The cytoplasm is the jelly substance that fills the inside of the cell. It is mostly made up of water. The Golgi bodies export proteins and carbohydrates from the cell. There are two kinds of endoplasmic reticulum. They are rough and smooth bodies that are in the cytoplasm.
The cytoplasm is also where nutrients are absorbed and processed and is where many chemical reactions take place. Cytoplasm This is a semi-fluid material likened to a gel. It holds together the organelles, apart from the nucleus of the cell and supports the cells structure to make it possible for molecules to be transported. The cytoplasm is also where nutrients are absorbed and processed and is where many chemical reactions take place. Mitochondrion Mitochondria are concerned with energy release.
It is also known as the powerhouse. | | Cell Walls | Cell Walls are a outer protective layer for cells. | | Lipid Bi-layer | The Lipid Bi-layer is apart of the cell membrane that acts as a barrier. And only let certain molecules and and others out. |
P1- Describe the microstructure of a typical animal cell and the functions of the main cell components. The microstructure of a typical animal cell consists of a plasma membrane which is made up of two phospholid molecules, proteins and cholesterol. They form a lipid bilayer which is semi-permeable allowing only certain molecules to diffuse across the membrance. Cholesterol helps ‘to stiffen plasma membranes and is not found in the membranes of plant cells.’ Bailey, About.com. The nucleus regulates all cell activity and is bounded by a double membrane called the nuclear envelope, this membrane separates the contents of the nucleus from the cytoplasm.
A cell membrane is important as it encloses all the contents within a cell. The cell membrane regulates what goes into and out of the cell. It expels waste and protects the cell from viruses. It allows the cell to receive nutrients and water. 4.
P2 Outline the Main Tissues Of The Body Epithelial Epithelial tissue is basically the linings of both the internal and external surfaces of the body and can be divided into two groups. The groups depend upon the number of layers of which it is composed. These two groups are simple epithelial and compound. Simple squamous are thin, flat plates and their main function is osmosis (which is the passage of water molecules from a region of low concentration to one of high concentration through a semi-permeable membrane) and diffusion (which is the passage of molecules from a high concentration to a low concentration). They form the lining of cavities such as the mouth, blood capillaries, heart and lung alveoli and make up the outer layers of the skin.
The protein molecule is able to float in the membrane – part of it is embedded in the membrane, part of it sticks into the cytoplasm, and part of it sticks out into the aqueous environment of the cell. What do you suspect about its structure, including its amino acid sequence, to make it behave as it does? * Examine the diagram of the cell membrane below. Is the diagram a “good” illustration of the fluid mosaic model of the cell membrane? What aspects of cell membrane structure are accurately illustrated by it?
Plant eukaryotic cells are made up differently from animal eukaryotic cells in that they have organelles that allow them to make their own food, their cell membrane is actually a cell wall that is rigid and made of cellulose. The video compares a cell to a city. They both have geographic limits, ruling government, power plants, landscape and roads, waste treatment plants, police force, industry, highways and all the things that a blooming city and a cell need to grow and function. 1. Robert Hooke – British Scientist who discovered cells.
Also, plant cells can be bigger than animal cells (plant cells: 10-100 micrometers, animal cells: 10-30 micrometers). Plant cells have one big vacuole, and animal cells have a bunch of small vacuoles. Plant cells also have a cell wall and chloroplasts, while animal cells don’t have either, and animal cells have lysosomes while plant cells do not. Chloroplasts make food for the plant cell and trap light energy to convert it into food, just as a power plant converts fuel into heat in a factory. The cell wall protects and supports plant cells, just as a night guard protects the entire factory.
Provide physical protection Control permeability Provide sensation Produce specialized secretions There are various specialized types of epithelia. They can be sorted by cell shape and the number of cells between the basement membrane and the exposed surface of the epithelium. The three basic shapes of epithelial are squamous, cuboidal, and columnar. If the basement membrane is only covered by one layer of cells it is called a simple epithelium. If the basement membrane is cover by several layers of cells it is called stratified epithelium.