Cell membrane Essays

  • Cell Membrane Permeability Case Study

    1977 Words  | 8 Pages

    this study was to understand how cell membranes are able to store pigments in their intracellular compartments which then prevents the pigments from entering the general cytoplasm using different concentrations of a solution which in this case was detergent (Huber, et al., 2018).Several slices of Beetroot were immersed in water and three different concentrations of Tween 20.It was then hypothesized that Higher concentrations of Tween 20 will increase the cell membrane permeability of Beetroot. The results

  • Describe The Fluid Mosaic Structure Of Cell Membranes

    800 Words  | 4 Pages

    How do the membranes of cells and the organelles they contain control the movement of materials? According to the text, cells are the smallest and most basic unit of life. Cells are organized by the outer cell membrane that separates the watery interior of the cell from the outer environment. Energy is required in order for cells to sustain their functions. One way they may use energy is by conducting photosynthesis to produce chemical energy from sunlight. The membrane systems of cells manage an

  • Cholesterol Lab Report

    789 Words  | 4 Pages

    in the middle of a polyunsaturated lipid membrane. This seems to be caused by the polyunsaturated lipid membrane’s incapability to be in close proximity with cholesterol’s usually hydroxyl position. Lastly, the hydroxyl group influences cholesterol’s overall function because it helps the molecule regulate the membrane. It does this by cooperating with the membrane phospholipids and sphingolipid’s’ polar head

  • Sphingolipids Lab Report

    477 Words  | 2 Pages

    Sphingolipids and the CNS Sphingolipids encompass a complex range of membrane lipids in which a fatty acid is linked to a long sphingosine carbon backbone, primarily C18-sphinganine (18:0) and C18-sphingosine (C18:1) in mammals. Figure 1 shows a schematic representation of the sphingolipid metabolic pathway. Ceramide is central in sphingolipid metabolism and is produced by de novo and recycling pathways.37 In de novo synthesis, serine and palmitoyl-CoA are substrates of serine palmitoyl-transferase

  • Beetroot Membrane Permeability Study

    794 Words  | 4 Pages

    A study on the effect of concentration of ethanol on beetroot membrane permeability. Background info: Membrane permeability is the state of membrane that allows liquids or gasses pass through it. Temperature, pH and concentration of alcohol are 3 factors that affect the membrane permeability of any cell. In the beetroot plant, the red or purple pigment that is located in the vacuole, which is embedded to the membrane, is called bectacyanin or betalain. Betalains are soluble in water, therefore

  • Starlings Forces

    682 Words  | 3 Pages

    force generated by proteins in the interstitial fluid or capillary. Forces that favor the filtration of fluids across the capillary membrane are Pcap, the force of fluids to move out of the capillary into interstitial space, and int, the force of fluids moving out of the interstitial space and into the capillary. Forces that oppose filtration across the capillary membrane are Pint, the force

  • Blood Brain Barrier Analysis

    707 Words  | 3 Pages

    function of these molecules: they join endothelial cells together and restrict movement of ions and proteins in-between cells of different tissues. Claudins are 20-34 Kilodalton (kDa) integral membrane proteins of the tight junctions regulating its function (Goncalves et al., 2013). They consist of four-transmembrane domains, N- and C-terminal cytoplasmic domain and two extracellular loops (ECL). The majority is found in epithelial or endothelial cells of all tissues containing tight junctions (Fig

  • Copper Cycle Lab Report

    800 Words  | 4 Pages

    Copper Cycle Lab Report Ameerah Alajmi Abstract: A specific amount of Copper will undergo several chemical reactions and then recovered as a solid copper. A and percent recovery will be calculated and sources of loss or gain will be determined. The percent recovery for this experiment was 20.46%. Introduction: The purpose of this experiment is to demonstrate the different types of chemical reactions, those including Copper. There are different types of chemical reactions. A double displacement reaction

  • Conflict: The Causes Of Conflict In Africa

    848 Words  | 4 Pages

    According to Gesiye (2003) conflict can be defined as debate, controversy, fights and wars between people or countries. Conflict usually takes place when underprivileged groups, nation and individuals are aiming to increase their share of power and wealth and to adjust to the presiding and main values, norms and believe. According to Galtung (1996) Conflict can be looked at as a structure, attitudes and behaviour. Conflict as a ‘structure’, means the conflict situation, groups have mismatched interests

