Which of the following best explains the process illustrated by the image? This apparent slowing down is due to the fact that, over time, the larger container begins to have enough iodine gas that some of it will be moving backwards towards the crucible. Requested URL: byjus.com/biology/diffusion/, User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.5060.114 Safari/537.36 Edg/103.0.1264.62. The image is a simple representation of the diffusion of one particle in another medium. this monosaccharide yields the most energy of all macromolecules. When red blood cells are in a hypertonic (higher concentration) solution, water flows out of the cell faster than it comes in. Have you ever colored a picture with marker and noticed that two touching colors begin to bleed together? This can even be observed visually by the addition of different colored dyes to each of the liquids. B. At 3M, we discover and innovate in nearly every industry to help solve problems around the world. All the examples given above were instances of simple diffusion. Which statement displays the address of the variable num1? John David Jackson, Patricia Meglich, Robert Mathis, Sean Valentine, Charles Welsh, Cynthia Prentice-Craver, David Shier, Jackie Butler, Ricki Lewis, Child Psychopathology - Ch 1 Review questions. Which of the following best describes the survey methods used to delineate agricultural land and the associated settlement patterns shown in the tw. An electrical potential difference exists whenever there is a net separation of charges in space. The Diffusion of Oxygen, Carbon Dioxide, and Inert Gas in Flowing Blood. Which of the following best explains diffusion? Obviously, the cell could not survive in such an environment. Channels Channel proteins span the membrane and make hydrophilic tunnels across it, allowing their target molecules to pass through by diffusion. What happens when body cells are placed in a hypertonic solution? With the phosphate group gone, the pump will change back to its original form, opening towards the interior of the cell. Imagine you're preparing a barbecue of grilled chicken and salad for friends. Wipe up any spills that may have happened. movement of molecules from an area of high concentration to an area of low concentration. Direct link to long pham's post if there are more Potassi, Posted 6 years ago. Sheep production in New Zealand and poultry production in Arkansas produce food animals for human consumption. This makes it easier for the dye to get mixed throughout the hot water. Do you think the temperature of the food coloring might have an effect on how it diffuses? Direct link to City Face's post Because a solute moving d, Posted 7 years ago. Imagine this just like a hydroelectric power station uses the energy of water flowing down the waterfall to create electricity. Remember that there is water outside the cell, and the cytoplasm inside the cell is mostly water as well. The cell membrane has pores that let only water and glucose into the cell and carbon dioxide out. Microtubules are composed of protein subunits known as: Through the microscope, you see cells swimming. One phosphate group from ATP is attached to the pump, which is then said to be phosphorylated. Imagine you have a cup that has \(100 \: \text{mL}\) water, and you add \(15 \: \text{g}\) of table sugar to the water. A vesicle fuses with the plasma membrane and releases its contents to the extracellular fluid. What separates the intracellular fluid from the extracellular fluid? 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. If the ECF is more concentrated than the cytosol, then the ECF is: A primary active transport process is one in which __________. At equilibrium, there is equal movement of materials in both directions. In the context of the Second Agricultural Revolution, which of the following trends is represented in these images? Which of the following is the best situation for maintaining homeostasis? Which of the following best explains the potential impact of rising global temperatures on agricultural regions? B. This process takes place in the following steps: To begin, the pump is open to the inside of the cell. If the cell is moved to a 6% dextrose solution, then predict what will happen to the cell. 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. As time progresses, the differential gradient of concentrations between high and low will drop (become increasingly . Na+/K+ pump. Once again, as the concentration of this gas increases within the cell, it diffuses outwards towards capillaries where the force of flowing blood removes the excess gas from the tissue region. 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. Direct link to l's post Questions: Legal. Solutions of equal solute concentration are isotonic. Which of the following statements is best supported by the images? Not everything can make it into your cells. 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 . Red blood cells behave the same way (see figure below). Which of the following organelles will be abundant in liver cells? solute: a substance dissolved in another to form a solution. Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. yes, dimensions also play a role in the case of transport. The molecules move from a region of higher concentration to a region of lower concentration until the concentration becomes equal . Which of the following best explains the significance of similarities between the farming practices for apple orchards and grape vineyards? Water moves into and out of cells by osmosis. how does the antiporter provide energy for molecules to go in the "opposite" direction? This page titled 8.4: Osmosis and Diffusion is shared under a CK-12 license and was authored, remixed, and/or curated by CK-12 Foundation. 0 To produce a mRNA molecule to deliver the genetic instructions outside the nucleus. A solution that contains fewer solutes than the cell is ________ to the cell. What organelle degrades old, worn-out organelles and cell components? Simple diffusion is merely the movement of molecules along their concentration gradient without the direct involvement of any other molecules. Which of the following is used to export large molecules from the cell? Most lettuce is produced, processed, and packaged for sale in supermarkets that are a significant distance from where the product was grown. Which of the following best explains the risks associated with pesticide applications? 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 cotransporter accomplishes this by physically coupling the transport of glucose to the movement of sodium ions down their concentration gradient. Direct link to auzennesylvester92's post Are these pumps negativel, Posted 5 years ago. Which of the following best explains diffusion? Also, think about where you see this happen in other places. Channels are very selective and will accept only one type of molecule (or a few closely related molecules) for transport. If a cell is in a hypertonic solution, the solution has a . Your email address is only used to allow you to reset your password. Which of the following best explains diffusion? The cell membrane lets certain substances enter the cell and keeps certain substances out of the cell. Lipids do not mix with water (recall that oil is a lipid), so the phospholipid bilayer of the cell membrane acts as a barrier, keeping water out of the cell, and keeping the cytoplasm inside the cell. 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. The rate of this movement depends on the energy of the molecules. Direct link to Samuel Mayer's post In an antiporter it uses , Posted 7 years ago. And sodium is highly concentrated outside of the cell, so that's where it goes during active transport considering it is low to high concentration. molecules move through transport proteins that have been activated by ATP. However, for molecules in the periphery, rapidly moving molecules in the air also influence their movement, allowing them to diffuse into the air. Diffusion. Though water is a polar molecule, it can also diffuse through the plasma membrane. The three main kinds of passive transport are diffusion (or simple diffusion), osmosis, and facilitated diffusion. Option C is the correct answer because Cultural divergence (CD) happens when two cultures separate, therefore CD explains the best concept of driving forces of contemporary cultural diffusion. Secondary active transport involves the movement of a substance into a cell through a protein channel with its concentration gradient. Which of the following correctly explains the relationship between wheat and its early hearth of domestication? An open beaker of water in equilibrium with water vapour is in a sealed container. One and a Half Century of Diffusion: Fick, Einstein, before and beyond. Active transport mechanisms can be divided into two categories. This example also shows that the diffusion of any one material is independent of the diffusion of any other substances. Dairy cows must be kept close to farmhouses, as they require daily milking, and milk must be produced close to consumers, as it is highly perishable. Because diffusion happens from high concentration to low concentration, the more molecules are moving, the more opportunities they have to mix together. The cell membrane allows the cell to stay structurally intact in its water-based environment. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. Farmers in less developed countries were able to increase their profits from growing and exporting high-yield grain to levels similar to those in more developed countries. The mixture of a solute in a solvent is called a solution. What do you predict will happen to the person's cells? In general, the inside of a cell has a higher concentration of potassium (K, If sodium ions are outside of a cell, they will tend to move into the cell based on both their concentration gradient (the lower concentration of Na, The combination of concentration gradient and voltage that affects an ions movement is called the. Background. The same gas would diffuse slightly more slowly in a liquid such as water and slowest in a solid. Her much more prepared A&P student roommate quickly realized the problem and called an ambulance. What process permits absorption of glucose into cells? At equilibrium, movement of molecules does not stop. For example, how might this play into why coffee and tea always start with hot water? What is transported across a membrane during osmosis? This creates a concentration gradient, with concentration of carbon dioxide gradually decreasing with distance from the lump of dry ice. You now add the two solutions to a beaker that has been divided by a semipermeable membrane, with pores that are too small for the sugar molecules to pass through, but are big enough for the water molecules to pass through. Simple diffusion is relevant in chemical reactions, in many physical phenomena, and can even influence global weather patterns and geological events. The membrane has pores and openings to allow the passage of specific molecules. Through a process of passive diffusion, without the active involvement of any other molecule oxygen passes through the capillary membrane and enters cells. What type of membrane junction allows ions to pass directly from the cytoplasm of one cell to the cytoplasm of the adjacent cell? Which of the following best explains diffusion? 