which of the following best explains diffusion?

tonicity: the amount of solute in a solution. Diffusion Explained with Food Coloring | 3M Science at Home Therefore, muscle cells have numerous: Which statement regarding the smooth endoplasmic reticulum (SER) is false? Does it move differently in the hot water than the cold water? The latter may be 0.5 um while the former may be 100 um (which is more than 10X in comparative size). A cell is isotonic to the surrounding 4% dextrose solution. fats and proteins yield too much energy for the cells to process. The sodium-potassium pump transports sodium out of and potassium into the cell in a repeating cycle of conformational (shape) changes. How, exactly, does the sodium-potassium pump establish a voltage across the membrane? Which of the following best explains why tea plantations are common in Sri Lanka and tea exports are important to the country's economy? The rate of diffusion of a gas across a surface is controlled by the following: k, the gas diffusion constant; A, the area for gas exchange; P2-P1, the difference in partial pressure of gas on either side of diffusion barrier; D, the distance across which the gas must diffuse (thickness of diffusion barrier) When the roommate told the Emergency Department doctor what had happened, the doctor quickly began administering IV (intravenous) fluids. The two images represent different agricultural land survey patterns. Secondary active transport involves the movement of water by osmosis into a cell. What is transported across a membrane during osmosis? The first image shows a long-lot survey method with a linear settlement pattern, and the second image shows a metes-and- bounds survey method with a dispersed settlement pattern. (a) Osmosis UEE Main-2020 (Septeimbern) (c) Diffusion (b) Reverse osmosis (d) Dialysis 26. thank you. Overall, there are more positive charges on the outside of the membrane than on the inside. For instance, most of a red blood cells energy is used to maintain internal sodium and potassium levels that differ from those of the surrounding environment. Biology Dictionary. diffusion: [noun] the state of being spread out or transmitted especially by contact : the action of diffusing. Learn more about how this experiment is based in NGSS Disciplinary Core Ideas. Direct link to Stocke's post Why does the diffusion of, Posted 7 years ago. Diffusion happens slowly and only across the small surface of interaction between the two fluids. What do you predict will happen to the person's cells? Diffusion is a physical process that refers to the net movement of molecules from a region of high concentration to one of lower concentration. & y_2^{\prime}=12 y_1 \\ Which of the following best explains the Green Revolution's highly variable level of success in increasing agricultu. Red blood cells behave the same way (see figure below). In biological systems, diffusion occurs at every moment, across membranes in every cell as well as through the body. Which statement displays the address of the variable num1? Direct link to zykeriaprice2's post what is the main differen, Posted 7 years ago. The cell membrane lets certain substances enter the cell and keeps certain substances out of the cell. Water leaves the cells and the cells shrink. This process requires some form of chemical energy. The protein can be toggled back and forth between these forms by the addition or removal of a phosphate group, which is in turn controlled by the binding of the ions to be transported. C. rough endoplasmic reticulum This is also seen when two liquid reactants are mixed with one another. "Diffusion." For example, if a block of dry ice (carbon dioxide in solid form) is placed inside a box, carbon dioxide molecules in the center of the block mostly collide with each other and get retained within the solid mass. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out. Mr. Weddington was admitted to the hospital with chronic heart failure. Increase C. Decrease D. It would depend on the nature and temperature of the coolant, 3. If there was a coolant near the mouth of a crucible heating iodine how would that affect its rate of diffusion? Because a solute moving down its concentration gradient is spontaneous. The concentration of sodium ions is lower inside the cell than in the extracellular fluid, while the reverse is true for potassium ions. Do you think the temperature of the food coloring might have an effect on how it diffuses? How is the , Posted 7 years ago. To extend the example given above, if the block of dry ice is broken into multiple pieces, the area that interacts with the atmosphere immediately increases. The rate of this movement depends on the energy of the . Facilitated diffusion requires the assistance of proteins. An example of this is the way the noxious smell of ammonia gas spreads in air. One of the main characteristics of . What type of cellular extension have you observed? Microtubules are composed of protein subunits known as: Through the microscope, you see cells swimming. The site owner may have set restrictions that prevent you from accessing the site. This type of transport is known as _____. The Diffusion of Oxygen, Carbon Dioxide, and Inert Gas in Flowing Blood. Lettuce production in the United States is an example of commercial farming. molecules move through transport proteins that have been activated by ATP. B. Your cells have a plasma membrane that helps to guard your cells from unwanted intruders. Even though this is random non-directed movement, with a large bulk, it can create a scenario where there is no net movement of gas from the container. If a route such as a channel or carrier protein is open, sodium ions will move down their concentration gradient and return to the interior of the cell. Which of the following best explains the process illustrated by the image? Domestication of plants and animals evolved in each hearth independently