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Wednesday, November 17, 2010

cell structure


animal cell: 
Animal cells are mostly eukaryotic cells like the plant cell, which means is it surrounded by the plasma membrane. The plasma membrane is barrier that lets nutrients enter and the waste to leave. There is one nucleus which contains for cell growth and reproduction. The cytoplasm has organelles, its is surrounded by the membrane. The cell walls allow the animal cell to develop to different cell types such as tissues and organs. The cilia and flagella are organisms that move fluids past the immobile cell. The lysosmose breaks down cellular waste.



plant cell:
Plant cells is some what like the animal cell, but they are different in some ways. What I think is cool about the plant cell is that they can make their own food. Chlorophyll give the plant the green color, because it lets the cell use sunlight to convert water and carbon dioxide into sugar and carbs. Plant basically have two types, the vascular and non-vascular. Vascular plants are better because they have xylem. The animal cell has to have protein to get nutrients but the plant cells are able to use inorganic forms, which means they do not need an outside source of protein. The parts in the cell structure basically do the same as the animal cell like and ribosome, nucleus, and so forth. Animal cells don't have rigid cell walls like the plant cell. The plant cell contains are bigger central vacuole. The plant cell form carbon dioxide into sugar and the animal cell has to break down the carbon dioxide to make its energy.

Tuesday, November 16, 2010

lipids and protein

Fats and proteins are insoluble in water. Molecules made up from the combination of one molecule of glycerol with three fatty acids. The purpose of the fat is to serve as a storage system and reserves the supply of energy.During periods of low food consumption, fat reserves in the body can be broken down to release energyFats can be classified as either saturated or unsaturated depending on the structure. Saturated fats having health risks like arteries and heart disease. They are at room temperature. However proteins are polymer of amino acids. Protein is made up of different types of amino acids. Two amino acids bond together and create a long chain. There are two main types of protein in the human body, which are structural protein and functional protein. Structural protein forms a solid material, like hair and tendons. The functional protein helps get out functions in the human body. It occurs in red blood cells, and transports oxygen in the body. There are many different types of protein in the body

Friday, November 12, 2010

Cystic Fibrosis

Cystic fibrosis is an inherited disease. It causes thick, sticky mucus to build up in the lungs and the digestive tract. It is a common lung disease that mostly young adults get, and may lead to death. This disease is caused by an defective gene, that causes the body to produce sticky fluid. The mucus builds up in the breathing passage in the lung. It could also be found in the pancreas. This will result in a lung infection or a serious digestion problem. what causes this problem?... is CF genes. CF genes must be inherited by two parents. 1 in 29 caucasians have Cf genes. Some things that help prevent this disease are antibiotics to help treat the lung infection. There is a flu vaccine that helps to prevent cystic fibrosis. Also a lung transplant could be the only option if it is that bad. Cystic fibrosis is a horrible inherited disease that many people have. 

Thursday, November 4, 2010

cell membrane

All cells are blocks of life, like the cell membrane. the cell membrane forms a barrier between the inside and outside of the cell. While allows the cell to function properly.The inner and outer lays has an hydrophilic phospholipid head, means they are attracted to water. The cell membrane separates a cell from the water because it composes of water insoluble phosholipid and protein.Each cell is made up of different structures It is covering the different organelles of the cell and it's fluids. The membranes are fluid mosaics, which proteins move in layers of lipids. The phosholipid Bilayer is al a fluid portion of the membrane. Each part in the cell has a different and important function within the cell membrane.