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

The gradient is steep enough that potassium ions will move out of the cell (via channels), despite a growing negative charge on the interior. It will bind two of them, and this triggers removal of the phosphate group attached to the pump in step 2. The SER synthesizes the majority of the lipid components of the plasma membrane. As a prokaryotic cell does not have a nucleus, the DNA is in the cytoplasm. The material that diffuses could be a solid, liquid or gas. Simple diffusion and osmosis do not involve transport proteins. The two images represent different agricultural land survey patterns. (Show the details. 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? Mehrer, H. and Stolwijk, N. A. Which statement displays the address of the variable num1? Which of the following processes require the use of protein carrier molecules? 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. 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? How, exactly, does the sodium-potassium pump establish a voltage across the membrane? 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. The cotransporter accomplishes this by physically coupling the transport of glucose to the movement of sodium ions down their concentration gradient. Similarly, the medium in which diffusion occurs could also be in one of the three physical states. Human Anatomy & Physiology- MyLab & Mastering AandP- Ch 03 HW These farmers and traders exchanged the domesticated plants between themselves. selectively permeable: the characteristic of a membrane that allows some substances through but not others. Also, think about where you see this happen in other places. The end result is an equal concentration, or equilibrium, of molecules on both sides of the membrane. The reaction proceeds towards completion at a faster rate. If the alveoli in our lungs fill with fluid (pulmonary edema), the distance the gases must travel increases, and their transport decreases. Direct link to Dovid Shaw's post how does the antiporter p, Posted 7 years ago. Secondary active transport involves the movement of a substance into a cell through a protein channel with its concentration gradient. Make sure to remember your password. During the Green Revolution, agricultural practices from more developed countries diffused to less developed countries in Asia and Africa. In simple diffusion, this process proceeds without the aid of a transport protein. This barrier is called the plasma membrane, or cell membrane. This results in crenation (shriveling) of the blood cell. serve as the site for metabolic reactions such as protein synthesis. Explain the components present in a phospholipid. This can occur with all sorts of matter, but is most commonly observed in liquids and gases. 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 concepts best explains the driving forces of A. Which of the following best explains the economic advantage of the type of farm-produced goods 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. 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). Because of the difference in sodium concentration (between the inside and outside of the cell) and due to the electrical potential difference (between the inside and outside of the cell), the SGLT is able to perform its function. 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. Why can't the Sodium move down it's concentration gradient by using the same channel the Potassium uses? Conversely, in active transport, the solute moves against the concentration gradient, from regions of lower to higher concentration. The membrane connections that prevent the leaking of fluid between cells are called ________. 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. molecules move through transport proteins that have been activated by ATP. A heavier molecule with a larger surface area will diffuse slowly, while smaller, lighter particles will diffuse more quickly. Passive processes that move substances across membranes ________. O To edit the mRNA strand and make it ready to leave the nucleus. why wouldnt cells use atp for primary active transport of glucose directly, why go through a second step? Which of the following best describes advances in the production of textiles during the Second Agricultural Revolution and the Industrial Revolution? Direct link to Sam's post 1) The "sodium/glucose sy, Posted 7 years ago. 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. Which of the following best explains the potential impact of rising global temperatures on agricultural regions? What type of cellular extension have you observed? Typically, diffusion refers to the movement of molecules from high concentrations to lower concentrations. 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 is least likely to increase the rate of diffusion? The images shown illustrate the differences in scale of production for two methods of producing thread. For instance, one of the ways in which polyester is synthesized is by mixing the appropriate organic acid and alcohol in their liquid form. Why Do Giant Pandas Have Low Libido? By the time blood flows into capillaries in the muscle or liver, for instance, there is only a single layer of cells separating this oxygen from hepatocytes or skeletal muscle fibers. The function of the plasma membrane is to control what goes in and out of the cell. 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. The rate of diffusion depends on the nature of interaction between the medium and material. To see how well you know the information, try the Quiz or Test activity. Great question since proteins are very large and complex they almost always have regions with different characteristics including patches that have negative or positive charges. 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. At 3M, we discover and innovate in nearly every industry to help solve problems around the world. 