Cell Wall

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by Tejvir624
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Cell Biology

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Cell Wall

Cell Wall

Secondary WallStructure: The secondary wall is located between the plasma membrane and the primary wall. It contains several laminated layers, each containing a silica crystal matrix. These layers are made from cellulose, xylan (hemicellulose), and lignin (a complex phemolic polymer).Function: This wall functions as a waterproofing coat around cells. The secondary wall supports and protects the cell, while making it waterproof and even capable of becoming a storage place for food.Structure Relating to Function: The tightly packed and repeating layers in the secondary wall give it the trait of being water proof. Since there is cellulose in the wall, food can be stored here and with other polysaccharides occuring in the wall.

Primary WallStructure: This is very thin and flexible with several interconnected matrices composed of cellulose, pectic, and hemicellulose. It's located between the middle lamella and the secondary wallFunction: The primary wall limits the size and growth speed of the cell, making it have the most efficient size as possible. Since this layer is semi-permeable, it allows small molecules and protiens to enter and exit the cell.Structure Relating to Function: The primary wall's matrices have many perforations, which allow it to be semi-permeable. Also the plasmodesmatas, or very small channels, allow the cell wall to communicate by letting signaling molecules out into the environment.

Middle LamellaStructure: Consists of pectin, calcium, and magnesium pectates. This is the outermost layer of the cell wall which is deposited during cytokenesis.Function: The middle lamella serves as a adhesive layer between two cells, which keeps them together.Structure Relating to Function: The pectic polysaccharides in the middle lamella is a "sticky" substance that acts as a glue between two cells.

The cell wall prevents the cell from bursting and lysing under stress. It also prevents many harmful pathogens from entering the cell, thus improving the chances of the cell surviving. Without the cell wall, organisms would have to have a very advanced form of fighting with pathogens and the different kinds of stessful environments the cell is exposed to.

Survival of the OrganismWithout the cell wall the cell would have no protection and support, internally or externally. Any sort of bacteria could get through to the bare cell and destroy it. The cell can also simply burst from the pressure of the vacuole and the environment.

Survival of the EcosystemAn ecosystem depends on many organisms that contain cell walls, especially plants. If the cell wall is removed, most plants would die or just buerst, as mentioned before. This can have devastating effects on the herbivores depending on plants for their energy. Since the herbivores cant get food, they will migrate to other food sources. This would lead to the ecosystem being abandoned or even destroyed.

Survival of the WorldThe lack of energy moving from plants to animals will cause herbivores to go down drastically in numbers. As this happens, omnivores and carnivores will have a harder time finding sources of food. By the loss of food sources, most all species on earth would go extinct, exept for the ones not relying, directly or indirectly, from sources originating from organisms with cell walls.

Linkshttp://www.ccrc.uga.edu/~mao/intro/ouline.htm#Secondary cell wallshttp://employees.csbsju.edu/ssaupe/biol327/lecture/cell-wall.htm

Why you should avoid these organellesEndoplasmic Reticulum: Mutated genes cause misfolded proteins, which can caust many diseases. These diseases include Cystic fibrosis(CF), Cerebral Ischaemia, sleep apnoea, Alzheimer's disease, multiple sclerosis, amyotrophic lateral sclerosis, and the prion diseases.Golgi Apparatus: Fragmentation, aggregation, and the accumulation of misfolded proteins cause diseases such as Alzheimer's disease, Amyotrophic lateral sclerosis, Creutzfeldt-Jacob disease, Parkinson's disease, and Huntington's disease. Plasma Membranes: Changes in proteins attached to the membrane, the ubiquitous lipid bi layer, or the cytoskeleton causes numerous diseases and disorders. Some examples of the diseases include Hyaline Membrane disease, Alzheimers, Cystic Fibrosis, and Duchenne Muscular Dystrophy.Lysosomes: All it takes is one type of enzyme to be dysfunctional to cause a buildup of material in the cell and eventuall killing it. The diseases associated with lysosomes include Batten Disease, Cystinosis, Tey- Sachs, Wolman Disease, and Schindler Disease.Peroxisomes: Mutations in the enzymes or the peroxins used to make peroxisomes can reslut in a wide variety of diseases including Zellweger syndrome, Refsum Disease, Neonatal Adrenoleuodystrophy, and Rhizomelic Chondrodysplasia Punctata.

If ElectedIf the cell wall is elected, it will work in unison with the cell membrane in allowing different substances into the cell. Every organelle will be looked after and cared for. They will thrive and an era of peace and prosperity will dawn on the cytoplasm of the once barren cell. The cell will be like a castle with walls so high that noone will dare challenge the might of this powerful cell, not even the great Virus King with his army, the Bacteria.


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