of one another as societies in each area learned and applied the process to local plants and animals. Legal. Why does the diffusion of the solute down its concentration gradient release energy? Which of the following is a characteristic of the cell membrane? Imagine you have a cup that has \(100 \: \text{mL}\) water, and you add \(15 \: \text{g}\) of table sugar to the water. Imagine you're preparing a barbecue of grilled chicken and salad for friends. What part of a cell membrane is usually in contact with the interstitial fluid? C. Diffusion provides ciphertext heterogeneity, while confusion provides algorithm This problem has been solved! Which Of The Following Best Explains Diffusion Quizlet? Which of the following explains the diffusion and successful cultivation of many plants and animals in new regions of the world through the Columbian Exchange? Since diffusion is powered primarily by the probability of molecules moving away from a region of higher saturation, it immediately follows that when the medium (or solvent) has a very low concentration of the solute, the probability of a molecule diffusing away from the central area is higher. Her much more prepared A&P student roommate quickly realized the problem and called an ambulance. A cell is placed into a 3% dextrose solution. This experiment was selected for Science at Home because it teaches NGSS Disciplinary Core Ideas, which have broad importance within or across multiple science or engineering disciplines. The end result is an equal concentration, or equilibrium, of molecules on both sides of the membrane. Explain why and how passive transport occurs; Understand the processes of osmosis and diffusion; Define tonicity and describe its relevance to passive transport; Plasma membranes must allow certain substances to enter and leave a cell, while preventing harmful material from entering and essential material from leaving. Main difference: In facilitated diffusion, the solute moves down the concentration gradient, from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. A. Golgi apparatus Adult should review each experiment and determine what the appropriate age is for the students participation in each activity before conducting any experiment. The images shown illustrate a change that took place as the Second Agricultural Revolution coincided with the Industrial Revolution. Tea plantations were established in Sri Lanka by a former European colonial power. In its outward-facing form, the pump switches allegiances and now really likes to bind to (has a high affinity for) potassium ions. While this could be facilitated by other molecules, it does not directly involve high-energy molecules such as adenosine triphosphate (ATP) or guanosine triphosphate (GTP). Simple diagram of a symporter (carrying two molecules in the same direction) and an antiporter (carrying two molecules in opposite directions). For instance, in the example about the diffusion of iodine gas, if the crucible is placed in another closed container and iodine crystals are heated for an extended period of time, the rate at which the purple gas seems to disappear at the mouth of the crucible will reduce. For cell transport, diffusion is the movement of small molecules across the cell membrane. Conversely, in active transport, the solute moves against the concentration gradient, from regions of lower to higher concentration. Anatomy and Physiology Chapter 14 & 15 Hw/Qui, Subject pronouns and at verb's conjugation ch, Mastering A&P Chapter 3 - Cells: The Living U, David N. Shier, Jackie L. Butler, Ricki Lewis, Organizational Behavior: Managing People and Organizations, Jean Phillips, Ricky W. Griffin, Stanley Gully. Solved Which of the following BEST explains the difference - Chegg Osmosis is the diffusion of water molecules across a semipermeable membrane from an area of lower concentration solution (i.e., higher concentration of water) to an area of higher concentration solution (i.e., lower concentration of water). When the sodium ions bind, they trigger the pump to hydrolyze (break down) ATP. he Na+\mathrm{Na}^{+}Na+concentration of a solution was determined by measurement with a sodium ion-selective electrode. Active transport works by using a phosphate group from ATP to change the shape of the protein and thus do work. One of the main characteristics of diffusion is the movement of molecules along the concentration gradient. Passive transport is a way that small molecules or ions move across the cell membrane without input of energy by the cell. In less developed countries, pesticides are typically applied by hand, whereas pesticides are typically applied by tractors or aircraft in more developed countries. This means that the dry ice (or even regular ice) will evaporate faster on a warmer day, simply because each molecule is moving with greater energy and is more likely to quickly escape the confines of a solid state. Which of these statements about diffusion of molecules is true? Diffusion is the process of movement of molecules under a concentration gradient. Diffusion through a membrane | Cell Structure Quiz - Quizizz A vesicle fuses with the plasma membrane and releases its contents to the extracellular fluid. The two images show different agricultural methods. Human Anatomy & Physiology- MyLab & Mastering AandP- Ch 03 HW An open door is completely permeable to anything that wants to enter or exit through the door. Imagine now that you have a second cup with \(100 \: \text{mL}\) of water, and you add \(45 \: \text{g}\) of table sugar to the water. a.QH=500kW,QC=100kWb.QH=500kW,Wcycle=250kW,QC=200kWc.Wcycle=350kW,QC=150kWd.QH=500kW,QC=200kW\begin{array}{l}{\text { a. } The membrane connections that prevent the leaking of fluid between cells are called ________. The gradient is steep enough that potassium ions will move out of the cell (via channels), despite a growing negative charge on the interior. Nerve cells do not