which of the following best explains diffusion? which of the following best explains diffusion?

Be sure to clean up when you are done. Stirring increases the area of interaction between the two chemicals and allows these molecules to diffuse towards each other more quickly. In this experiment, the food coloring that gets added is the same temperature in each of the hot and cold water tests. Which of the following best explains the diffusion of plants and Which of the following correctly explains the relationship between wheat and its early hearth of domestication? Simple diffusion and osmosis do not involve transport proteins. Instead of feeling drunk, she felt nauseated, developed a severe headache, began to get confused, and then became unconscious. How is the , Posted 7 years ago. In other words, plasma . Similarly, if a canister of liquid nitrogen leaks a little, nitrogen gas that escapes would quickly diffuse into the atmosphere. Drought and depletion of groundwater sources in developing countries cause a rise in global grain prices and associated higher costs for food. A typical grocery store in the United States may sell oranges grown primarily in California during part of the year and oranges grown primarily in South Africa during a different part of the year. Which of the following best describes the survey methods used to delineate agricultural land and the associated settlement patterns shown in the tw. The material that diffuses could be a solid, liquid or gas. Learn more about how this experiment is based in NGSS Disciplinary Core Ideas. 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. A solution that contains fewer solutes than the cell is ________ to the cell. A cell is isotonic to the surrounding 4% dextrose solution. Which of the following spatial patterns is best explained by bid-rent theory? 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. Diffusion happens slowly and only across the small surface of interaction between the two fluids. What conditions affect the diffusion of a substance in water? Similarly, the medium in which diffusion occurs could also be in one of the three physical states. A. 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. 2.1: Osmosis - Biology LibreTexts 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. Passive transport is a way that small molecules or ions move across the cell membrane without input of energy by the cell. 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. Spaeth, E. E., and Friedlander, S.K. why wouldnt cells use atp for primary active transport of glucose directly, why go through a second step? B. Which of the following explains the prevalence of banana plantations in Central America? Therefore, muscle cells have numerous: Which statement regarding the smooth endoplasmic reticulum (SER) is false? The passive process that involves the movement of water through aquaporins is ________. This example also shows that the diffusion of any one material is independent of the diffusion of any other substances. Which of the following best explains the process illustrated by the image? 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. 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. A. Golgi apparatus Direct link to Dovid Shaw's post how does the antiporter p, Posted 7 years ago. Put the food coloring back where you found it. Carbon dioxide would diffuse faster than bromine gas C. Integral membrane proteins that facilitate diffusion are highly specific about their cargo D. All of the above, Biologydictionary.net Editors. & y_2^{\prime}=12 y_1 \\ Which statement displays the address of the variable num1? The two images represent different agricultural land survey patterns. concentrated salt solution. Which one of the following processe | Filo 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. This barrier is called the plasma membrane, or cell membrane. Which of the following statements is best supported by the images? Terms of Service. serve as the site for metabolic reactions such as protein synthesis. However, for molecules in the periphery, rapidly moving molecules in the air also influence their movement, allowing them to diffuse into the air. O To edit the mRNA strand and make it ready to leave the nucleus. diffusion: [noun] the state of being spread out or transmitted especially by contact : the action of diffusing. Which of the following best explains diffusion?Which of the following Small-scale farmers in Asia often lacked the resources necessary to acquire the hybrid . 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 Facilitated diffusion is diffusion that is helped along (facilitated by) a membrane transport channel. LEFT ARROW - move card to the Don't know pile. However, the same phenomenon is not seen when immiscible liquids like petrol and water are mixed together. The cotransporter accomplishes this by physically coupling the transport of glucose to the movement of sodium ions down their concentration gradient. 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? If sublimation is carried out in a narrow crucible, the fumes diffuse slowly out towards the mouth of the container and then rapidly disappear. What do you predict will happen to the person's cells? Water molecules will move from the side of higher water concentration to the side of lower concentration until both solutions are isotonic. Passive transport and active transport across a cell membrane article If you're seeing this message, it means we're having trouble loading external resources on our website. Similarly, two miscible liquids will also diffuse into each other to form a uniform solution. It is the random motion of the molecules that causes them to move from an area of high concentration to an area with a lower concentration. Predict what will happen to a patient's red blood cells if you give the patient an IV of pure water. