Cell Membrane Essay Examples

The Cell membrane surrounds all living cells and is the most important organelle, there is also a similar plasma membrane that surrounds all the organelles except for the ribosome. The membrane controls how and what substances can move in and out of the cell/organelle The structure of the membrane is often referred to as the […]

ABSTRACT Beer’s Law is an empirical relationship that relates the absorption of light to the properties of the material through which the light is travelling. In turn, absorbance is proportional to concentration and the higher the concentration, the higher the absorbance. This experiment incorporated Beer’s Law and is focused on determining the stress that various […]

Aim: to investigate the factors affecting cell membrane permeability of red cabbage, using absolute alcohol (10 cm3), 1 M hydrochloric acid (10 cm3), 1M sodium hydroxide (10 cm3), and distilled water (10 cm3), and change of temperature (40 oC, 65 oC, 100 oC)Hypotheses:If the leaf discs are not rinsed, the distilled water will change colour, […]

Investigating Membrane Permeability Reason for choosing beetroot as the object of experiments Beetroot is usually used as the membrane ‘disruption’ experiment. It is because of beetroot has more pigments in their vacuole. These pigments show how variables damage the membrane of beetroot. The pigments will be automatically extracted from the vacuole when the membrane is […]

Effects of Temperature on Beetroot Cell Membranes Background Information: A cell membranes is a thin structure that surrounds the whole cell. It contains the cytoplasm of a cell. The cell membrane is made up of hydrophilic region and a hydrophobic region. The hydrophilic region likes water, it is on the outside of the cell, the hydrophobic […]

The aim of this experiment was to find the major proteins that make up the plasma membranes of cells, their whereabouts within the membranes, and what effect various pre-treatments would have on these proteins. It was the erythrocyte membrane that was studied in this experiment because red blood cells can easily be extracted from whole […]

The plasma membrane exists in all living things for the simple ground that it serves critical maps without which the cell can non last. The plasma membrane is composed chiefly of a phospholipid bilayer which is made up of hydrophobic lipid “tails” that point inwards and hydrophilic phosphate “heads” that are positioned so that one […]

Describe two Variables that affect the rate of diffusion. The two variables that affect the rate of diffusion are: A. The size of the molecule. The larger molecule will spread more easy than the smaller molecule. B. The nature of plasma membrane. If the membrane is composed of lipid part. . merely lipid soluble molecules […]

Cells are the basic living units of all plants and animals. The cell is the structural and functional unit of all living organisms. There are a wide variety of cell types, such as nerve, muscle, bone, fat, and blood cells. Each cell type has many characteristics, which are important to the normal function of the […]

Cell membrane permeability practical investigation This experiment investigates the effect of changes in pH, alcohol, and different concentrations of detergents on beetroot membranes. If the extreme levels of pH would degrade the beetroot cell membrane, the experiment would prove that different solutions react differently. Introduction Cell membranes are the entry points for liquid solutions. They […]

Aim To find out how the permeability of a beetroot membrane cell is affected by ethanol. To do this we will investigate different concentrations of alcohol (10-70%) and measure the absorbance using a colorimeter to show us how much juice has leaked out. Hypothesis I predict that as the concentration of ethanol goes up, the […]

All cells require essential materials to ensure their survival. Chemical, physical, and biological processes are used to move these materials inside of cells. Similar processes move waste materials outside of cells. These processes can be passive, occurring as a result of basic physical laws and requiring no outside energy from the cell or they can […]

Osmosis is the net movement of water from a high concentration of water to a low concentration of water down a concentration gradient. This is done to equalise the solute concentrations on the two sides. Therefore, in other words, the movement of water is depended on the concentration of dissolved solute in the water (in […]

The purpose of these experiments is to examine the driving force behind the movement of substances across a selective or semiperpeable plasma membrane. Experiment simulations examine substances that move passively through a semipermeable membrane, and those that require active transport. Those that move passively through the membrane will do so in these simulations by facilitated […]

Beet root cells contains a red pigment, which is found in the cell vacuole. The vacuole has a membrane in which its function is mainly to prevent the betacyanins from leaving the cell. Leakage of these betacyanins into the external solution can be used as an indication of membrance pereambility changes. As part of my […]

The main focus of the Human Biology Unit 1 Assignment is the study of cells, including their structure and function. Cells are small structures that are surrounded by a membrane and contain an aqueous solution. Within cells, there are various organelles that have specific functions. Eukaryotic cells possess several organelles such as the nucleus, ribosomes, […]

Learning about Cells. First thing to show you are two beautiful pictures of a Cell. Imagine all of this is in something so small we cannot see it with our naked eyes. About 10,000 average-sized human cells can fit on the head of a pin. There are a few exceptions, but the average cell is […]

Introduction A red pigment called Betacyanin located in the vacuole of the beet cells is released when the membrane is damaged (Danyk, 2013). The membrane is necessary for sustainability of the cell’s life, it separates the cell from the outside environment, and is responsible for diffusion, exocytosis and endocytosis, and transport. It can be damaged […]

Tube was removed and the water in the test tube was tipped out. 10ml of tap water was then added to it and then left to stand in the test tube rack. The beaker was then heated to 35c. The burner was then turned off and the water’s temperature was left to rise to 40c. […]

The laboratory experiment investigates the components of the cell membrane, such as cholesterol, protein, and phospholipids. Phospholipids consist of a hydrophilic head with glycerol, negatively charged phosphates, and choline or serine groups. They also have a hydrophobic tail made up of long chains of hydrocarbon. These amphipathic phospholipids form bilayers in cells called the plasma […]