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. Typically, diffusion refers to the movement of molecules from high concentrations to lower concentrations. C. movement of molecules from an area of high concentration to an area of low concentration. Water moves into and out of cells by osmosis. The Green Revolution led to an increase in food production in many places around the world, but there have been some negative consequences. This process requires some form of chemical energy. Several large cities on the East Coast provide a growing market and shorter distances for transporting market gardening products. Allison Soult, Ph.D. (Department of Chemistry, University of Kentucky). Question 12 30 seconds Q. This can occur with all sorts of matter, but is most commonly observed in liquids and gases. 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. tonicity: the amount of solute in a solution. The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. Direct link to priciaauy's post why wouldnt cells use atp, Posted 4 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. This is because in hot water, the water molecules have more energy and are moving faster than the molecules of cold water. This voltage will be maintained as long as K, For more explanation of how the voltage across the membrane is established, take a look at the. What will happen to a freshwater fish in the ocean? To see how well you know the information, try the Quiz or Test activity. answer choices The greater the difference in concentration, the quicker the rate of diffusion. Examples of molecules that can easily diffuse across the plasma membrane include carbon dioxide and oxygen gas. A substance moves by facilitated diffusion into a cell. Learn more about how this experiment is based in NGSS Disciplinary Core Ideas. C. Extracellular fluid should be isotonic to intracellular fluid. The majority of water molecules moving across plasma membranes by osmosis do so via a process that is most similar to ____. Agricultural technology has increased the economy of scale and the carrying capacity of feedlots, increasing profits for the farmer. Even in large industrial reactions, when two liquids are mixed together, diffusion brings the reactants together and allows the reaction to proceed smoothly. Farmers' health is at risk in less developed countries, whereas environmental pollution is a risk in more developed countries. When oxygen is moving towards tissues from capillaries, carbon dioxide is entering the bloodstream. There are certainly more numbers of potassium ions in the cells, but remember that there are greater numbers of sodium ions outside the cell (since for every three sodium ions moved out of the cells, two potassium ions enter the cell), therefore, resulting in a net positive charge outside the cell and net negative charge inside the cell. A. Which of the following best describes advances in the production of textiles during the Second Agricultural Revolution and the Industrial Revolution? Biology Dictionary. Which of the following best explains the differences between the patterns of land use in the township-and-range system and the long-lot system, as shown in the images? ; Diffusion occurs in liquids and gases when their particles collide randomly and . The gradient is steep enough that potassium ions will move out of the cell (via channels), despite a growing negative charge on the interior. The cell is therefore not completely permeable. When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Diffusion is the movement when molecules move from higher concentrated area to lower concentrated area. No tracking or performance measurement cookies were served with this page. answer choices The English language initially diffused to North America through the process of relocation diffusion. C. The IV fluid should be hypertonic to the patient's blood. A number of colonies were established and settled by people from Great Britain. Direct link to Ivana - Science trainee's post yes, dimensions also play. Which of the following scenarios best explains the Columbian Exchange? Actually, Sodium does go down its gradient but through specialized Sodium channels. This is an example of: Resting membrane potential is due to unequal concentrations of: Two types of active transport via vesicles are: Which of the following best describes secondary active transport? Both systems require geometric calculations to survey property lines. Typically, diffusion refers to the movement of molecules from high concentrations to lower concentrations. Grocery stores sell oranges that are grown in locations with similar climates but different growing seasons. It mainly occur in liquid and gaseous substance as their particle can easily move from one place to another.
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