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out. Which of the following scenarios best explains the Columbian Exchange? B. Microtubules are composed of protein subunits known as: Through the microscope, you see cells swimming. Because it is faster to utilize already available ATP through the electrochemical gradient. Imagine you have a cup that has \(100 \: \text{mL}\) water, and you add \(15 \: \text{g}\) of table sugar to the water. 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. gradient? 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. Na+ Ions move easily through water, which is polar, but cannot pass directly through the lipid (nonpolar) part of the cell membrane. Can you predict, based on the first way of doing the experiment, what might change, if anything? Which of the following best explains the significance of similarities between the farming practices for apple orchards and grape vineyards? The Green Revolution led to an increase in food production in many places around the world, but there have been some negative consequences. A vesicle fuses with the plasma membrane and releases its contents to the extracellular fluid. A red blood cell will swell and undergo hemolysis (burst) when placed in a hypotonic solution. To log in and use all the features of Khan Academy, please enable JavaScript in your browser. Which of the following is the main component of the cell membrane? It can involve either the spreading of a material through a medium or the transport of a particle across a membrane. Molecules that cannot easily pass through the bilayer include ions and small hydrophilic molecules, such as glucose, and macromolecules, including proteins and RNA. Fish cells, like all cells, have semipermeable membranes. This process continues until the voltage across the membrane is large enough to counterbalance potassiums concentration gradient. This type of transport is known as _____. Between 1950 and 1990, wheat production in India in average pounds per acre more than tripled, which allowed India to meet its populations need for food. Which of these statements is NOT true? Compared to plain milk or fresh fruit, these value-added agricultural goods significantly increase the price of the farm products sold and increase earnings for farmers. A number of colonies were established and settled by people from Great Britain. A heavier molecule with a larger surface area will diffuse slowly, while smaller, lighter particles will diffuse more quickly. thank you. Plantation farming is considered to be an intensive farming practice because it requires large inputs of labor and capital to produce the crop. Diffusion will continue until the concentration gradient has been eliminated. Passive processes that move substances across membranes ________. Heroes and Highlights in the History of Diffusion. This way, the capillaries remain at a low carbon dioxide concentration, allowing the constant movement of the molecule away from cells. The rate of diffusion depends on the nature of interaction between the medium and material. In most biological systems, diffusion occurs across a semi-permeable membrane made of a lipid bilayer. Prior to this, very few animals had been domesticated in the Americas. Which of the following substances must travel across a membrane via facilitated diffusion? At equilibrium, movement of molecules does not stop. Which of the following is NOT one of the functions of the cytoskeleton? Diffusion is a physical process that refers to the net movement of molecules from a region of high concentration to one of lower concentration. The conversion from manual thread spinning to an industrial processing approach led to increased demand for raw cotton in the agricultural sector. Remember that there is water outside the cell, and the cytoplasm inside the cell is mostly water as well. Which of the following best explains the potential impact of rising global temperatures on agricultural regions? The majority of water molecules moving across plasma membranes by osmosis do so via a process that is most similar to ____. Typically, diffusion refers to the movement of molecules from high concentrations to lower concentrations. 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? Allison Soult, Ph.D. (Department of Chemistry, University of Kentucky). Diffusion Definition & Meaning - Merriam-Webster Epinephrine is taken into the cell by endocytosis; glycogen is converted to glucose in the endocytotic vesicle. Think of how delicious smells from your kitchen take longer to get into your bedroom than to your living room which is located right beside the kitchen. 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. For cell transport, diffusion is the movement of small molecules across the cell membrane. Direct link to tyersome's post Great question since pr, Posted 7 years ago. In any system, molecules are moving with a certain amount of kinetic energy. The pump is now back to where it was in step 1, and the cycle can begin again. To see how well you know the information, try the Quiz or Test activity. The electrochemical gradients set up by primary active transport store energy, which can be released as the ions move back down their gradients. 