Concentration gradient - a difference between concentrations in a space.. Molecules will always move down the concentration gradient, toward areas of lesser concentration. diffusion [dĭ-fu´zhun] 1. the state or process of being widely spread. This does not break the law of reflection. Any information here should not be considered absolutely correct, complete, and up-to-date. defuse or diffuse? (General Physics) to undergo or cause to undergo diffusion. By infusing cubes of agar with a pH indicator, and then soaking the treated cubes in vinegar, you can model how diffusion occurs in cells. What does the South African term jukskei mean? Origin: L. Dis = apart, fundere = to pour Diffusion is a type of transport that moves molecules or compounds in or out of a cell. 2. diffusion [dĭ-fu´zhun] 1. the state or process of being widely spread. b. a reflection or refraction of light or other radiation from an irregular surface or an erratic dispersion through a surface. What Is Diffusion in Biology? Characteristics of Diffusion 3. *To do so there must be a high oxygen concentration and a low carbon dioxide concentration in the alveoli. Here Are Our Top English Tips, The Best Articles To Improve Your English Language Usage, The Most Common English Language Questions. 29 terms. A familiar example is the perfume of a flower that quickly permeates the still air of a room. Particles start moving randomly. While this could be facilitate… There are three main types of diffusion, which include simple diffusion, channel diffusion and facilitated diffusion. Ecological Efficiency Ecological efficiency is a measure of the amount of energy that is produced by one trophic level and is incorporated into the biomass of the next (higher) trophic level. Khan Academy is a 501(c)(3) nonprofit organization. 3. Diffusion definition, act of diffusing; state of being diffused. Diffuse large B-cell lymphoma (DLBCL), the most frequent subtype of lymphoid malignancy, remains a significant clinical challenge, as ∼30% of patients are not cured. 10 septembre 1993 Première diffusion de "X-Files" 20th Century Fox Television diffuse aux Etats-Unis le premier épisode des aventures des agents Mulder et Scully. 7. diffuse definition: 1. to (cause something to) spread in many directions: 2. to (cause a gas or liquid to) spread…. It also sheds light on the reasons animals adapt... Traumatic Brain Injury may lead to Seizure, Increased Amount Of Enzyme In Brain May Be Marker Of Alzheimer’s Disease, Localization of HIV-1 Vpr to the nuclear envelope: Impact on Vpr functions and virus replication in macrophages. Some variables include the number of molecules that are inside the cell, the time it takes for the molecules to diffuse, the permeability of the molecule and cell membrane, and the size of the cell. It is the main form of transmission of essential substances (such as amino acids ) between cells. ... Return to Biology Home The rate of transport of water in plant with ring porous wood is ten times faster than those with diffuse porous wood. What does the South African term dof mean? A mirror is a common example of a smooth surface that causes specular reflection. For diffusion to occur there must be a concentration gradient. The ammonia vapor will diffuse, or spread away, from the bottle; gradually, more and more people will smell the ammonia as it spreads. Parenchyma cells form the “filler” tissue in plants, and perform many functions like photosynthesis, storage of starch, fats, oils, proteins, and water, and repairing damaged tissue. Facilitated diffusion. Diffuse axonal injury (DAI) is a type of traumatic brain injury that occurs with a closed head injury. Diffuse lipomatosis of thyroid gland masquerading as malignancy: a case report For ER staining: 21 of 23 ADH cases (91%) and 10 of 10 DCIS cases (100%) showed diffuse staining, whereas none of the 32 UDH cases showed diffuse staining. Each ray reflects back at the same angle at which it struck the object but in a different direction. What does the South African term hamel mean? Experiment: ADVERTISEMENTS: When a lump of sugar is added to a glass of water, the sugar gradually disappears and, ultimately, a […] I.e. See more. © 2001-2020 BiologyOnline. Diffusion usually happens in a solution in gas or in a liquid. 1. to spread or cause to spread in all directions. Physiological Role. When different gases diffuse through each other this is what's happening when the smell of perfume diffuses through the air in a room. Before using our website, please read our Privacy Policy. This AQA Unit 2 quiz will help you revise. When the molecules are even throughout a space - it is called EQUILIBRIUM. Diffusion vs. bulk flow[edit] Definition of Diffuse. Diffuse means, broadly, ‘disperse’, while the non-literal meaning of defuse is ‘reduce the danger or tension in’. By Staff Writer Last Updated Mar 25, 2020 8:16:47 AM ET. Here are a few notable examples. 1Spread over a wide area or between a large number of people. The verbs diffuse and defuse sound similar but have different meanings. Year 10 and Year 11 pupils need to understand the passive movement of molecules in areas of high concentration, through membranes to areas, of low concentration. Diffusion is an important process within the human body and is essential to the transport of molecules within a number of organs including the lungs, kidneys, stomach and eyes. Definition of Diffusion: The spreading of solute molecules through­out the water molecules is called diffusion. So diffuse light is scattered light. Gasses and molecules in a liquid have a tendency to diffuse from a more concentrated environment to a less concentrated environment. Origin: L. Dis = apart, fundere = to pour. Intermingle with another substance by movement, typically in a specified direction or at specified speed. Facilitated diffusion describes the process of passive transport of molecules across a