Mucous membrane

The plasma membrane also known as the cell membrane is found in every cell. The cell membrane is around 7-10nm, making it difficult to view even with a transmission scanning electron microscope (it only shows a double black line), this means that no one knows exactly what the membrane looks like. All membranes have the same basic structure made up from phospholipids (fats). The membrane is made up of a phospholipid bilayer; consisting of a polar phosphate head and two fatty acid tails. The head…

in and brings waste out. This movement of particles in and out of cells is based around osmosis. It is written in the Lab Manual (2014) “Osmosis is diffusion of water across a differentially permeable membrane” (p. 97). In this experiment, dialysis tubing, a type of differentially permeable membrane which only lets water molecules through, was used to create bags used to model cells. Four bags were made and labeled “A,” “B,” “C,” and “D.” The bags were filled with sucrose solutions of 1%, 1%,…

Once the egg was decalcified, it felt very fragile and bouncy. When the egg didn’t have a shell anymore, it was kept from seeping out by the “plasma membrane” (egg white), which was congealed by the soaking in vinegar. When the nucleus of the egg became visible, it looked very cloudy. The substance that entered/left the egg in each situation was water, due to the state of the egg, by way of osmosis, in…

process that reproduces one of the essential components of ethylene production. MTN1 and MTN2 are known to exist in the cell’s membrane and to establish an interaction between HopAF1 and MTN1/MTN2, a type of microscope was used that allowed for HopAF1 to be dyed and followed. From this microscopic viewing, they concluded that HopAF1 interacts with MTN1/MTN2 on the cell membrane. Due to the interaction, they also concluded that HopAF1 inhibits ethylene production. This is evident in figure 3A…

require homeostasis in order for the organisms to function. Understanding the different balance cells need to maintain will aid us in understanding how cells in organisms successfully maintain osmo-regulations. Eukaryotic cells have selective permeable membrane giving them the unique function of regulating specific molecules between the intracellular and extracellular environment. This experiment will help researchers understand how cell maintain its’ cellular regulations. For this reason, the…

DISCUSSION Spermatozoa and its Arrival to the Egg Before embarking in the complexity of CatSper channels, the particular characteristics of sperm and its movement towards the egg in female that allows for fertilization should be addressed. Spermatozoa are differentiated motile cells that have two main structures: the head, which houses packed DNA, and the flagellum, the motility portion that transports the sperm genetic information to the egg (1). Within the spermatozoa head both a vesicle…

In order to determine the extent to which the reversal potential for potassium determines the resting membrane potential of a given cell, a mechanism is needed to determine the change in membrane voltage across the cell in different extracellular potassium solutions. The intracellular recording technique consists of puncturing a prepared cell with a conductive pipette. The difference in potential between the extracellular electrode and the wire in the pipette is recorded and displayed on the…

experiment is to investigate the ionic basis of the neuron’s resting membrane potential (Vm). We examine how this potential is affected by potassium ion [K+] concentration and permeability using Orconectes rusticus crayfish abdominal muscles, and we ask whether or not the Nernst Equation solely based on [K+] can also predict the cell’s resting membrane potential. We predicted that [K+] concentration had a significant influence on the membrane potential and thus the Nernst Equation was an…

composition except in place of 200 μL of buffer, 200 μL of water were added to the solution. The lysis buffer’s function is to lyse the cell, however, in Test tube 1, without the presence of the appropriate complement the buffer could not break the membrane structure. Therefore this test tube demonstrates the need for compliment in cell lysis, even in the presence of the buffer’s detergents. In Test tube 8 water causes erythrocytes to swell and burst and is an excellent detergent, since it is…

goal for the experiment was to determine where the drugs may reside according to their properties. We learned that there are parts in the cell that are more hydrophobic (water-fearing) and other parts that are hydrophilic (water-loving). The cell membrane is mostly hydrophobic and the cytosol is mostly hydrophilic. We made predictions of where the drugs would reach giving their chemical structure. This…