Cells and Organelles!

Agenda: 
1.) Hand in UP 9-14
2.) Take out organelle chart and stampsheet
3.) Notes on organelles
4.) Work on colorcode/annotations

The first thing we did in class today was to hand in the UP 9-14 lab that we worked on last week. Then, Mrs. Stein checked our organelle chart and gave us two Elmo stamps on our stampsheet.

Next, we quickly reviewed the differences of a plant and animal cell. Remember that a plant cell has a cell wall, chloroplasts, and a large centrical vacuole, while an animal doesn't. An animal cell does contain a centriole, though, while a plant cell doesn't. The most important hings that both cells have in common is that they both contain DNA, have cyotoplasm, and a cell membrane.

We also took notes on the nucleus, ribosomes, the endoplasmic reticulum (ER), golgi bodies, and chloroplasts. 

Nucleus 

The nucleus contains DNA and the instructions for making proteins. A nuclear membrane surrounds the nucleus and has pores that allow materials to pass through the membrane. Inside the nucleus, DNA is stored in the form of chromatin. During mitosis, chromatin condenses into chromosomes. The nucleolus is found in the center of the nucleus and is the site of ribosomes assembly. It is made out of RNA and protein.

Model of a cell's nucleus

Ribosomes and ER 

Ribosomes are in charge of making proteins. They can be found floating in cytoplasm or they can be attached to the ER. The ER transports materials through the cell and is the site of lipid assembly. There are two types of ER. There's rough ER and smooth ER. Rough ER is involved in the transportation of ribosomes and they are attached to the outside of it. Smooth ER doesn't have ribosomes attached to its surface  and is mostly involved in lipids. 

A model of ribosomes and the ER

Golgi Apparatus 

 The golgi body sorts, modifies, and packages proteins and other materials. It receives materials from the ER and them ships them to specific places in the cell. They're like the UPS guys of the cell.

A model of the Golgi body 

 

Chloroplasts 

Chloroplasts can only be found in the plants and algea. It's the site of photosynthesis where light energy is converted into chemical energy. Chloroplasts also contain chlorophyll which gives the cell its green color. 

After we finished taking our notes, we started working on the colorcode worksheets that Mrs. Stein gave us. We were supposed to annotate it, and then color in the organelles according to the what it says. Remember to also shade in the titles of the color you used, so that it'll be easier for Mrs. Stein to grade. 

Our homework for tonight is: 

1.) the colorcodes (due Wed.) 

2.) Read pgs. 226-228/ pgs. 250-251 and do a seperate "check my understanding" for each 

3.) Quiz Wed. 

The next scribe will be Ashley