1. Wake-up 1.Examine the gel to the right. What do the bands represent? 2.Which fragment is the longest, A or B? Explain. 3.Which fragment is the shortest, A or B? Explain. 4.Who is guilty of the crime? A B

3. Stem Cells Christopherson Watch in presentation mode

4. What are stem cells? Cells from which all other cells with specialized functions are generated

5. Review Cells: Eukaryotic Animal Cell Plant Cell

6. Red Blood CellsRed Blood Cells: Watch the video and describe their shape and movement.

7. RBC Function Transports oxygen throughout organisms; Shape allows for more surface area for oxygen attachment

8. Common Object Most Similar To.. Oxygen Tank

9. Muscle CellsMuscle Cells: Watch the video and describe their shape

10. Muscle Cell Function Stretches and contracts like a rubber band; allows muscles to contract and retract

11. Common Object Most Similar To.. Rubber Band

12. Nerve Cells: Nerve Cells: Watch the video and describe their shape

13. Nerve Cell Function Conducts messages throughout organisms

14. Common Object Most Similar To.. Electric powerline

15. Sperm CellsSperm Cells: Watch video and describe their shape

16. Sperm Cell Function Possesses a tail; allows for movement to the egg

17. Common Object Most Similar To.. Motor boat

18. Specialized Cells Have been differentiated: Each cell has a different function

19. How are Stem Cells different? Unspecialized cells that can constantly renew themselves through cell division

20. How are Stem Cells Different? Can be induced to become specialized cells with specific functions

21. Two types: Adult Stem Cells Undifferentiated cell found in certain tissues and organs; function is to maintain and repair the tissue where they are found.

22. Two types: Embryonic Stem Cells Undifferentiated cells found in embryos that developed from eggs that have been fertilized artificially in a lab Donated for research.

23. Adult Stem Cells vs. Embryonic Stem Cells Embryonic stem cells have the ability to develop into almost every type of cell in the human body Adult stem cells may only develop into a limited number of cell types. Watch Video

24. Embryonic Stem Line (Watch Video)Embryonic Stem Line A group of constantly dividing stem cells; product of just one cell

25. Why do we care about Stem Cells? Watch Video

26. Why do we care about stem cells? Increase an understanding of how diseases occur if have “sick” cells, can watch them mature to see what occurs.

27. Why do we care about stem cells? Generate healthy cells to replace diseased cells

28. Why do we care about stem cells? Test new drugs Instead of testing on living organisms, tests can be performed on specific cells generated by stem cells

29. Stem Cell Controversy