Multicellular Organisms - Mitosis and Stem Cells

Question 1

Mitosis

Answer 1

the process of nuclear divion which results in two identical daughter nuclei (and cells)

Question 2

Stages of Mitosis

Answer 2

1. before mitosis chromosomes are long, thin and invisible
2. chromosomes replicate to produce two ientical chromatids attached at the centromere
3. chromatids line up along the equator of the cell. spindle fibres attach at the centromere
4. spindle fibres shorten pulling the chromatids apart to opposite poles of the cell
5. nuclear membranes form around chromosomes and become invisible again
6. cytoplasm divides making two new daughter cells

Question 3

tissue

Answer 3

is a group of cells specialised to perform a particular function

Question 4

organ

Answer 4

is a structure composed of several different tissues coordinated to perform one or more functions

Question 5

system

in human body (definition)

Answer 5

a group of related tissues and organs make up a system

Question 6

stem cells

Answer 6

an unspecialised animal cell that can turn themselves into a variety of specialised cells when needed

thier function is for growth and repair

Question 7

embryonic

stem cells

Answer 7

a type of stem cell that can develop into all cell types found in the human body

Question 8

tissue

stem cells

Answer 8

a type of stem cell which is only able to turn into one or more specialised cell(s) in which they are located near to in the body