Molecular diffusion

Adenosine triphosphatase (ATPase) is a mitochondrial lipid dependent membrane bound enzyme and principle donor of free energy in the living system. Any alteration in membrane lipids leads to changes in membrane fluidity, which in turn alters the ATPase activity and cellular function. The use of ATPase level measurement was considered as an appropriate index of membrane damage. Pathological processes that interfere with the production of ATP may interfere with sodium pump activity, which in turn…

50mL of water in room temperature, and a teabag was placed into a beaker of water. The observation was made for the next 5 minutes. Replacing the water in room temperature to warm water did the same procedure. The following observation was made. Diffusion, Dialysis, and Osmosis Effects of Osmosis on Potato Cells: Experiment1 In this portion…

movement of solvent molecules through a semipermeable membrane into a region of higher solute concentration, in the direction that tends to equalize the solute concentrations on the two sides. Osmosis also refers specifically to the diffusion of water molecules. Diffusion is the movement of chemical particles for an area of high concentration to an area of low concentration.The semipermeable is a material or membrane allowing certain substances to pass through it but not others.Large molecules…

Introduction The cell membrane provides a boundary between the intracellular environment and the extracellular environment. The membrane is selectively permeable only allowing some substances to pass through while some can’t. The cell membrane consists of two phospholipid bilayers. Each layer has an electrically charged, hydrophilic head, while the tail is an uncharged hydrophobic. The electrically charged head of these layers face toward the water as the uncharged tails face each other. This…

Osmosis is the net movement of water towards higher concentration. In osmosis experiment, water likes to diffuse from an area of low-solute concentration to an area of high-solute concentration. The purpose of the osmosis experiment was to observe the diffusion of solutes and the osmosis of water through a semipermeable membrane, which was dialysis tubing. This experiment was done to examine, if the solution is hypertonic, hypotonic or isotonic. The result of this experiment was that…

How ADH Helps Regulate Water Reabsorption The kidneys are highly specialized organs that regulate water homeostasis in the human body. They are composed of functional units called the nephrons. Within the nephron, the majority of water homeostasis takes place in the collecting duct, as this component is responsible for water excretion (Sands & Layton 2017). The crucial hormone that is released in the collecting duct and is responsible for stimulating water retention is the antidiuretic…

A special case of diffusion is known to be osmosis, which is known to be the diffusion of water through a water allowing or permeable membrane. Only water should be able to move through most oftenly. Therefore, the diffusion of one or more other substances along with water should not come in, such as solutes. An everyday example of osmosis is from the result of proned fingers. The bathtub that the person is showering is less concentrated in comparison with your body, thus, it is using osmosis to…

Cholesterol has a unique structure that includes four linked hydrocarbon rings forming the steroid structure. The hydrocarbon tail links to one end of the steroid and a hydroxyl group linked to other end. While the hydroxyl group is able to form hydrogen bonds with nearby carbonyl oxygen of phospholipid. Additionally, cholesterol is an amphipathic macromolecule because it has a water-soluble polar region that dissolves in water, but almost the entire is non-polar which does not dissolves in…

1. (a) Diffusion refers to the movement of molecules from an area of high concentration to an area of low concentration of those molecules. The factors that influence the rate of diffusion across a membrane are: ~ the extent of the concentration gradient – the greater the difference in concentration on either side of the membrane, the faster the rate of diffusion ~ the mass of molecules diffusing – the heavier they are, the slower they will diffuse across the membrane ~ the distance travelled –…

There are 3 ways for passive transport which are osmosis, diffusion, and facilitated diffusion. Osmosis is when water moves a selectivity permeable membrane. There are three types of solution of osmosis. One of them is isotonic solution where water crosses the membrane at the same rate. Hypertonic is where it loses water to the surroundings. Hypotonic is where water will enter the cell quicker than it leaves. Another type is facilitated diffusion which does not allow polar molecules to pass…