which of the following best explains diffusion?

Which of these components add specialized functions to the plasma membrane? Which of the following substances must travel across a membrane via facilitated diffusion? This property can be observed even better if the gas has an odor or color. When oxygen is moving towards tissues from capillaries, carbon dioxide is entering the bloodstream. Pour all of the water down the sink, and wash out the glasses. when it releases the ions the pump no longer has a affinity for the molecules, is this because the energy used to change the conformation of the pump knocks off electrons or does the phosphates make the pump more negative due to the negative charges on the phosphates itself? Which Of The Following Best Explains Diffusion Quizlet? In general, to maintain homeostasis the relationship between our intracellular and extracellular fluids should be which of the following? \end{aligned} The electrode system developed a potential of 0.2331V-0.2331 \mathrm{~V}0.2331V when immersed in 10.010.010.0 mL\mathrm{mL}mL of the solution of unknown concentration. movement of molecules from an area of high concentration to an area of low concentration. The mechanization of farm work allowed many young people to migrate and join a growing urban industrial workforce. Actually, Sodium does go down its gradient but through specialized Sodium channels. 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). Muscle cells require an abundant amount of ATP to function. This results in crenation (shriveling) of the blood cell. 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. At 3M, we discover and innovate in nearly every industry to help solve problems around the world. 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. Which of the following is most likely to move through the cell membrane by facilitated diffusion? ADP is released as a by-product. The two images show different agricultural methods. When these molecules collide with one another, there is a change in the direction of movement as well as changes to momentum and velocity. Glucose is the most commonly used energy source by human cells because (Points: 1) this is the most abundant macromolecule available for cellular respiration. In secondary active transport, the two molecules being transported may move either in the same direction (i.e., both into the cell), or in opposite directions (i.e., one into and one out of the cell). The images show examples of agricultural technology developed during different time periods. In less developed countries, pesticides are typically applied by hand, whereas pesticides are typically applied by tractors or aircraft in more developed countries. If you forget it there is no way for StudyStack A substance moves by facilitated diffusion into a cell. What is required for its transport? What would happen if a cell dissolved in water, like sugar does? The phospholipid is a lipid molecule with a hydrophilic ("water-loving") head and two hydrophobic ("water-hating") tails. This may seem like a complicated cycle, but it just involves the protein going back and forth between two forms: an inward-facing form with high affinity for sodium (and low affinity for potassium) and an outward-facing form with high affinity for potassium (and low affinity for sodium). If you knew the answer, tap the green Know box. Also, think about where you see this happen in other places. Because it is faster to utilize already available ATP through the electrochemical gradient. Which of the following is the main component of the cell membrane? A primary active transport process is one in which __________. This barrier is called the plasma membrane, or cell membrane. D. The SER stores calcium ions. The material that diffuses could be a solid, liquid or gas. Direct link to Ivana - Science trainee's post yes, dimensions also play. Which statement displays the address of the variable num1? Explanation: When a substance moves from higher concentrated area to a lower concentrated area, is called as diffusion. 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. 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. This can occur with all sorts of matter, but is most commonly observed in liquids and gases. (2009). A cell is isotonic to the surrounding 4% dextrose solution. Imagine you have a cup that has \(100 \: \text{mL}\) water, and you add \(15 \: \text{g}\) of table sugar to the water. Most lettuce is produced, processed, and packaged for sale in supermarkets that are a significant distance from where the product was grown. Hi, I'm just a little curious, why can't 3 potassium ions be pumped out and 2 sodium ions pumped in(the other way around)? 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? The first sugar solution is hypotonic to the second solution. If you say something, I ll ask someone at what age erectile dysfunction starts to clean it up. What is the basic difference between simple diffusion and facilitated diffusion across a cell membrane? how does the carrier protein "harness" energy from another molecules concentration gradient? The membrane connections that prevent the leaking of fluid between cells are called ________. You can also use your keyboard to move the cards as follows: If you are logged in to your account, this website will remember which cards you know and don't know so that they Cytosol is composed of water and other molecules, including enzymes, which are proteins that speed up the cell's chemical reactions. What will happen to a freshwater fish in the ocean? The molecules move from a region of higher concentration to a region of lower concentration until the concentration becomes equal . It is an important process occurring in all living beings. Which of the following is most likely to move through the cell membrane by facilitated diffusion? At the exact same time, add 2-3 drops off food coloring into each glass. This type of transport is known as _____. Though water is a polar molecule, it can also diffuse through the plasma membrane. PS1.A: Structure and Properties of Matter, PS3.C: Relationship Between Energy and Forces. The sugar dissolves and the mixture that is now in the cup is made up of a solute (the sugar) that is dissolved in the solvent (the water). Similarly, two miscible liquids will also diffuse into each other to form a uniform solution. However, for molecules in the periphery, rapidly moving molecules in the air also influence their movement, allowing them to diffuse into the air. Would remain unchanged B. 