Thursday, June 14, 2007

Lab Project

Cell: I based my cell off this model below.This is a model of a cell I used several different types of food products. This cell covers all of the major topics. Below I will describe what I covered and what the function is within the cell. Stage one- This is the basic start of the cell. In this picture above you see the plasma membrane, cytoplasm, and some free ribosomes. Sitting in the middle is the nucleus. In the nucleus is the chromatin, nuclear pores, nuclear enevelope.
Stage two- I added the rough endoplasmic reticulum and ribosomes.
Stage three- I added the nucleolus, mitochondrion.
Stage four- I added golgi complex, and the lysosome.

Stage Five- I added Smooth endoplasmic reticulum.

Stage Six- I added the microtubules, and the centriole.

Final Stage- Is the finished cell with every part of it labled.

Each part of the cell work differently, the job of a nucleus is to be the control center of the cell. The nucleus in a human cell has forty-six chromosomes. This stores the instruction of the cell's activity. The nucleus has a membrane called a nuclear envelope. The nucleus is like a vault. It contains the cell's DNA.

The Nucleolus of a cell is the sites of Ribosome Assembly. It consists of RNA, proteins, and ribosome in different synthesis, and DNA.

Cytoplasm is made up of all of a cell's internal contents, so all the organelles except the nucleus. Cytoplasm is composed of 65% water, with as much as a billion molecules contained within the cytoplasm of one single cell. The cytoplasm contains enzymes, and dissolved nutrients like amino acids and sugars.

The cell membrane is one of the many organelles that a cell contains. All cells of mammals hold a nucleus surrounded by a nucleus membrane. Ribosome, composed of RNA and protein, are important organelles. The beadlike ribosome is the site of protein synthesis. Its function is to maintain cells shape by holding all the different parts of the cell in an advanced web.

The microtubules are tubes consisting of two proteins. They control the movement of chromosomes during cell division, the movement of organelles within cytoplasm, and the movement of cilia and flagella. The Golgi apparatus is an extremely important organelle in both plant and animal cells. The Golgi body consists of layers of sacs. These sacs have a very thin membrane. Vesicles are pinching off the edges of the sacs. This organelle has two parts to its function. First, it acts in the modification of lipids and proteins. Secondly, it serves to store and package materials for exportation from the cell. The Golgi body works together with the vesicles. They move back and forth from the organelle to the cell membrane carrying the packaged materials to the outside of the cell. The Golgi body is located near the nucleus of the cell. The function of the endoplasmic reticulum is to transport chemicals between and within cells.


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