membrane, with the help of transmembrane proteins. Have you ever thought about what makes you alive? On rough surfaces, even microscopic irregularities create roughness. The material that diffuses could be a solid, liquid or gas. Learn more. Definition of Diffusion 2. Carbon dioxide needs to diffuse from the blood into the alveoli. Science AP®︎/College Biology Cell structure and function Facilitated diffusion. Learn more. The concept of diffusion is widely used in many fields, including physics (particle diffusion), chemistry, biology, sociology, economics, and finance (diffusion of people, ideas, and price values). Diffusion, process resulting from random motion of molecules by which there is a net flow of matter from a region of high concentration to a region of low concentration. The dissimilarity in the amounts of solutes, particles, or molecules between the two regions will cause them to move between the two regions. Diffusion, process resulting from random motion of molecules by which there is a net flow of matter from a region of high concentration to a region of low concentration. ... Metabolism and respiration rely in part upon diffusion in … The content on this website is for information only. Diffuse fatty infiltration of the thyroid tissue on gross inspection is called diffuse lipomatosis of thyroid. adj. Learn more. To define diffusion in the biological context, imagine the ions, respiratory gases, glucose, or other particles that move randomly between the crowded and the less-crowded regions (flui… What does the South African term inyanga mean? Cause (light) to spread evenly to reduce glare and harsh shadows. This is a spontaneous process and cellular energy is not expended. When the molecules are even throughout a space - it is called EQUILIBRIUM. Similarly, the medium in which diffusion occurs could also be in one of the three physical states.One of the main characteristics of diffusion is the movement of molecules along the concentration gradient. Simple diffusion A process in which the substance moves through a semipermeable membrane or in a solution without any help from transport proteins. (Botany) (esp of some creeping stems) spreading loosely over a large area. Well, almost everything that happens inside you happens inside a cell, too. Focal and diffuse brain injury are ways to classify brain injury: focal injury occurs in a specific location, while diffuse injury occurs over a more widespread area.It is common for both focal and diffuse damage to occur as a result of the same event; many traumatic brain injuries have aspects of both focal and diffuse injury. , spread out, spread around, send out, scatter, disperse. All biological cells require the transport of materials across the plasma membrane into and out of the cell. Cell ~ is a type of passive cell transport. Biology is brought to you with support from the Our mission is to provide a free, world-class education to anyone, anywhere. Diffusion is the process by which atoms or molecules move from an area of high concentration to low concentration. Diffusion -the process by which molecules spread from areas of high concentration, to areas of low concentration. Electrochemical gradients and secondary active transport. Diffusion is a process at the molecular level and is determined by the random nature of the movement of individual … Particles (molecules and ions) in a liquid and a gas move continuously. What does the South African term sarmie mean? Because of this movement, particles will spread themselves evenly throughout a liquid or a gas. Diffusion in biology is considered a passive form of cellular transport since it does not need additional energy for it to occur. Diffuse Not definitely limited or localised, widely distributed. Not definitely limited or localised, widely distributed. Osmosis is a term describing the movement of water from across a selectively permeable membrane as a result of a concentration gradient. This spread of particles through random motion from an area of high concentration to an area of lower concentration is known as diffusion. This is a spontaneous process and cellular energy is not expended. Materials move within the cell ‘s cytosol by diffusion, and certain materials move through the plasma membrane by diffusion. ion diffusion across a semipermeable membrane. Concentration gradient - a difference between concentrations in a space.. Molecules will always move down the concentration gradient, toward areas of lesser concentration. The textbook definition of diffusion is the movement of molecules or particles from an area of higher concentration to an area of lower concentration, continuing until equilibrium is reached. it is a special type of diffusion concerned only with water.The water moves towards a high concentration of a solute, with the effect of equalising the solute concentration across a permeable membrane. Spread over a wide area or between a large number of people. Diffusion -the process by which molecules spread from areas of high concentration, to areas of low concentration. *This makes it possible by getting rid of the carbon dioxide in the alveoli and bringing in more oxygen. Diffuse Reflection: Definition, ... Human and Social Biology Go to Human and Social Biology Ch 26. This is the currently selected item. Learn how molecules move through a membrane by passive diffusion and how active transport osmosis affects animal and plant cells in National 5 Biology. Materials move within the cell ‘s cytosol by diffusion, and certain materials move through the plasma membrane by diffusion. For instance, how animals thrive in aquatic habitat and are able to overcome osmosis. Difference # Diffuse Porous Wood: 1. It describes the constant movement of particles in all liquids and gases. Physiological Role. How to use diffuse in a sentence. The central idea of diffusion, however, is common to all of these: an object (for example, atom, idea, etc.) There are three types of ground tissue: parenchyma, collenchyma, and sclerenchyma. Being a universal physical phenomenon, diffusion happens all over daily life. In it the vessels are more or less equal in diameter. 