Cell Differentiation Flashcards

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1
Q

The human body contains about ___ ________ cells

A

100 trillion

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2
Q

Embryo

A

developmental stage, from which adult organisms are gradually produced. This is where an organism’s cells become more differentiated and specialized for particular function

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3
Q

Differentiation

A

process by which cells become more specialized

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4
Q

What determines the identity of a cell

A

differentiation

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5
Q

Mammals go through a flexible process of in which _____ ______ is controlled by…

A

cell differentiation; factors in the embryo

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6
Q

Have scientists discovered the processes caused by factors in the embryo?

A

no

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7
Q

Blastocyst

A

hollow ball of cells with a cluster of cells inside of it known as the inner cell mass

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8
Q

Do adult cells reach a point in which their differentiation is complete and they cannot become other cells

A

yes (most of them )

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9
Q

What type of cell goes through cell differentiation

A

zygote

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10
Q

A zygote is a _____

A

diploid

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11
Q

Diploid

A

2 sets of chromosomes

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12
Q

Haploid

A

one set of chromosomes

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13
Q

How many steps does cell differentiation have?

A

3

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14
Q

What are the steps of cell differentiation

A

1) Sperm fuses with the egg to form a zygote
2) 3-4 days later the zygote becomes a morula
3) 4-5 days later the zygote becomes a blastula

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15
Q

Cell fate map

A

map that depicts how and when the zygote will specialize into different special cells

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16
Q

Do humans have cell fate maps

A

no bc there are trillions of cells in the human body

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17
Q

How many types of stem cells are there

A

3

18
Q

What are the different types of stem cells

A

totipotent, puripotent, multipotent

19
Q

toti meaning

A

total

20
Q

pluri meaning

A

plural

21
Q

multi meaning

A

multiple

22
Q

potent meaning

A

potential

23
Q

What is an example of a totipotent cell

A

zygote

24
Q

Totipotent cells

A

cells that have the potential to become ANY specialized cell

25
Q

Pluripotent cells

A

cells that have the potential to become MOST specialized cells

26
Q

What is an example of a pluripotent cell

A

embryonic stem cell

27
Q

Where do pluripotent stem cells come from?

A

the inner cell membrane of the blastocyst

28
Q

pluripotent cells cannot become the

A

cells in the placenta

29
Q

Placenta

A

tissues surrounding the embryo

30
Q

What is an example of a multipotent stem cell

A

adult stem cells

31
Q

Multipotent Stem Cells

A

cells that have the potential to become multiple (limited) specialized cells

32
Q

What is the New stem cell research called and what does it stand for?

A

IPSC’s and it stands for Induced Pluripotent Stem Cells

33
Q

IPSC’s

A

a new scientific phenomena in which scientist’s can “turn back the clock” on adult stem cells (multipotent) so they become totipotent cells so embryonic stem cells will no longer be used for stem cell therapy

34
Q

Stem Cell Therapy

A

a therapy (used for some conditions today) which uses stem cells to repair or replace badly damaged cells and tissues

35
Q

What is the ethical problem behind Stem cell therapy

A

there is a political/ethical debate that states that using totipotent (zygotes) cells (which come from embryos) is murdering

36
Q

Morula is a __ cell stage

A

8

37
Q

What do the tissues that surround the embryo do

A

attach it to its mother

38
Q

Stem Cells

A

unspecialized cells from which differentiated cells develop

39
Q

What are stem cells used for

A

they are used to replace cells when they die

40
Q

Do stem cells have a specific job

A

no they are undifferentiated

41
Q

What is an example of a stem cell completing its function in everyday life

A

The intestines replace their lining every four days