chapter3/part 6

The dividing of preexisting cells to create new cells is

______ is also used to replace damaged cells

events tha occur during a cells life

the cell carries out normal function before preparing to divide

M phase

cell performs specific cell functions

growth and duplication of organelles

each chromosome is copied

growth and production of proteins required of division

What are the two parts of M Phase

Cell nucleus and its contents divide
* chromosomes are evenly distributed between the two new cells

cytoplasm and plasma membrane divide

DNA is divided into two large pieces called

Human somatic cells each contain _____ chromosomes

In _____ chromosomes come in pairs 23 x 2

The two chromosomes copied during the S phase is  called

Anaphase =

The 4 phases of mitosis are

_____ is when the membrane is divided and two daughter cells are formed

the speed at which cells divide

high mitotic rate =
*blood cells
*skin cells

Low mitotic rate = 
*skeletal muscle 
*only divide when they need to replace damaged tissue

No mitotic rate =
*some cells do not divide 
*cardiac muscle/neurons

Proteins that stimulate specific populations of cells to divide more rapidly.

stimulates production of red blood cells

stimulates division of cells in the epidermis 
*accelerates

stimulates growth and division of many cells, esp bone and cartilage