Download section_10

BIO 12 - Name: ________________________ Date: March 30, 2017
DUE: April 3/17
Section 10-3 Regulating the Cell Cycle (pages 250-252) – Value 24
Controls on Cell Division (page 250)
1. What happens to the cells at the edges of an injury when a cut in the skin or a break in a
bone occurs? (2 pts)
____________________________________________________________________________
________________________________________________________________________________________
2. What happens to the rapidly dividing cells when the healing process nears completion? (2 pts)
_____________________________________________________________________________________
_____________________________________________________________________________________
Cell Cycle Regulators (page 251)
3. What do cyclins regulate? (2 pts)
_____________________________________________________________________________________
_____________________________________________________________________________________
4. What are internal regulators? (2 pts)
_______________________________________________________________________________________
_______________________________________________________________________________________
5. Circle the letter(s) of each sentence that is true about external regulators. (3 pts)
a. They direct cells to speed up or slow down the cell cycle.
b. They prevent the cell from entering anaphase until all its chromosomes are attached
to the mitotic spindle.
c. They include growth factors.
d. They prevent excessive cell growth and keep the tissues of the body from disrupting
one another.
Uncontrolled Cell Growth (page 252)
6. What is cancer? (2 pts)
7. Complete the flowchart about cancer. (3 pts)
Cancer cells don’t respond to signals that regulate
Cancer cells form masses of cells called
Cancer cells break loose and spread throughout the
Reviewing Key Skills – Section 10-3
8. Applying Concepts Do all cells in the body have the same growth rate? Why or why not? (2 pts)
________________________________________________________________________________
________________________________________________________________________________
9. Posing Questions - Cyclins seems to regulate the cell cycle. What questions might scientists have
asked following the discovery of cyclins? (2 pts)
_______________________________________________________________________________
_______________________________________________________________________________
10. Comparing and Contrasting - What are the similarities and the differences between internal and
external cell cycle regulators? (2 pts)
Similarities:
_________________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________
Differences:
_____________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________
11. Inferring - Describe a situation in the human body that would cause an increase in the rate of cell
division of certain cells, followed by a return to the normal rate of division. (2 pts)
_____________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________
TOTAL VALUE 24