share cell cycle lab data
Interactive 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.
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 take
to 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.
Interest Grabber Answers
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.
Interest Grabber Answers
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.