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. Simple diffusion is merely the movement of molecules along their concentration gradient without the direct involvement of any other molecules. When you've placed seven or more cards in the Don't know box, tap "retry" to try those cards again. As a simple example, a few crystals of sugar in a glass of water will slowly dissolve over time. If the ECF is more concentrated than the cytosol, then the ECF is: A primary active transport process is one in which __________. Direct link to Srichchha Pradhan's post There are certainly more , Posted 6 years ago. Cytosol is composed of water and other molecules, including enzymes, which are proteins that speed up the cell's chemical reactions. 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. Facilitated diffusion requires the assistance of proteins. The mechanization of farming in the Second Agricultural Revolution resulted in more reliable crop harvests and healthier populations in areas where the mechanization was adopted. Can't that serve the same role? Which of the following solutions will cause a red blood cell to shrink? How, exactly, does the sodium-potassium pump establish a voltage across the membrane? If a cell is in a hypertonic solution, the solution has a . For best results enter two or more search terms. The food coloring mixes through the hot water faster than it mixes with the cold water. Even in large industrial reactions, when two liquids are mixed together, diffusion brings the reactants together and allows the reaction to proceed smoothly. The membrane potential of a typical cell is -40 to -80 millivolts, with the minus sign meaning that inside of the cell is more negative than the outside, As an example of how the membrane potential can affect ion movement, lets look at sodium and potassium ions. What is the basic difference between simple diffusion and facilitated diffusion across a cell membrane? A&P lecture 1 chp 3 Flashcards | Chegg.com One and a Half Century of Diffusion: Fick, Einstein, before and beyond. The SER detoxifies drugs and harmful substances ingested by and produced in the body. Incorrect options: Option A is incorrect because space-time compression is the shortened time or communication between two places. The Diffusion of Oxygen, Carbon Dioxide, and Inert Gas in Flowing Blood. While science experiments at home are exciting ways to learn about science hands-on, please note that some may require participants to take extra safety precautions and/or make a mess. Direct link to Yago's post Why can't the Sodium move, Posted 4 years ago. If there was a coolant near the mouth of a crucible heating iodine how would that affect its rate of diffusion? The IV fluid should be isotonic to the patient's blood. The kinetic energy of the molecules results in random motion, causing diffusion. The number of molecules that only collide with other carbon dioxide particles within dry ice decreases. The greater the surface area, the faster the rate of diffusion. molecules move through transport proteins that have been activated by ATP. What four steps should you take to reduce your risk for foodborne illnesses? Osmosis | Biology Quiz - Quizizz In general, to maintain homeostasis the relationship between our intracellular and extracellular fluids should be which of the following? Water moves into and out of cells by osmosis. movement of molecules from an area of high concentration to an area of low concentration. Which of the following best explains diffusion? What Is Diffusion? - Definition, Types & Examples Of Diffusion - BYJUS Facilitated diffusion is necessary for the movement of large or polar molecules across the hydrophobic lipid bilayer. QUESTION 28 Which of the following best explains the role of transcription in a cell? This makes it easier for the dye to get mixed throughout the hot water. 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. Which of the following is not a passive process? Direct link to Samuel Mayer's post In an antiporter it uses , Posted 7 years ago. Which Of The Following Best Explains Diffusion Quizlet? When the roommate told the Emergency Department doctor what had happened, the doctor quickly began administering IV (intravenous) fluids. During the Green Revolution, agricultural practices from more developed countries diffused to less developed countries in Asia and Africa. Passive Transport | Biology I - Lumen Learning Active transport works by using a phosphate group from ATP to change the shape of the protein and thus do work. Which of the following best explains the spatial patterns illustrated in von Thnens model? The sodium-potassium pump uses ATP to move sodium and potassium ions across the plasma membrane. When oxygen is moving towards tissues from capillaries, carbon dioxide is entering the bloodstream. Both domesticated plants and animals spread across the globe through contagious diffusion in early years by farmers and traders, and later by relocation diffusion through European exploration and colonialism. What is transported across a membrane during osmosis? 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. Wheat was first domesticated in Mesopotamia because of a favorable climate and a great diversity of wild grains that led to crossbreeding of seeds. 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. Diffusion occurs when the spontaneous net movement of particles or molecules spreads them from an area of high concentration to an area of low concentration through a semipermeable membrane. The three main kinds of passive transport are diffusion (or simple diffusion), osmosis, and facilitated diffusion. Diffusion is a physical process that refers to the net movement of molecules from a region of high concentration to one of lower concentration.