Differentiation And Stem Cells Flashcards Preview

Biology- cell biology > Differentiation And Stem Cells > Flashcards

Flashcards in Differentiation And Stem Cells Deck (21):
1

Why do cells differentiate?

To become specialised for their job

2

How is a sperm adapted for swimming to the egg cell ?

-long tail

-stream lined head

-lot of mitochondria for energy

-enzymes to digest through the egg cell membrane

3

How can embryonic stem cells be used to cure diseases?

-make insulin for diabetes

-nerve cells for spinal injuries

4

Why might people be opposed to the use of human embryos in stem cell research?

- embryos are potential human life

-other sources are available

5

What are sperm cells specialised for?

Reproduction

6

What are nerve cells specialised for?

Rapid signalling

7

What are muscle cells specialised for?

Contraction

8

What are root hair cells specialised for?

Absorbing water and minerals

9

What are phloem and xylem cells specialised for?

Transporting substances

10

How are nerve cells adapted for carrying signals ?

-long to cover more distance

-branches connections, so it connects all around the body

11

How are muscle cells adapted for contraction?

-long so space to contract

-lots of mitochondria for energy

12

How are root hair cells adapted for absorbing water and minerals

-give plants a bigger surface area

13

What are the advantages of stem cells?

Contain the same genes so wouldn’t be rejected

14

When do cells differentiate?

-At an early stage for most animal cells

-plant cells don’t ever loose the ability to differentiate

15

What is differentiation ?

The process by which all cell changes become specialised for its job

16

What is a disadvantage of stem cells ?

Stem cells grown in a lab maybe contaminated with a virus

17

What is a stem cell?

An undifferentiated cell of an organism which is capable of giving rise to many more cells of the same type, and form certain other cells

18

Where are stem cells found in adult cells ?

Bone marrow

19

Where are stem cells found in plants ?

Meristems

20

How can stem cells be used in plants ?

-to make disease resistant crops

-to prevent species dying out

21

What are the argument,ent for using stem cells ?

-normally unwanted ones in fertility clinic

-person suffering if more important