Contact Us
Sign In / Sign Up for FREE
Go to advanced search...

Movement of substances across the cell membrane - Assignment Example

Comments (0) Cite this document
In the paper “Movement of substances across the cell membrane” the author focuses on the transfer of substances across the different cells that make up the organism. One of the processes through which substances move across the cells in the organism is through osmosis…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER92.5% of users find it useful
Movement of substances across the cell membrane
Read TextPreview

Extract of sample "Movement of substances across the cell membrane"

Download file to see previous pages In the hypertonic and hypotonic solutions, more water molecules repeatedly strike the cell membrane from the side with a high solute concentration, meaning that more water molecules will be forced to pass through the pores of the semi-permeable membrane (Sperelakis, 2001). As a result of this, the water molecules move from the side with high water concentration to the side with a low water concentration until the two sides are equally concentrated. The final solution is called an isotonic solution. Looking at the cell membrane itself, it can be seen that its composition allows for the selective movement of only certain substances. The osmotic pressure in the different cells ensures that the process of osmosis is continued until all the cells in the organism are of equal concentrations. As already mentioned, the semi permeability of the cell membrane allows only for the passage of certain particles, and in the case of the organism, it only allows for the passage of water molecules. This means that the process of osmosis is used to equalize the concentration of solutions in the body cells and their environment. 
b. Phagocytosis
One of the other process by which cell movement is achieved is through phagocytosis, which is the process by which cells engulf foreign particles and ingest them by virtue of their power of amoeboid movement (Sperelakis, 2001). The movement due to phagocytosis is two way, from the point at which the cell moves towards the invading organism to the point when the organism is engulfed into the cell. In most organisms, this process was used for nutrition, but higher organisms have developed it to be used for other functions like fighting disease in the body. In the process, the cell is attracted towards the microbe that needs to be ingested through a process of chemotaxia, which means that the microbe is identified through a chemical signature that attracts the cell. This process is called activation of ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
(“Movement of substances across the cell membrane Assignment”, n.d.)
Retrieved from
(Movement of Substances across the Cell Membrane Assignment)
“Movement of Substances across the Cell Membrane Assignment”, n.d.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document

CHECK THESE SAMPLES OF Movement of substances across the cell membrane

Transport Across Cell Membranes

...? Transport across Cell Membranes A Descriptive Report # The cell membrane is the cell’s external boundary. It aids in providing shape and mechanical power to a cell and controls molecular movement into and out of the cell (Starr & McMillan 2008). Hence, given its latter role, it mainly functions as a safeguard of cellular homeostasis. The cell membrane’s composition is mostly connected to its task (Starr & McMillan 2008). The membrane is made up of a phospholipid bilayer wherein proteins are incompletely or completely implanted. The...
3 Pages(750 words)Term Paper


...?Studying the impact of solute concentration on the rate of osmosis Introduction: Osmosis is defined as the movement of water molecules through a selective membrane (Freeman, 2010). Osmosis occurs so as to balance the water potential on either side of the membrane. Water potential is used to describe the tendency with which water moves from one region to another. This experiment was carried out in order to determine how the rate of osmosis changes under different solute concentrations. Solute concentrations heavily influence how osmosis occurs. In animal cells, when the solute concentration is equal on both sides of the membrane, there will be no...
4 Pages(1000 words)Lab Report

Plasma Membrane and Diffusion

...[Yos07].The plasma membrane which is also known as the cell membrane borders the cytoplasm of cells and has a cell wall which provides support to the cell and prevents the passage of larger molecules into the cell and it anchors the cytoplasm providing the cell with a shape. The plasma membrane attaches itself on other cells and the extracellular matrix and this helps group cells together to form tissues [Dan11].The plasma membrane’s selective permeability enables it to regulate movement or transport of materials in and...
2 Pages(500 words)Case Study

Membrane Budding in Cells

...of budding, when they move the substances through the cell (Hurley, Boura, Carlson and Rozycki, 2010). Eukaryotic cells consist of organelles and cytoskeletons. Cytoskeletons are cellular structures in the form of a skeleton that determine the shape of a cell. Organelles refer to specialized internal structures of a cell that carry out an action. The nucleus in the cell’s surrounding, is a double membrane with pores, which facilitates movement of materials in and out of the cell. Eukaryotic cells undergo the process of mitosis where they split into two daughter...
2 Pages(500 words)Essay

