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Plasma membrane structure and function in essay
Study of plasma membrane
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More handpicked essays just for you.
Plasma membrane structure and function in essay
Study of plasma membrane
Don’t take our word for it - see why 10 million students trust us with their essay needs.
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.
The purpose of the experiment was to determine what happened during osmosis and diffusion across membranes by using a fresh hen’s egg. During the first step, the egg was put into the vinegar. The shell of the egg became soft and started to fall off by small pieces. The reason of the vinegar was able to remove the calcium shell was that the acetic acid in the vinegar could react and dissolve the calcium. The formula for this reaction was CaCO3 + CH3COOH –> Ca + H2O + CO2.
Function - transport Oxygen is breathed into the lungs and is diffused into the blood via the surface of the aveoli in the capillaries and combines with haemoglobin which are in the red blood cells, then forming oxyhaemoglobin. Depending on the concentration of the blood results in the amount of oxygen taken up by the blood to reach equilibrium. Carbon dioxide is carried to the veins via the cardiovascular system where it is diffused into the lungs and then breathed out as a waste product of aerobic processes. Haemoglobin is the component which carries oxygen in red blood cells. It is a protein which can combine with oxygen to form oxyhaemoglobin.
This iron acts in combination with the oxygen molecules, thus accepting it in the lungs. 2. The Red Blood Cell’s shape is actually a byproduct of it not having a nucleus. It’s shape and lack of occupied space inside of it allows for oxygen to be passed through more freely as well as gases to be disseminated in a greater space. 3.
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.
Homeostasis is the tendency within every living organism to maintain balance of its internal conditions in order to survive. Some examples of what our body regulates is hydration level, oxygen level, body temperature, blood pressure, and pH balance. The process of maintaining homeostasis comes from two different feedback loops, which are positive and negative feedback loops. A positive feedback loop brings a even greater change in the same direction, when the body senses a change (Raven). A negative feedback loop acts against the change sensed by the body, in order to retain the regular internal condition (Raven).
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.
A cell is like the white house,It has many areas that work differently and have their own job’s to do just like a cell itself . The gates of the white house can be known as the cell wall because the gates surround the white house protecting it from bad things or people who shouldn’t go into the area or premassis. There are people who make things such as clothing or tools inside the white house so this area can act as the smooth endoplasmic reticulum,as for the rough endoplasmic reticulum,the doors can be referred to this because the doors only let certain people into the white house such as the president and his family,the security guard’s because they need to protect the area from bad people and the senators to discuss their work.
Our cells work together every single hour, minute, and second of our lifetimes to make sure that our bodies are functioning properly, and have the necessary parts that allow for the transport of molecules, substances, and other important chemicals. Each cell is surrounded by a cell membrane, one of the most critically important structures in our body, which protects our cells, maintains homeostasis by controlling transport in and out of the cell, and allows for intercellular communication and signalling. The cell membrane is comprised of several parts that each coincide to aid in the functions it is responsible for, including specific transport proteins, receptors, and channels that are designed to enable various substances necessary for
Identify the different methods to transfer materials from the extra-cellular to the intra-cellular medium. One important fact is extracellular fluid contain a large amount of sodium and chloride ions but only a small amount of potassium whereas for intracellular fluids it is the opposite. iIt should also be noted that intracellular fluid contains a higher concentration of phosphates and proteins compared to extracellular fluid. Transport through the cell membrane occurs by one of two basic processes Diffusion Active Transport Diffusion basically means random molecular movement of substances molecule by molecule through intermolecular spaces in the membrane or with the assistance by combination with a carrier protein.
5. Approaches to model cytoplasmic compartmentalization Cytoplasmic viscosity and hinderance to free diffusion has been modelled in three different ways: 5.1 Concentrated Macromolecular solution Early models assumed the cytosol to be an unstructured dense bag of macromolecules. In these cases, the tracer can essentially diffuse only within the space present between the macromolecules. The DCR (Diffusion Coefficient Ratio, η/ηο) for a tracer particle in a crowded solution will decrease with the tracer radius and will level off at the inverse of relative bulk viscosity (Graph I, Macromolecule Solution) (Luby-Phelps et al., 1988a).
Cellular Respiration One of the main essentials of life that all organisms need in order to function in our world is, energy. We receive that energy from the food that we eat. Cellular respiration is the most efficient way for a cell to receive the energy stored in food. In cellular respiration, a catabolic pathway, which breaks down the molecules into smaller units, in order to produce adenosine triphosphate, also known as, ATP. ATP, is used by cells in the act of regular cellular operations, it is a “high energy” molecule.
The effects of alcohol on Biological Membranes. Introduction In this experiment it will be analysed the damage alcohols can have on biological membranes. Membranes are made up of lipids and proteins. Membranes usually help maintain the balance in a cell as it holds all the cellular materials.
Chlorine dioxide responds specifically with amino acids and the RNA in the cell. It is not clear whether chlorine dioxide attacks the cell structure or the acids inside the cell. The generation of proteins is avoided. Chlorine dioxide influences the cell layer by changing film proteins and fats and by anticipation of