Diffusion

Simple diffusion is a passive process involving the movement of smaller, nonpolar molecules moving across a membrane from a high concentration area to a low concentration area without any forces acting upon the substance. Facilitated diffusion is a passive diffusion process involving the transportation of large or polar molecules and ions across the cell membrane (which they cannot normally pass through) with the help of transport proteins. Because facilitated diffusion is a form of passive transport, no energy is required for the movement of a solute from a high solute concentration area to a low solute concentration area. Osmosis is the movement of water molecules from a high water concentration area to a low water concentration area across…

In experiment 1.1, we studied the relationship molecule size has with diffusion rate. Our hypothesis claimed that smaller molecules will travel farther across the agar plate given the same duration of time. Based on the data collected, our hypothesis was proven true. Potassium permanganate has a molar mass of 158 g/mol, methylene blue 319.85 g/mol, and potassium dichromate with 294.185 g/mol. Potassium permanganate diffused the farthest, potassium dichromate second, and methylene blue secured…

Diffusion is important because it is how particles are moved into a cell and out. Diffusion is the movement of a particle from an area of higher concentration to an area of lower concentration (Reasoner 2011). Passive diffusion and facilitated diffusion are the two major types of diffusions. Passive diffusion, also known as simple diffusion, is when particles move freely through the lipid bilayer of the plasma membrane (Tortora and Derrickson 2014). Facilitated diffusion is when and integral…

Within the human body, the natural process of moving soluble molecules across a membrane is referred to as passive transport. For this type of transport chemical energy is not necessary. Two of the main types of passive transport that the human body utilizes are osmosis and diffusion. Diffusion is the movement of a hydrophobic substance across a semi-permeable membrane without the use of cell energy from a gradient area of higher concentration to an area (either inside or outside of the cell)…

1a. Osmosis: Osmosis is the diffusion of water across a selectively permeable membrane. Cell membranes have pores that are where molecules pass through the membrane. These pores are too small for some molecules like sugar to pass through, but are large enough for water molecules. These water molecules move across the membrane from areas of low concentrations of solute to high concentrations of solute. The different concentrations affect the water level. However, when a solution is dilute, the…

Particles can move. One type of movement is diffusion. Diffusion is when particles move from an area of higher concentration to an area of lower concentration. The particles can move throughout a liquid, an area , or through a semipermeable membrane. Diffusion can be facilitated or non facilitated. When no other factors are involved in diffusion the particles are moving down their concentration gradient so that the amount of particles can be evenly distributed. if proteins or helpers are…

Cells use various methods of transportation to move material in and out of the cell. The semi-permeable plasma membrane surrounds the cell and allows certain materials to enter and exit the cell. Simple diffusion is movement of molecule through the plasma membrane without the help of any channel or proteins. In simple diffusion molecule move down their concentration gradient; as a result, they don’t require energy input. In the computer simulated lab for simple diffusion, nothing will move…

In the first part of the lab we were able to study the diffusion of various carbohydrates and the osmosis of water. Diffusion is the process of small molecules moving through a semipermeable membrane while osmosis of water is the movement of water through a semipermeable membrane from an area of high water potential (low solute potential) to an area of low water potential (high solute potential). Both diffusion and osmosis move in the direction that would create equilibrium on both sides of the…

potential to a region of water that has a lower potential through semipermeable membranes. There are three types of solutions, hypertonic, hypotonic, and isotonic. Hypertonic solutions have a higher concentration of solute while hypotonic solutions have a lower concentration of solute. Isotonic solutions have an equal concentration of solute. There is no net movement going in or going out of the isotonic solution or solute. The purpose of this experiment is demonstrate osmosis by weighing the…

IV. Discussion The Concentration Gradients is known as known as diffusion. They are spontaneous process because there is no energy input at the beginning (Reece et al., 2011). Each substance could diffuse to its own concentration gradient without affected by the concentration of other substances (Scott 2015).In the first experiment of the Concentration Gradients. The color of the clear water was expected to change into the color of the potassium permanganate dye, which was purple. Observation…