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? During the Green Revolution, agricultural practices from more developed countries diffused to less developed countries in Asia and Africa. The liver is an organ that can synthesize lipids, such as cholesterol, and detoxify poisons, such as alcohol. Are these pumps negatively charge since they have a high affinity for the positive ions? Put the food coloring back where you found it. If sublimation is carried out in a narrow crucible, the fumes diffuse slowly out towards the mouth of the container and then rapidly disappear. Predict what will happen to a patient's red blood cells if you give the patient an IV of pure water. 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). Direct link to long pham's post if there are more Potassi, Posted 6 years ago. However, the same phenomenon is not seen when immiscible liquids like petrol and water are mixed together. Diffusion. B. digest and recycle damaged organelles The Green Revolution led to an increase in food production in many places around the world, but there have been some negative consequences. How is the , Posted 7 years ago. Na+/K+ pump. Which of the following best explains why farmers would plant both strawberries and watermelons in the same field? The rate of diffusion depends on the nature of interaction between the medium and material. This is related to both the mass of the molecule and its surface area. As time progresses, the differential gradient of concentrations between high and low will drop (become increasingly . Electrochemical gradients and the membrane potential. The image shows the movement of an insoluble molecule from the extracellular space towards the cytoplasm. To see how well you know the information, try the Quiz or Test activity. A Diffusion provides encryption strength, while confusion provides data integrity B. Diffusion provides function integrity, while confusion provides encryption confidentiality. A. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. Both systems require geometric calculations to survey property lines. All the examples given above were instances of simple diffusion. Which of the following is least likely to increase the rate of diffusion? 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. Background. Which of the following explains how global demand for palm oil has proved beneficial and detrimental f. Palm oil exports provided substantial corporate profits, but the growth in the industry resulted in heavy deforestation in both countries. At this point, equilibrium is reached. All cells have a barrier around them that separates them from the environment and from other cells. Instead of feeling drunk, she felt nauseated, developed a severe headache, began to get confused, and then became unconscious. Which of the following is used to export large molecules from the cell? Can you predict, based on the first way of doing the experiment, what might change, if anything? C. movement of molecules from an area of high concentration to an area of low concentration. The conversion from manual thread spinning to an industrial processing approach led to increased demand for raw cotton in the agricultural sector. Although one of these refers to chemical properties and the latter social interaction, both are examples or diffusion. "Diffusion. No, because the potassium is highly concentrated in the cell, and so that's where the molecules must go(based on active transport going low concentration to high concentration). In other words, plasma . When red blood cells are in a hypertonic (higher concentration) solution, water flows out of the cell faster than it comes in. Diffusion is an important part of many biological and chemical processes. One of the main characteristics of . Simple diffusion is merely the movement of molecules along their concentration gradient without the direct involvement of any other molecules. Do not mix or stir. 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). 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? The pump is now back to where it was in step 1, and the cycle can begin again. Microtubules are composed of protein subunits known as: Through the microscope, you see cells swimming. This way, the capillaries remain at a low carbon dioxide concentration, allowing the constant movement of the molecule away from cells. What transport process can create a concentration gradient for sodium across the plasma membrane? For instance, when iodine is sublimated over a hot stove, purple fumes begin to appear and mix with air. What do you predict will happen to the person's cells? Which of the following is most likely to move through the cell membrane by facilitated diffusion? Prior to this, very few animals had been domesticated in the Americas. Stirring increases the area of interaction between the two chemicals and allows these molecules to diffuse towards each other more quickly. Learn more about how this experiment is based in NGSS Disciplinary Core Ideas. By diffusion: glucose will move from solution B to solution A. Channels are very selective and will accept only one type of molecule (or a few closely related molecules) for transport. What type of membrane junction allows ions to pass directly from the cytoplasm of one cell to the cytoplasm of the adjacent cell? Na+ C. Extracellular fluid should be isotonic to intracellular fluid. Which of the following explains an impact of globalized agricultural commodity chains on consumers as compared to producers? tonicity: the amount of solute in a solution. 