  • The Effect Of Molecular Concentration On The Rate Of Diffusion

    700 Words  | 3 Pages

    INTRODUCTION Diffusion takes place on molecules of liquid, gas or a solution. It is the movement of molecules from an area of higher concentration to an area of lower concentration down a concentration gradient in random motion (D G McKean, Dave Hayward 2014). The diffusion of molecules passing across a lipid bilayer is also affected by its “hydrophobicity”. Diffusion can be done without the use of energy due to the randomness of the movements of particles. Molecules move from areas where they are

  • Chemical Composition Of Plasma Membrane

    2000 Words  | 8 Pages

    C) Describe the chemical composition of the plasma membrane and relate it to membrane function. The plasma membrane is the outer limiting membrane of a cell that separates the body’s two major fluid components, the intercellular fluid that is within cells and the extracellular fluid outside of cells. It is very thin, about 7 to 10 nm, and is composed of a bilayer of lipid molecules with proteins dispersed in it. The phospholipid bilayer is composed of a portion that is hydrophilic, or attracted

  • Plasma Membrane Lab Report

    712 Words  | 3 Pages

    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. Membrane has a bilayer of

  • Resting Membrane Potential Lab Report

    1566 Words  | 7 Pages

    RESTING MEMBRANE POTENTIAL When the neuron is not sending a signal at rest the membrane potential called as resting membrane potential. In this stage, permeability of K+ much greater than Na+ When a neuron is at rest, the inside of the neuron is negative relative to the outside. Although the concentrations of the different ions endeavor to balance out on both sides of the membrane, they cannot because the cell membrane sanctions only some ions to pass through channels (ion channels). At rest, potassium

  • Carrier Protein Research Paper

    729 Words  | 3 Pages

    protein provides the passage for the ions or large, polar molecules to move across the cell membrane. Some of the ions or molecules need to make use of the carrier proteins with the help of concentration gradients. Nonetheless, some molecules which are important to human body sometimes need to go against the concentration gradient. There are two types of ways for the ions or molecules to pass through the cell membrane using carrier proteins. They are active transport and facilitated diffusion. In

  • Biological Membranes Lab Report

    1621 Words  | 7 Pages

    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. There are various membranes and all have a variation of functions. The tonoplast in beets, contains a water-soluble red pigment called betacyanin, this pigment is what gives the beetroots is distinctive purpleish

  • Importance Of Homeostasis

    1230 Words  | 5 Pages

    In addition to this, osmoregulation is associated with controlling the water content of the body. This is monitored so that cells have protection, not allowing over a certain amount of water to enter or exit them. Therefore, the amount of water content is adequately monitored and controlled through water loss. This can occur through the lungs when the body exhales, the skin when we sweat and the body through urine that is formed by the organ known as the kidneys. Moreover, this also includes controlling

  • Lipoproteins Research Paper

    1025 Words  | 5 Pages

    LDL is formed from VLDL and some are released by the liver. LDL is a major transport form of cholesterol and cholesteryl esters in the circulation.. LDL has a specific cell surface receptors [123] as show in figure (1-10). The amount of LDL receptor is regulated by the cellular requirement for lipids, with the primary regulatory lipid being cholesterol [124]. High level of LDL-C is connected with elevated risk of heart

  • Essay On Primary Active Transport

    831 Words  | 4 Pages

    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. Active transport means the movement of ions or other substances

  • Plasma Membrane Research Paper

    1747 Words  | 7 Pages

    plasma membrane is the boundary between the cell and its environment. It regulates what enters and exits the cell. Cells must maintain an appropriate amount of molecules to function inside them. They must also have a way to keep things out or to allow things to enter. This is the job of the plasma membrane. The plasma membrane is like the guard must inspect those who enter and those who leave to make sure that only the people and things needed in the community are there. A plasma membrane encloses

  • Characteristics Of Mitochondria

    1275 Words  | 6 Pages

    Mitochondria are the main suppliers of ATP in most mammalian cells, it control both neurotic and the apoptosis signaling pathway, which is the apoptotic cell death pathways. Mitochondria is associated with the coordination of the cellular calcium (Ca2+) signaling. Mitochondria also produces and are targets of free radical species that control many characteristics of the cell’s physiology, this can be seen in Figure 1 and the structure and function can be seen in Figure 2. (Duchen and Szabadkai 2010)