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Plasma membrane structure and function in essay
Structure and importance of plasma membranes essay
The plasma membrane of eukaryotic cells is supported by
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1. Nucleus- present only in eukaryotic cells, this structure stores most of the genetic information of the cell. The nucleus directs the production of proteins through the synthesis of mRNA. 2.
1. Cell Membrane - A cell membrane in a cell is like the turnstiles and gates of a baseball stadium. The cell membrane is selectively permeable and the turnstiles or gate only let people with a ticket into the stadium 2. Cell Wall - The cell wall in a cell is just like the support beams of a baseball stadium.
Rationale The cell membrane, also called the plasma membrane is found in all cells and separates the extracellular side of the cell from the cytosolic side (Cell membrane (plasma membrane), 2023). The purpose of the cell membrane is to communicate with the cell’s external environment, to contain the cell’s contents and to control the transport of molecules in and out of the cell. Diffusion is the passive movement of molecules from an area of high to low concentration.
Introduction The plasma membrane is an outer layer that is formed around the cell. It is composed of phospholipids and proteins and this is structure is crucial to all cells in our bodies. The plasma membrane acts as a border and more importantly is responsible for what is allowed to enter and leave the cell. The ability to allow specific molecules to enter and leave the cell is known as selective permeability and it is the phospholipids that make this unique ability possible.
The head of the phospholipid faces towards the water inside/outside of the cell. The middle layer of the membrane consists of the hydrophobic region. They form the lipid tails and they hate water. Since lipids and water does not mix well together, the middle of the phospholipid bilayer does not allow water to go inside. 2.
All these cells float in the liquid plasma, which is mostly water. Plasma also contains nutrients, electrolytes, hormones and protein antibodies to fight infection.
The cell membrane regulates the deoxyribonucleic acid, enzymes, and it builds a pathways for any reaction such as metabolic. When waste products are present the cell membrane gets rid of it and the cell membrane allows important things inside . A great example of what the cell membrane allows in or out is water and oxygen. Specific molecules are only made to enter the cell which is also called semipermeable. Molecules can be passed by active transport or either passive transport.
Explain how different substances are transported across a plasma membrane. You must include simply and facilitated diffusion, osmosis, active transport and bulk transport (endocytosis and exocytosis). Plasma membrane plays a vital role in every the cell by protecting the cell and all cell organelles from its surroundings. Plasma membrane is mainly composed of phospholipids and proteins and it is selectively permeable.
A cell is similar to a Prison. The parts within a Prison have almost all the same factors of a cell, because for example the cell wall of a plant cell has the exact same properties, the cell wall protects the cell from intruders or anything that can harm anything from the inside. The prison fence does exactly the same thing, it protects anything in the inside and keeps intruders out. A Cell Membrane is like the wall of the prison, the Cell Membrane keeps everything in place and keeps all organelles in the cell. The prison relates to this because the walls are meant to keep the prisoners in the prison.
The Nucleus is the most prominent feature of the cell they are commonly found in eukaryotic cells such as animal, plant and fungi. It basically acts as the brain of the cell in which it directs. It is surrounded by vthe nucleus membrane made up of phospholipids that form lipid bilayers. The nuclear envelop assists in controlling the passage of molecules such as the RNA into and out of the nucleus through the nuclear pores. (Bailey, 2015).
One of the roles of a membrane is to is regulate what goes in and out of the cell. There are various types of membrane transporters depending on the substance that is being transported. Active transporters usually transport small molecules such as ions. These transporters are driven by ATP. It moves substances against the concentration gradient.
They are the only eukaryotic cells that contain the flagellum and centriole. In addition to the organelles of the animal cell besides the centriole and flagellum, the plant cells have a cell wall and chloroplasts. Each organelle is very important to every cell. The nucleus controls everything in the cells. They tell everything in the cell what to and when to do it.
On the other hand, eukaryotic and prokaryotic cells both have cell division. A eukaryotic cell has its cell division by binary fission whiles prokaryotic cell has its cell division by meiosis or mitosis. Both eukaryotic and prokaryotic have ribosomes but in prokaryotic cells, they are small and termed (70s), whereas ribosomes in eukaryotic cells are large and termed (80s), which are responsible for decoding
Hello fellow organelles! Vote for me to be the president of the organelle club! For those who don’t know me, i’m the nucleus. I’m proud to say that i’m one of the most important organelles there are in a cell.
The nucleus is generally in the center of a cell. A typical cell nucleus is so small that ten thousand could fit on the tip of a needle. One strand of DNA is around 6 feet long. This mean that 6 feet of DNA fits inside the nucleus, which occupies about 10% of a total cell (https://en.wikipedia.org/wiki/Cell_nucleus), of a microscopic cell. For this to happen eight separate histone protein subunits attach to the DNA molecule to