Membrane filtration (expriment)

...". Caister Academic Press. 2005. Hasegawa, H., Naganuma, K., Nakagawa, Y., Matsuyama, T. "Membrane filter (pore size, 0.22-0.45 micro m; thickness, 150 micro m) passing-through activity or Pseudomonas aeruginosa and other bacterial species with indigenous infiltration ability". FEMS Microbiol Lett. 223(1): 41-6. 2003. Pelczar, M.J. "Microbiology: Concepts and Applications". Study Gd ed. Mcgraw-Hill College. 1993. Microbial growth Microbial growth refers to both the increase in cellsize and number of cells in a population Nutrition is a process by which organisms acquirechemical substances (Nutrients) used in cellularactivities such as metabolism and growth.Organisms differ in the use of...
5 Pages(1250 words)Lab Report

Glomerular basement membrane diseases

...Glomerular Basement Membrane Diseases Glomerular basement membrane or GBM is an important membrane of the glomerulus that forms the boundary between blood and urine. It consists of a central thick electro-dense layer known as lamina densa surrounded by 2 thin peripheral layers, the lamina rara interna and lamina rara externa. The constituents that make up the membrane are type- 4 collagen, laminin, polyanionic proteoglycans, fibronectin, entactin and several other glycoproteins and collagen (Alper, 2007). The main supra structure is formed by type- 4 collagen to which other glycoproteins attach (Kang et al, 2006).   NORMAL GBM. LEFT - a single glomerulus. There are one...
5 Pages(1250 words)Essay

NURSING ASSIGNMENT Substances- alcohol

...Nursing Assignments - Alcohol Table of Contents Introduction 3 Reasons behind Alcoholism 4 Policies 5 Steps toward Prevention 5 Conclusion 6 References 7 Introduction Alcohol is an organic compound that depressants the central nervous system of human beings. Its effect can be of short term as well as long term. Effects of alcohol depend on the consumption type and quantity, body chemistry of consumer, age, gender, weight, food consumption, experience and situation. Situation is the economical condition in which an individual starts drinking. The short term effect includes minor behavioral stimulation, effect in performance, and mild euphoria. Risky stage commences when individual balance and coordination are impaired. Also... Assignments -...
4 Pages(1000 words)Essay

Chemical Substances Fungicides fungi thus avoiding synthesis of major fungi constituents that are necessary for life, enzyme and other cell components are not produced and eventually the cells die .Another group of fungi are known hinder electron transport system which is essential for the physiological function of the fungi like the oxidative phosphorilation, an important process in respiration. Inhibition of protein synthesis is also a way in which fungicides arrest the fungal growth, this indicates that it stops the all important processes of transcription and translation hence death results. Membrane synthesis can also affected making the fungi cells vulnerable to the process of osmosis that...
1 Pages(250 words)Essay

Electrically Driven Membrane Processes

...more concentrated hence moving ions from the region of low concentration to highly concentrated region. The present paper is a survey study on the problem of fresh water in UAE and how electrically driven membrane processes can be useful in boosting water supply. 2.0 Occasion Usually, water is a critical resource for human, animal and plant life. However, the biggest percentage of water available contains substances that make it unfit for not only human and animal consumption, but also to support plant life. This survey report was developed as part of the global efforts seeking to shed more light on water re-use and reclamation. The data used was collected over a decade with most of it having been...
7 Pages(1750 words)Research Paper

What factors affect the rate of transport of molecules across cell membrane

...TRANSPORT OF MOLECULES and Transport of molecules Each cell interacts with the rest of the body through the exchange of substances (Lippincott 2002, p.11). A cell needs to absorb and excrete various compounds throughout its life. Four main processes allow molecules pass through the cell membrane (Wright 2000, p.12). These are diffusion, active transport, osmosis and phagocytosis. These processes are divisible into three categories. These are active transport, passive transport and vesicular transport. As shown in Fig 1, the cell membrane is the outer layer of the cell. It is the medium through which all transportation must take place. Fig 1 (Google Images, 2014). Diffusion is the movement of particles from an area of high to low... ...
4 Pages(1000 words)Essay
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.

Let us find you another Assignment on topic Movement of substances across the cell membrane for FREE!

Contact Us