Cell growth/division/cycle

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1

As the length of a cell increases, its _____ increases faster than the _____

volume; surface area

2

What determines the rate at which food and oxygen in a cell are used up and waste products produced

the cells volume

3

How can you obtain a cells ratio of surface area to volume?

Divide surface area by volume

4

T/F As a cell grows in size, its volume increases much more rapidly than its surface area

True

5

What happens to a cells ratio of surface area to volume as the cells volume increases more rapidly that its surface area?

The ratio decreases

6

The process by which a cell divides into 2 new daughter cells

cell division

7

How does cell division solve the problem of increasing size?

It divides forming two daughter cells

8

The division of the cytoplasm

cytokinesis

9

What forms midway between the divided nucleus during cytokinesis in plant cells?

the cell plate

10

In eukaryotic cells what are the 2 main stages of cell division?

mitosis and cytoknesis

11

Each pair of chromatids is attached at an area called the _____

centromere

12

The period of growth in between cell divisions is called

interphase

13

The series of events that cells go through as the grow and divide

cell cycle

14

The division of the cell nucleus during the M phase of the cell cycle is called

mitosis

15

Interphase is divided into what three phases?

G1 phase
S phase
G2 phase

16

Cells increase in size (cell growth)

G1 phase

17

chromosomes are replicated, DNA synthesis takes place (DNA replication)

S phase

18

organelles and molecules required for cell division are produced (preparation for mitosis)

G2 phase

19

What are the 4 phases of mitosis?

prophase, metaphase, anaphase, and telophase

20

What are the two tiny structures located in the cytoplasm near the nuclear envelope at the beginning of prophase?

centriole

21

A fanlike microtubule structure that helps separate the chromosomes

spindle

22

The chromosomes move until they form 2 groups near the poles of the spindle

anaphase

23

The chromosomes become visible. The centrioles take up positions on opposite sides of the nucleus.

prophase

24

A nuclear envelope re-forms around each cluster of chromosomes. The nucleolus becomes visible in each daughter nucleus.

telophase

25

The chromosomes line up across the center of the cell

metaphase

26

the arms of the centromere

chromatid

27

region joining the 2 sister chromatids that make up an x-shaped chromosome

centromere

28

aid in cell division

centriole

29

proteins associated with cell division that are thought to initiate certain processes of mitosis

cyclin

30

What describes cancer
uncontrolled cell growth cells stop growing

uncontrolled cell growth

31

Disorder in which some of the bodys own cells lose the ability to control growth

cancer

32

What happens to the cells at the edges of an injury when a cut in the skin of a break in a bone occurs?

they begin to under go cell division

33

What happens to the rapidly dividing cells when the healing process nears completion?

they slow down and then stop altogether

34

regulate the timing of the cell cycle in eukaryotic cells

cyclins

35

Allow cell cycle to proceed only when certain processes have happened inside the cell

internal regulators

36

Direct cells to speed up or slow down the cell cycle

Include growth factors

Prevent excessive cell growth and keep the tissues of the body from disrupting one another

True about eternal regulators

37

Cancer cells form masses of cells called _____

tumors

38

The chromosomes in the nucleus of the cell make identical copies of themselves

interphase

39

The nuclear membrane disappears and the chromosomes become distinct

prophase

40

The chromosomes more toward and line up along the center of the cell called the equator

metaphase

41

The microtubules pull one set of chromosomes to one side of the cell and an identical set to the opposite side of the cell

anaphase

42

New nuclear membranes form around each of the 2 sets of chromosomes and the cell divides into 2 daughter cells

telophase


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