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

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

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

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).

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!

Cell Specialization

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

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

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

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

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

Stem Cell Humor

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

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 http://learn.genetics.utah.edu/content/begin/cells/cellcom/

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

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

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

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

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

Variety of blood cells

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

Fun Fact:

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

Hopefully this joke won’t get on your nerves…

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

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

Fun Fact:

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.

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

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.

12. How are these different cells organized?

Levels of Organization Smallest unit Largest unit Source: Boundless. “Levels of Organization of Living Things.” Boundless Biology Boundless, 13 Dec. 2016. Retrieved 14 Feb. 2017 from https://www.boundless.com/biology/textbooks/boundless-biology-textbook/the-study-of-life-1/themes-and-concepts-of-biology-49/levels-of-organization-of-living-things-269-11402/

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

Next steps: Go to join.quizizz.com, the code is 411075) 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

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

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).

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