have centrioles. This barrier is called the plasma membrane, or cell membrane. "Permeable" means that anything can cross a barrier. What do you predict will happen to the person's cells? The sodium-potassium pump uses ATP to move sodium and potassium ions across the plasma membrane. It is simply the statistical outcome of random motion. Feedlots can minimize costs associated with livestock production because feedlots do not use as much space as cattle ranching. Some molecules can go through the cell membrane to enter and leave the cell, but some cannot. A. In this conformation, the pump no longer likes to bind to sodium ions (has a low affinity for them), so the three sodium ions are released outside the cell. Pour all of the water down the sink, and wash out the glasses. Invention of the plow eased the intensive use of labor, and the innovation of mechanized farm equipment led to improved food production. movement of molecules from an area of high concentration to an area of low concentration Which of the following is most likely to move through the cell membrane by facilitated diffusion? shouldn't it be positively charged? A solution that contains fewer solutes than the cell is ________ to the cell. movement of molecules from an area of high concentration to an area of low concentration. The molecules move from a region of higher concentration to a region of lower concentration until the concentration becomes equal . Agricultural settlement patterns are partly determined by the survey system used to organize landownership. If the outside environment of a cell is water-based, and the inside of the cell is also mostly water, something has to make sure the cell stays intact in this environment. Solution A contains 1% glucose, solution B contains 5% glucose. Each of these factors, independently and collectively can alter the rate and extent of diffusion. Water is attracted to the compartment with a lower osmotic pressure. One and a Half Century of Diffusion: Fick, Einstein, before and beyond. Which of the following best explains why farmers would plant both strawberries and watermelons in the same field? Direct link to Samuel Mayer's post In an antiporter it uses , Posted 7 years ago. Direct link to Eshita's post No, because the potassium, Posted 7 years ago. Which of the following is not required for osmosis to occur? Here, well look in more detail at gradients of molecules that exist across cell membranes, how they can help or hinder transport, and how active transport mechanisms allow molecules to move against their gradients. A&P HW 5 Flashcards | Quizlet Solution A and solution B are separated by a semipermeable membrane. If for example there are alot of sodium ions outside, their positive charges will repel and like atoms don't like being near eachother so they flow to the other side if there's a way to. This increases the rate at which solute and solvent molecules move, and increases collisions. Never needs the presence of any other molecule C. Diffusion of every molecule is dependent on its concentration gradient and independent of the concentration of other molecular species in the medium D. All of the above, 2. Then tap the card to flip it. Type of active transport in which sodium and potassium are pumped across a membrane using ATP, Type of passive process in which water is moved through aquaporins, Type of passive process in which molecules move across the plasma membrane down a concentration gradient, Type of active process in which the cell engulfs extracellular substances by phagocytosis or pinocytosis. When these molecules collide with one another, there is a change in the direction of movement as well as changes to momentum and velocity. yes, dimensions also play a role in the case of transport. Water moves into and out of cells by osmosis. Most lettuce is produced, processed, and packaged for sale in supermarkets that are a significant distance from where the product was grown. Diffusion in the human body is necessary for the absorption of digested nutrients, gas exchange, the propagation of nerve impulses, the movement of hormones and other metabolites towards their target organ and for nearly every event in embryonic development. Secondary active transport uses the energy stored in these gradients to move other substances against their own gradients. Because diffusion happens from high concentration to low concentration, the more molecules are moving, the more opportunities they have to mix together. In each cycle, three sodium ions exit the cell, while two potassium ions enter. \end{aligned} y1=3y2y2=12y1. If you knew the answer, tap the green Know box. He should be given a hypotonic drip to draw fluid out of his cells. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. Examples of molecules that can easily diffuse across the plasma membrane include carbon dioxide and oxygen gas. In general, to maintain homeostasis the relationship between our intracellular and extracellular fluids should be which of the following? Which of the following best explains why in the model the amount of land used for dairying is much smaller than the pasture used for beef cattle? Electrochemical gradients and the membrane potential. ), y1=3y2y2=12y1\begin{aligned} If a cell is in a hypertonic solution, the solution has a lower water concentration than the cell cytosol, and water moves out of the cell until both solutions are isotonic. A process that requires energy to move a substance against its concentration gradient is called: The Na+/K+ pump transports three sodium ions out of the cell for every two potassium ions moved into the cell. The number of molecules that only collide with other carbon dioxide particles within dry ice decreases. Solutions of equal solute concentration are isotonic. The passive process that involves the movement of water through aquaporins is ________. Which of these components add specialized functions to the plasma membrane?