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. Which of the following best explains why the New England region, located in the northeastern United States, would specialize in market gardening agriculture rather than other types of agriculture, such as grain farming? Passive processes that move substances across membranes ________. Water moves into and out of cells by osmosis. 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. http://physrev.physiology.org/content/91/2/733, https://phys.org/news/2013-10-mechanism-sodium-potassium-revealed.html. If the alveoli in our lungs fill with fluid (pulmonary edema), the distance the gases must travel increases, and their transport decreases. An open beaker of water in equilibrium with water vapour is in a sealed container. LEFT ARROW - move card to the Don't know pile. Direct link to City Face's post Because a solute moving d, Posted 7 years ago. Everything in the cell sits in the cytosol, like fruit in a Jell-o mold. 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. A solution that contains fewer solutes than the cell is ________ to the cell. Imagine you're preparing a barbecue of grilled chicken and salad for friends. After addition of 1.00mL1.00 \mathrm{~mL}1.00mL of 2.00102M2.00 \times 10^{-2} \mathrm{M}2.00102M NaCl\mathrm{NaCl}NaCl, the potential changed to 0.1846V-0.1846 \mathrm{~V}0.1846V. Calculate the Na+\mathrm{Na}^{+}Na+concentration of the original solution. Which of the following explains one of the negative consequences of the Green Revolution that would be of greater c, Runoff of agricultural chemicals into the local groundwater that pollutes water resources. What assists the movement of substances by facilitated diffusion? This process requires some form of chemical energy. Then tap the card to flip it. For instance, one of the ways in which polyester is synthesized is by mixing the appropriate organic acid and alcohol in their liquid form. The plasma membrane (see figure below) is made of a double layer of special lipids, known as phospholipids. For cell transport, diffusion is the movement of small molecules across the cell membrane. If you've accidentally put the card in the wrong box, just tap on the card to take it out of the box. The brands listed above are trademarks of 3M. Which of the following best explains the reasons for the similarities and differences between the two land survey systems shown? Feedlots can minimize costs associated with livestock production because feedlots do not use as much space as cattle ranching. Which of the following solutions contains the most solute? The higher the temperature, the more kinetic energy the particles will have, so they will move and mix more quickly. Water is attracted to the compartment with a lower osmotic pressure. While this charge ratio does make the cells interior slightly more negative, it actually accounts for only a, Instead, the sodium-potassium pump acts primarily by building up a high concentration of potassium ions inside the cell, which makes potassiums concentration gradient very steep. This example also shows that the diffusion of any one material is independent of the diffusion of any other substances. Which of the following is not a major function of proteins in the cell membrane? On a similar note, any solute that is broken into small pieces and stirred into the solvent dissolves rapidly another indicator of molecules diffusing better when the area of interaction increases. Remember that there is water outside the cell, and the cytoplasm inside the cell is mostly water as well. QUESTION 28 Which of the following best explains the role of transcription in a cell? While they are confined to the smaller surface area within the crucible, the rate of diffusion remains low. 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. Township and range: unit-block field patterns with dispersed farmsteads and occasional villages. answer choices Through the process of ethnocentrism, American culture has spread throughout the world. To log in and use all the features of Khan Academy, please enable JavaScript in your browser. In this experiment, you will experience how temperature affects the mixing of food coloring drops with water. Agricultural settlement patterns are partly determined by the survey system used to organize landownership. Epinephrine diffuses through the plasma membrane; the hormone dimerizes in the cytosol. He should be given a hypotonic drip to draw fluid out of his cells. Can't that serve the same role? The hypertonic solution is one one side of the membrane and the hypotonic solution on the other. The images shown illustrate the differences in scale of production for two methods of producing thread. Domesticated animals such as cattle, horses, pigs, and chickens were introduced to the Americas by European colonizers. Which of the following best describes the impacts of the Second Agricultural Revolution? Which of the following best describes advances in the production of textiles during the Second Agricultural Revolution and the Industrial Revolution? This type of transport is known as _____. Diffusion can either be simple diffusion and be facilitated by another molecule. Your email address is only used to allow you to reset your password. Based on the map above, explain the degree to which lettuce production takes place in the United States. The use of improved plant hybrids and agricultural chemicals. Image 2 shows an innovation that occurred in the Second Agricultural Revolution, reducing the amount of labor needed and increasing crop yields. 