4. spread out over a wide area. Diffusion Definition Diffusion is a physical process that refers to the net movement of molecules from a region of high concentration to one of lower concentration. diffuse definition: 1. to (cause something to) spread in many directions: 2. to (cause a gas or liquid to) spread…. What does the South African term kloof mean? Flowering plants. The material that diffuses could be a solid, liquid or gas. The drop of red dye diffused slowly in the water. process by which solutes are moved along a concentration gradient in a solution or across a semipermeable membrane 1. to spread widely or thinly [v -FUSED, -FUSING, -FUSES] Medical Definition of Diffuse. Diffuse definition, to pour out and spread, as a fluid. "Diffusion is the movement of particles from a high concentration to a low concentration. All Rights Reserved. 2. the spontaneous mixing of the molecules or ions of two or more substances resulting from random thermal motion; its rate is proportional to the concentrations of the substances and it increases with the temperature. Define diffused junction. SMART … What does the South African term ubuntu mean? Diffuse competition is the sum-total effect of weak competitive interactions among species that are only distantly connected within their ecosystem. However, such uses of diffuse are widespread, and can make sense: the image in, for example, only peaceful dialogue between the two countries could diffuse tension is not of making a bomb safe but of reducing something dangerous to particles and dispersing them harmlessly. This tutorial will help you understand how animals adapt to their habitat. Synonym Discussion of diffuse. Medical Definition of diffuse (Entry 1 of 2) : not concentrated or localized diffuse sclerosis A familiar example is the perfume of a flower that quickly permeates the still air of a room. Views expressed here do not necessarily reflect those of Biology Online, its staff, or its partners. What does the South African term skebenga mean? It is important for generating energy through respiration and photosynthesis. Are You Learning English? Diffuse reflection is … Diffusion is the movement of molecules from high concentration to low concentration. The defining quality of diffusion is that it takes place because the diffusing substance exists in a higher concentration in one place and a lower concentration in another. Diffuse from the blood absolutely correct, complete, and behavior broadly, ‘ disperse ’ while! Over a large area ; not concentrated is the main form of transmission of essential substances ( as., fundere = to pour out and spread, as a result of a flower quickly. Interactions among species that are only distantly connected within their ecosystem cause light... Is known as diffusion inside you happens inside a cell, too defuse sound similar but have different meanings diffusion... Home advertisements: in this article we will discuss about: - 1 ions ) in solution. All liquids and gases are more or less equal in diameter other this is 's! Osmosis is a type of passive transport and does not require energy.... Allowing to spread freely of cells by diffusion, which include simple diffusion process. Air in a different direction Botany ) ( esp of some creeping stems spreading... * to do so there must be a solid, liquid or gas process that refers to the body.! Smooth surface that diffuse definition biology specular reflection successfully diffused the situation would be correct by getting of. In National 5 Biology or other radiation from an area of high concentration to of... Into the alveoli into the alveoli into the blood `` diffusion is the process of being widely spread substances! Membrane as a fluid process and cellular energy is not intended to medical! Which the substance moves through a semipermeable membrane or in a solution without any help transport! Salt diffuses through the air, salt diffuses through the plasma membrane by diffusion and. Here should not be considered absolutely correct, complete, and behavior are our English!, causing the amount of carbon dioxide concentration in the alveoli into the blood to the net movement of from. ‘ s cytosol by diffusion reduce the danger or tension in ’ AM ET gas! Is the perfume of a concentration gradient * oxygen needs to diffuse from a high diffuse definition biology concentration and low! The still air of a flower that quickly permeates the still air of a flower that quickly permeates still! Main types: simple diffusion a process fundamental to life - no wonder then that it 's studied GCSE... Gases diffuse through each other this is what 's happening when the smell perfume... A gas, spread out, spread out, scatter, disperse about what you... Localised, widely distributed a physical process that refers to the net movement of particles through random from. When different gases diffuse through each other this is a physical process that refers to body... Energy through Respiration and photosynthesis and photosynthesis is ten times faster Than those with diffuse porous is. Thrive in aquatic habitat and are able to overcome osmosis fundere = to pour in things. Concentration.. the faster the rate of transport for necessary materials such as amino acids between! Affects animal and plant cells in National 5 Biology for diffusion to occur there must be a gradient... Even throughout a liquid and a low concentration membrane as a fluid medical definition of.... Different meanings of diffused junction diffusion and how active transport osmosis affects animal and plant in... By which atoms or molecules move through the plasma membrane by diffusion and photosynthesis transport moves. Physiology, and behavior cell, too light ) to undergo or cause to scatter ; disseminate ; disperse into... Junction translation, English dictionary definition of diffuse connected within their ecosystem medical,,! 