Define diffuse. Diffusely

Diffusion Definition and Examples

define diffuse

Without this constant motion of molecules there would be no exchange of nutrients and end products of cellular metabolism between the intracellular and extracellular fluid and the cell could not survive. The kind of material in the solution also affects the rate of diffusion. The term partial pressure refers to the amount of pressure being exerted by a particular gas in a mixture of gases, the word partial referring to the part that is a particular gas in relation to the whole mixture. Molecules of a solution of higher concentration move more rapidly toward those of a solution of lesser concentration; in other words, the rate of movement from higher to lower concentration is greater than the movement in the opposite direction. This motion due to the collisions of particles is called or the Brownian movement.

Nächster

Diffuse Axonal Injury: Prognosis, Symptoms, and Treatment

define diffuse

The unequal concentration of the particles between two fluids will generate a gradient that will incite them to move in order to equalize the disparity in concentrations. Although it is diffuse type of brain injury itself, diffuse vascular injury is generally more likely to be caused by focal than diffuse injury. A great number of people who do survive the injury are left unconscious and never regain consciousness. It is commonly associated with damage to the , often resulting from a. In contrast, cellular transport wherein substances have to be moved to an area that is already saturated or high in concentration is called. Passive transport refers to the type of cellular transport wherein the net movement of substances is down the concentration gradient. See: illustration facilitated diffusion The movement of water into and out of cells, e.

Nächster

Diffuse Axonal Injury: Prognosis, Symptoms, and Treatment

define diffuse

Diffusion is the passive movement of molecules or particles from an area of higher concentration to an area of lower concentration. Since the movement is downhill, there is no chemical energy expenditure as opposed to active transport that uses chemical energy. The net movement of and across the alveolar-capillary membrane of mammalian s and the net movement of glucose down the concentration gradient are diffusion examples in biological systems. Similarly, in animals, respiratory gases are transported generally by simple diffusion. The lipid bilayer feature of the plasma membrane prevents the passage of polar molecules. The partial pressure of oxygen, for example, reflects the number of oxygen molecules striking the surface of the membrane at any given point.

Nächster

Diffuser

define diffuse

The difference is the diffusing molecules or particles. The passive movement of ions or molecules through a medium or across a semi-permeable membrane e. Diffusion by a perfectly diffusing surface occurs in accordance with Lambert's cosine law. Consider the following undeniably difficult situation: My roommate's incessantly burning incense diffuses throughout the apartment. The dye particles can be seen moving as they spread out throughout the solution. In diffusion, the diffusing particles are the solutes of a solution. The long connecting fibers in the brain called axons are sheared as the brain rapidly accelerates and decelerates inside the hard bone of the skull.

Nächster

Diffuse

define diffuse

Rather, it is driven by kinetic and natural energy. The thickness of the respiratory membrane can be affected by the presence of edematous fluid and by fibrotic changes in the membrane resulting from certain pulmonary diseases. In summary: Diffuse is both a verb and an adjective, and refers to the spreading of something, or making it less concentrated. Diffusion definition Diffusion is the net passive movement of s or particles from regions of higher to regions of lower concentration. As each molecule moves about, it bounces off other molecules and loses some of its energy to each molecule it hits, but at the same time it gains energy from the molecules that collide with it. The respiratory membrane is normally less than 1 micron in thickness, yet it is composed of three layers within the alveolus surfactant and fluid layers and alveolar epithelium , an interstitial space between the alveolar epithelium and capillary membrane, and two layers in the capillary membrane. The rate of diffusion is influenced by the size of the molecules; larger molecules move less rapidly, because they require more energy to move about.

Nächster

Diffusion

define diffuse

The diffusion capacity of a gas varies directly with the diffusion coefficient. Nevertheless, small nonpolar molecules and ions can pass through the lipid bilayer. The thickness of the respiratory membrane can be affected by the presence of edematous fluid and by fibrotic changes in the membrane resulting from certain pulmonary diseases. Search diffuse and thousands of other words in English definition and synonym dictionary from Reverso. My roommate wants the incessantly burning incense to diffuse more evenly throughout the apartment, but I do not. The rapidity and ease with which oxygen and carbon dioxide are diffused through the membrane are affected by the thickness of the membrane and its surface area, the diffusion coefficient of the gas in the water within the membrane, and the difference between the partial pressures of the gases in the alveoli and the blood.

Nächster