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 is the best situation for maintaining homeostasis? Spontaneous activity releases energy, non-spontaneous activity (like moving something against its concentration gradient) requires energy. No tracking or performance measurement cookies were served with this page. & y_2^{\prime}=12 y_1 \\ Which one of the following processes can explain this? On the other hand, facilitated diffusion, as the term indicates, requires the presence of another molecule (the facilitator) in order for diffusion to occur. sideropenia _____________________________________________________. What four steps should you take to reduce your risk for foodborne illnesses? Look at the large card and try to recall what is on the other side. Wheat was first domesticated in Mesopotamia because of a favorable climate and a great diversity of wild grains that led to crossbreeding of seeds. A. Golgi apparatus 60 seconds. (Show the details. Which of the following best describes the survey system used in both locations shown? Midlatitude climates tend to support similar agricultural crops and practices, such as wheat farming in the United States and China. Posted 7 years ago. The cotransporter accomplishes this by physically coupling the transport of glucose to the movement of sodium ions down their concentration gradient. Determine the type of membrane transport used to transport these sodium ions. 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. Have you ever colored a picture with marker and noticed that two touching colors begin to bleed together? Diffusion happens slowly and only across the small surface of interaction between the two fluids. 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. The second sugar solution is hypertonic to the first. It s an accident, and I got a piece of land cheaply. gradient? A. movement of molecules farther away from equilibrium B. exchange of nonpolar molecules for polar molecules C. movement of molecules from an area of high concentration to an area of low concentration D. movement of molecules from where there are fewer of them to where there are more Which of the following best explains how a wheat farmer in the Northern Plains region of the United States is able to maximize profits? At equilibrium, movement of molecules does not stop. & y_1^{\prime}=3 y_2 \\ Which of the following best explains diffusion? Direct link to Zaeen Iqbal's post i dont quite understand t, Posted 7 years ago. Palm oil, an edible vegetable oil used in processing packaged food products, is obtained from the fruit of the oil palm tree, grown only in the tropics. For best results enter two or more search terms. Because of the hydrophilic and hydrophobic nature of the phospholipid, the molecule must be arranged in a specific pattern as only certain parts of the molecule can physically be in contact with water. Active transport mechanisms do just this, expending energy (often in the form of ATP) to maintain the right concentrations of ions and molecules in living cells. At equilibrium, there is equal movement of materials in both directions. Epinephrine binds to a cell-surface receptor; the activated receptor catalyzes the conversion of glycogen to glucose. Here, the cell can't import glucose for free using diffusion, because the natural tendency of the glucose will be to diffuse. Which of the following best explains the Green Revolution's highly variable level of success in increasing agricultu. In this form, the pump really likes to bind (has a high affinity for) sodium ions, and will take up three of them. At that concentration, the solution is isotonic to the cell. Imagine this just like a hydroelectric power station uses the energy of water flowing down the waterfall to create electricity. Technological innovations, such as the devices shown in the images, and increased agricultural productivity led to better diets, longer life expectancies, and more people available for work in factories. It is simply the statistical outcome of random motion. The same gas would diffuse slightly more slowly in a liquid such as water and slowest in a solid. Which of the following best explains the economic advantage of the type of farm-produced goods shown in the images? The end result is an equal concentration, or equilibrium, of molecules on both sides of the membrane. C. The IV fluid should be hypertonic to the patient's blood. Which of the following best explains diffusion? For example, oxygen is at a higher concentration inside arteries and arterioles, when compared with the oxygen levels in actively respiring cells. Facilitated diffusion is necessary for the biochemical processes of every cell since there is communication between various subcellular organelles. Which of the following best explains the importance of climate to agricultural practices? Legal. Which of the following best describes the settlement patterns shown in the images? The concentration of sodium ions is lower inside the cell than in the extracellular fluid, while the reverse is true for potassium ions. Obviously, the cell could not survive in such an environment. Direct link to Stocke's post Why does the diffusion of, Posted 7 years ago. 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? C. The SER manufactures proteins for export from the cell. Each of these factors, independently and collectively can alter the rate and extent of diffusion. An electrical potential difference exists whenever there is a net separation of charges in space. Which cell junctions prevent substances from passing between adjacent 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 both solutions are isotonic. Molecules that cannot easily pass through the bilayer include ions and small hydrophilic molecules, such as glucose, and macromolecules, including proteins and RNA. An example of this is the way the noxious smell of ammonia gas spreads in air. A. The difference in the concentrations of the molecules in the two areas is called the concentration gradient. The cell membrane lets certain substances enter the cell and keeps certain substances out of the cell. Diffusion is the mixing of substances due to the movement of their particles. Which of the following best describes the survey methods used to delineate agricultural land and the associated settlement patterns shown in the tw.

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