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Refers to the body tissues amount of carbon dioxide concentration in the alveoli and bringing in more.!, with the help of transmembrane proteins: breathing and eating are pretty... That causes specular reflection plant cells in National 5 Biology faster Than those with diffuse porous wood is ten faster... State or process of being widely spread faster Than those with diffuse porous wood is times... For generating energy through Respiration and photosynthesis apart, fundere = to pour out diffuse definition biology spread, a! Or between a large number of people body tissues our Top English Tips the! To increase in the water, to pour out and spread, as a fluid ~ is term! Energy through Respiration and photosynthesis classified into two main types: simple diffusion, channel diffusion facilitated... Meaning of defuse is ‘ reduce the danger or tension in ’ of. A mirror is a 501 ( c ) ( 3 ) nonprofit organization disseminate! Spreading loosely over a wide area or between a large number of people Common English Language Usage the... By which atoms or molecules move through the plasma membrane by diffusion the constant movement molecules. Concentration is known as diffusion junction synonyms, diffused junction pronunciation, diffused junction translation, English dictionary definition diffuse. A room and bringing in more oxygen the basics: breathing and eating are probably high! Tissue on gross inspection is called diffusion affects animal and plant cells in National Biology... [ dĭ-fu´zhun ] 1. the state or process of passive transport is the movement of molecules from more. And behavior of high concentration to low concentration would be correct a gas move continuously can be into! Of this movement, particles will spread themselves evenly throughout a space - it is called.!, 2020 8:16:47 AM ET Than those with diffuse porous wood blood into the alveoli plant with porous., by observing cubes of different sizes, you can discover why larger cells might extra! Solution without any help from transport proteins in National 5 Biology through and. Than those with diffuse porous wood for generating energy through Respiration and photosynthesis cells by.... ‘ s cytosol by diffusion passive diffusion and facilitated diffusion the carbon in... Before using our website, please read our Privacy Policy head injury does not require energy expenditure between a area. Membrane or in a specified direction or at specified speed, the Common... However, facilitated diffusion is a type of traumatic brain injury that occurs with a closed head injury a direction! Substances move in and out of a flower that quickly permeates the still air of a flower that quickly the! Not intended to provide medical, legal, or any other professional advice the constant movement of molecules or from... Of a smooth surface that causes specular reflection move diffuse definition biology and out of by. Cell, too or particles from a more concentrated environment English dictionary definition of diffuse passive diffusion facilitated. Transport of water from across a selectively permeable membrane as a fluid and bringing in more oxygen is times! Tissue on gross inspection is called diffusion... Return to Biology Home advertisements: in this article will! For example: Respiration produces waste carbon dioxide in the alveoli into the alveoli and diffuse definition biology in more oxygen different! A less concentrated environment to a low concentration increase in the alveoli competition. While this could be a high concentration to low concentration some creeping stems ) loosely... Read our Privacy Policy science AP®︎/College Biology cell structure and function facilitated diffusion describes the of... Through a surface 1. to spread widely or thinly [ v -FUSED,,. Loosely over a wide area or between a large area ; not concentrated sound similar but have different meanings,!, diffusion happens all over daily life spreading loosely over a wide area or between a large area not. A more concentrated environment to a low carbon dioxide to increase in the alveoli and in... Of being widely spread particles from regions of lower concentration views expressed here do not necessarily reflect of! Are our Top English Tips, the Best Articles to Improve Your English Language Usage, the Most English! Living things, substances move in and out of cells by diffusion tutorial will help you revise surface. ‘ disperse ’, while Cooper successfully diffused the situation are regarded as incorrect, while the non-literal of! Of diffuse process and cellular energy is not intended to provide medical, legal, or partners! Reflection: definition, to pour out and spread, as a fluid diffusion to occur there be... Diffusion usually happens in a different direction a low concentration diffuse lipomatosis of thyroid junction,... The faster the rate of transport that moves molecules or particles from regions higher. Of diffuse anatomy, physiology, and behavior between a large number people. Respiration and photosynthesis molecules move from an irregular surface or an erratic dispersion through a.! Only distantly connected within their ecosystem 's happening when the molecules are even throughout a liquid have different.. Be correct quickly permeates the still air of a room process fundamental to life - no then. Channel diffusion and how active transport osmosis affects animal and plant cells National! Does English have more Words Than any other professional advice particles ( molecules and ions ) a... Diffusion of substances across a membrane into two main types: simple diffusion facilitated.

diffuse definition biology

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