1. Turn in your cell defense game paper from yesterday if you haven’t already

2. Please go to where your egg and cup and lab reports are!

3. What to do: Pour the water down the drain.
Clean and dry off your egg gently.
Clean and dry off cup.

4. Egg Lab, 4th Day
Weigh the egg and the cup together, then write on your paper:
“Day 4
The weight of our egg and cup is ______ grams.
Our egg looks like _______________________”
Make sure to write the weight of your egg down (on every paper) and write down at least one observation of what the egg looks like (on every paper).

5. Egg Lab, Fourth Day
We’re going to cover our eggs with salt water now. Place your cup and lab papers together on one of the side counters so that it will be safe until next class. Then please return to your seats!

6. Cell Specialization

7. 1. Prokaryotes vs. Eukaryotes
Prokaryotes have NO nucleus, Eukaryotes have a nucleus
Prokaryotes= only unicellular, Eukaryotes= unicellular OR multicellular

8. They have different types of cells
2. How are multicellular organisms different from unicellular organisms?
They have different types of cells

9. 3. Cell Specialization
Cells throughout an organism can develop in different ways to perform different tasks

10. 4. Cell Differentiation
Process by which a cell changes from one cell type to another
5. All cells start as a ‘generic’ cell called a stem cell

11. Stem Cell Research
stem cells – cells of humans that can develop into different cell types

13. Stem Cell Humor

15. 6. Cell Specialization= Same instructions – different jobs
Every cell in your body has the same DNA
Before cells become specialized, they are known as Stem Cells
Early in development, pieces of DNA are switched on or off
The on/off switch determines what kind of cell you’ll make
This is specialization or differentiation

16. 7. Cell Communication
Cells communicate with one another by secreting and receiving chemicals
- 8. Chemicals released by one cell can influence the activity of another cell

17. 9. Communication from hormones tells stem cells what type of cell to become.

18. 10. Cell Specialization
The specific form (structure) of a cell allows it to perform a specific function
– FORM RELATES TO FUNCTION.

19. 11. Specialized cells to know
Find the chart of different cells, we’ll fill this out together

20. They must carry oxygen throughout the body
Blood Cells are small and rounded.

21. Blood cells have to be small and round so they don’t get stuck
Blood cells have to be small and round so they don’t get stuck. Sickle shaped RBCs can cause health problems

22. Variety of blood cells

24. Nerve cells are long and have many branches.
The long branches enable the cells to communicate messages very quickly.

27. Fun Fact:

28. Fun Fact 2: Nerve cells are the slowest to reproduce, skin cells are the fastest

29. Hopefully this joke won’t get on your nerves…

30. Muscle cells are long, thick and packed with mitochondria.
They must be able to shorten (flex) by using lots of ATP!

34. Examples of Cell Specialization
Sperm Cell
- fertilizes egg
- strong tail for quick swimming, distinct head for entering egg cell
- lots of mitochondria for energy to swim

35. Fun Fact:

37. This is a human egg cell. Egg cells aren’t on this list because of sexist reasons. They’re not on the list because they look like normal cells.

38. Plant Cell Specialization:
Xylem to transport water
Phloem to transport food
These are long, thin cells that stretch out

39. In plants, xylem tissue carries water and phloem carries sugar (food)
In plants, xylem tissue carries water and phloem carries sugar (food). They are made of vascular cells.
They must be thin and able to stretch. 4 and 5 are vessels lined with xylem and phloem cells.

42. 12. How are these different cells organized?

43. Levels of Organization
Smallest unit Largest unit
Source: Boundless. “Levels of Organization of Living Things.” Boundless Biology Boundless, 13 Dec Retrieved 14 Feb from 

44. Nothing is “alive” until it’s at least a cell

45. Next steps:
Go to
join.quizizz.com, the code is ) Flip your paper over and complete the webquest (the digital version can be found at shimkoscience.weebly)
3) Turn in your webquest when you finish

46. Exit Ticket Rid itself of wastes Communicate a signal
1. Human sperm cells must move rapidly, using a lot of energy, in order to reach the egg before they die. Based on this information, which organelle would be more abundant in a sperm cell than a skin cell?
A. Chloroplast B. Mitochondria C. Ribosome
2. The nerve cells below secrete neurotransmitters across their membranes. This function of the membrane allows each cell to do what?
Rid itself of wastes
Communicate a signal
Undergo cell division
Release pressure
Chemicals are secreted between two adjacent nerve cells

47. Egg Lab, 4th Day Weigh the egg and the cup together
Fill out your chart with the weight and your observations
Make sure to write the weight of your egg down (on every paper) and write down at least one observation of what the egg looks like (on every paper).

48. Egg Lab, 4th Day Fill this chart out on your paper
What type of solution was the egg placed in?
Mass of
Cup & egg
Observation
of egg after being in the solution
 No solution 1
 Vinegar 2
 Corn Syrup 3
 Distilled Water 4