Cell City Essay Example | Topics and Well Written Essays - 1500 words

Cell City - Essay Example Cells can be structurally divided into two groups i.e. the prokaryotes and the eukaryotes. The basic difference between these two groups is that eukaryotes contain a nuclear membrane which surrounds the nucleus and the materials embedded in it whereas in prokaryotic cells the genetic material inside the nucleus is not surrounded by a membrane. The cells present in animals and plants are eukaryotic whereas the cells in bacteria, cyanobacteria, and mycoplasmas are prokaryotic. Organelles are part of cells which work together to complete the functions of the cells. As plant and animal cells are eukaryotic this essay would revolve around the eukaryotic cells only. The eukaryotic cells, in other words, have membrane-bounded organelles. Its constituents are the plasma membrane, Endoplasmic Reticulum, Ribosomes, Mitochondria, Golgi Apparatus, Lysosomes, Nucleus, Flagella, Cilia, Cell wall, Chloroplast, and vacuoles. The animal cells and plant cells have a difference of cell wall, vacuoles, and chloroplasts. The cell functions as a city to complete its functions. All the organelles work together just like in a city with collaboration so that the city is clean and everything goes on smoothly. These are the organelles of the cell which function together to produce qualitative results. The cell membrane is a very important structure which forms the outer covering of the cells. Its integrity and normal working are essential for the proper functioning of the human body as well as the carrying out of normal metabolic functions.... The main components of the cell membrane are the lipids and the proteins with the proteins forming a major component of the membrane. Fifty five percent of the cell membrane is constituted by proteins. That is for approximately fifty molecules of lipids, there is one protein molecule present. The proteins have a very important role to play in maintaining the shape of the cell membrane which is crucial for maintaining the form and working of the cell as well. Similarly in cities if these authorities let everyone enter the city then the integrity of the city can be put at stake. Proteins also have the ability to work as pumps for the passage of ions by the process of active transport which works against the normal diffusion gradient. They also act as carriers and work in moving substances by the process of facilitated diffusion which involves the movement of secondary substances in association with proteins for the purpose of transport. Glycolipids and glycoproteins also fulfill the fu nctions of the authorities in the city (1; 2; 7). Cytoplasm Cytoplasm is a fluid like substance inside the cell which has many proteins, electrolytes and glucose. It has different organelles embedded in it which function together to perform the city functions. Cytoplasm in a real city can be referred to as the land where different authorities are working together. When someone builds places on the land then the spaces of the land become hidden to anyone’s view and the same happens with the cytoplasm in which the organelles take the role of the places built in the city (3; 5; 7). Endoplasmic Reticulum The endoplasmic reticulum is a broad vesicular structure which contains of the endoplasmic matrix. Substances