At 3M, we discover and innovate in nearly every industry to help solve problems around the world. B. Based on the different types of land use shown in the image, which of the following best explains why soil salinization is a concern in the arid landscape shown? Spontaneous activity releases energy, non-spontaneous activity (like moving something against its concentration gradient) requires energy. fats and proteins yield too much energy for the cells to process. synthesize ATP, Which of the following organelles synthesizes proteins? What part of a cell membrane is usually in contact with the interstitial fluid? Direct link to William H's post If for example there are , Posted 5 years ago. Facilitated diffusion is powered entirely by GTP hydrolysis B. B. ribosome In comparing two solutions of unequal solute concentration, the solution with the higher solute concentration is hypertonic, and the solution with the lower solute concentration is hypotonic. In its outward-facing form, the pump switches allegiances and now really likes to bind to (has a high affinity for) potassium ions. B. smooth endoplasmic reticulum Similarly, two miscible liquids will also diffuse into each other to form a uniform solution. Direct link to Dovid Shaw's post how does the antiporter p, Posted 7 years ago. For each of the following cases, determine whether the cycle operates reversibly, operates irreversibly, or is impossible. Put the food coloring back where you found it. This results in swelling of the cell and potential hemolysis (bursting) of the cell. sideropenia _____________________________________________________. Similarly, the medium in which diffusion occurs could also be in one of the three physical states. Solved 1. Which of the following best explains how water - Chegg 1. What will happen to a freshwater fish in the ocean? Which of these statements about diffusion of molecules is true? Which of the following substances must travel across a membrane via facilitated diffusion? 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. Fish cells, like all cells, have semipermeable membranes. As an example, while gases and small molecules like methane or water can diffuse freely across a plasma membrane, larger charged molecules like carbohydrates or nucleic acids need the help of transmembrane proteins forming pores or channels. Simple diffusion can be disrupted if the diffusion distance is increased. 266X15aX+baY+32b. Which of the following solutions contains the most solute? Which of the following best explains diffusion? No tracking or performance measurement cookies were served with this page. Which of the following is NOT one of the functions of the cytoskeleton? When these molecules collide with one another, there is a change in the direction of movement as well as changes to momentum and velocity. Na+/K+ pump. The membrane connections that prevent the leaking of fluid between cells are called ________. The best explanation for the diffusion of plants and animals from their hearths of domestication is option C. Contagious diffusion in the early years was a way of spreading from one person to the other. The Green Revolution led to an increase in food production in many places around the world, but there have been some negative consequences. To see how well you know the information, try the Quiz or Test activity. Retrieved from https://biologydictionary.net/diffusion/. Channels are very selective and will accept only one type of molecule (or a few closely related molecules) for transport. C. peroxisome Imagine you have a cup that has \(100 \: \text{mL}\) water, and you add \(15 \: \text{g}\) of table sugar to the water. Direct link to Ivana - Science trainee's post Because it is faster to u, Posted 7 years ago. Which cell junctions prevent substances from passing between adjacent cells? Township and range: unit-block field patterns with dispersed farmsteads and occasional villages. How is the , Posted 7 years ago. Question 16 30 seconds Q. Active transport mechanisms can be divided into two categories. Just like the first cup, the sugar is the solute, and the water is the solvent. 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. movement of molecules from an area of high concentration to an area of low concentration. The images shown illustrate a change that took place as the Second Agricultural Revolution coincided with the Industrial Revolution. Agricultural technology has increased the economy of scale and the carrying capacity of feedlots, increasing profits for the farmer. To unpackage and unwind DNA so that enzymes can access the individual genes. Direct link to Sam's post 1) The "sodium/glucose sy, Posted 7 years ago. If you knew the answer, tap the green Know box. Because of the increased capital investment required to produce new crop varieties using technology that was pioneered in more developed countries, there was an increase in wealth disparity in many farming communities in less developed countries. This allows red blood cells to carry oxygen all over your body. The reaction proceeds towards completion at a faster rate. One and a Half Century of Diffusion: Fick, Einstein, before and beyond. Direct link to Yuya Fujikawa's post Hi, I'm just a little cur, Posted 5 years ago. If a cell is in a hypertonic solution, the solution has a . Which of the following best explains the potential impact of rising global temperatures on agricultural regions? If you're seeing this message, it means we're having trouble loading external resources on our website. 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 . The three main kinds of passive transport are diffusion (or simple diffusion), osmosis, and facilitated diffusion. In this form, the pump really likes to bind (has a high affinity for) sodium ions, and will take up three of them. Which of these statements is NOT true? this is in relation to the electrochemical gradient section. C. Extracellular fluid should be isotonic to intracellular fluid. The sodium-potassium pump uses ATP to move sodium and potassium ions across the plasma membrane. Which of the following processes require the use of protein carrier molecules? Allison Soult, Ph.D. (Department of Chemistry, University of Kentucky). Labor-intensive farming of vegetables is done in small-scale plots in market gardens, while extensive grain crops are grown in large-scale fields far from the market town. At this point, equilibrium is reached. Simple diffusion is merely the movement of molecules along their concentration gradient without the direct involvement of any other molecules. Look at the large card and try to recall what is on the other side. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. Solved Which of the following BEST explains the difference - Chegg Diffusion helps in the movement of substances in and out of the cells. If sublimation is carried out in a narrow crucible, the fumes diffuse slowly out towards the mouth of the container and then rapidly disappear. The cell is therefore not completely permeable. A. The IV fluid should be isotonic to the patient's blood. i dont quite understand the secondary active transport. If you find an example of where hot or cold water is used for something that might involve diffusion, see if you can try it with the opposite and observe any differences in the results. Image 2 shows an innovation that occurred in the Second Agricultural Revolution, reducing the amount of labor needed and increasing crop yields. in a symporter it makes sense that the flow of one ion should cause other molecules to go along with it, however in an antiporter, what causes the other molecule to move up its conc. Grain farming is an extensive farming practice that can maximize profits in part by lower land costs, lower transportation costs, and imperishability of the product. What is the basic difference between simple diffusion and facilitated diffusion across a cell membrane? When deoxygenated blood is in your capillaries in your lungs, the oxygen in your lungs diffuses from a higher concentration in your lungs to the lower concentration in your blood. Molecules that cannot easily pass through the bilayer include ions and small hydrophilic molecules, such as glucose, and macromolecules, including proteins and RNA. Answer: Random movement of molecules is not fast enough to disperse through the larger eukaryotic cell volume, Explanation: Eukaryotic clels are much bigger than prokaryotic cells. Describe flow of solvent molecules across a membrane. In simple diffusion, this process proceeds without the aid of a transport protein. QUESTION 28 Which of the following best explains the role of transcription in a cell? Conversely, in active transport, the solute moves against the concentration gradient, from regions of lower to higher concentration. AP human test | Geography Quiz - Quizizz Passive processes that move substances across membranes ________. The SER detoxifies drugs and harmful substances ingested by and produced in the body. With the phosphate group gone, the pump will change back to its original form, opening towards the interior of the cell. solute: a substance dissolved in another to form a solution. Diffusion is the process of movement of molecules under a concentration gradient. Legal. Which of the following best describes the differences in the agricultural practices and land use for these products? A power cycle operating at steady state receives energy by heat transfer at a rate QHatTH=1800K\dot{Q}_{\mathrm{H}} \text { at } T_{\mathrm{H}}=1800 \mathrm{K}QHatTH=1800K and rejects energy by heat transfer to a cold reservoir at a rate QC\dot{Q}_{\mathrm{C}}QC at TC=600K.T_{\mathrm{C}}=600 \mathrm{K}.TC=600K. Which of the following explains why oranges are available. Mastering A&P Chapters 1-3 Flashcards | Quizlet The difference in the concentrations of the molecules in the two areas is called the concentration gradient. Direct link to l's post Questions: (Show the details. Which of the following explains why multiple early hearths of domestication and diffusion of plants and animals arose across the world in Central America, the Fertile Crescent, the Indus River valley, and Southeast Asia? So something must protect the cell and allow it to survive in its water-based environment. If you've accidentally put the card in the wrong box, just tap on the card to take it out of the box.