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). These molecules diffuse freely in and out of the cell, along their concentration gradient. Which of the following best explains a negative economic consequence of the Green Revolution in less developed countries as compared to more developed countries? this is in relation to the electrochemical gradient section. Overall, there are more positive charges on the outside of the membrane than on the inside. Agricultural settlement patterns are partly determined by the survey system used to organize landownership. Because a solute moving down its concentration gradient is spontaneous. That is because the molecules from the food odor havent diffused into that space yet. Terms of Service. Which of the following is not required for osmosis to occur? Which of the following best explains the process illustrated by the image? answer choices Through the process of ethnocentrism, American culture has spread throughout the world. For cell transport, diffusion is the movement of small molecules across the cell membrane. D. mitochondria, Which of the following is a function of lysosomes? Remember that there is water outside the cell, and the cytoplasm inside the cell is mostly water as well. Domesticated animals such as cattle, horses, pigs, and chickens were introduced to the Americas by European colonizers. Facilitated diffusion is necessary for the biochemical processes of every cell since there is communication between various subcellular organelles. Water moves into and out of cells by osmosis. Direct link to priciaauy's post why wouldnt cells use atp, Posted 4 years ago. When these molecules collide with one another, there is a change in the direction of movement as well as changes to momentum and velocity. In general, to maintain homeostasis the relationship between our intracellular and extracellular fluids should be which of the following? The membrane has pores and openings to allow the passage of specific molecules. 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. For instance, when iodine is sublimated over a hot stove, purple fumes begin to appear and mix with air. Which of the following compares this geographic relationship between these revolutions? Privacy Policy and 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). In this experiment, the food coloring that gets added is the same temperature in each of the hot and cold water tests. Diffusion through a membrane | Cell Structure Quiz - Quizizz What four steps should you take to reduce your risk for foodborne illnesses? A. Golgi apparatus Which of the following best compares a technological consequence of the Green Revolution in more developed and less developed countries? The high energy hot water model diffusion is important because its how we get oxygen to all the cells in our bodies. Which of these statements is NOT true? Biology Dictionary. An open beaker of water in equilibrium with water vapour is in a sealed container. Which of the following solutions contains the most solute? ADP is released as a by-product. 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. His feet and legs were swollen with fluid. With the phosphate group gone, the pump will change back to its original form, opening towards the interior of the cell. Which of the following best explains diffusion? QUESTION 28 Which of the following best explains the role of transcription in a cell? 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. 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). Spaeth, E. E., and Friedlander, S.K. This creates a concentration gradient, with concentration of carbon dioxide gradually decreasing with distance from the lump of dry ice. By diffusion: glucose will move from solution B to solution A. A cell is isotonic to the surrounding 4% dextrose solution. Retrieved from https://biologydictionary.net/diffusion/. Posted 7 years ago. The two images show different agricultural methods. What do you predict will happen to the person's cells? As a result of the EUs General Data Protection Regulation (GDPR). The English language became a widely spoken language in North America in the twentieth century. Sheep production is an example of extensive agriculture requiring large pastures, whereas poultry production is an example of intensive agriculture often practiced indoors. The cell membrane allows the cell to stay structurally intact in its water-based environment. how does the carrier protein "harness" energy from another molecules concentration gradient? For example, while oxygen gas will diffuse slightly more quickly than carbon dioxide, both of them will move more quickly than iodine gas. Farmers' health is at risk in less developed countries, whereas environmental pollution is a risk in more developed countries. Animal Gas Exchange and Transport | Organismal Biology - gatech.edu Similarly, if a canister of liquid nitrogen leaks a little, nitrogen gas that escapes would quickly diffuse into the atmosphere. (2005). Several large cities on the East Coast provide a growing market and shorter distances for transporting market gardening products. Distinguish among hypotonic, hypertonic, and isotonic solutions. How To Prolong Ejaculation During Intercourse? Direct link to Stocke's post Why does the diffusion of, Posted 7 years ago. Facilitated diffusion is diffusion that is helped along (facilitated by) a membrane transport channel. Just like the first cup, the sugar is the solute, and the water is the solvent. It can involve either the spreading of a material through a medium or the transport of a particle across a membrane. What organelle degrades old, worn-out organelles and cell components? It is simply the statistical outcome of random motion. Pour all of the water down the sink, and wash out the glasses. 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? Learn more about how this experiment is based in NGSS Disciplinary Core Ideas. Wheat was first domesticated in Mesopotamia because of a favorable climate and a great diversity of wild grains that led to crossbreeding of seeds. In the context of the Second Agricultural Revolution, which of the following trends is represented in these images? B. Which of the following best explains diffusion? D. Golgi apparatus. The second sugar solution is hypertonic to the first. Secondary active transport uses the energy stored in these gradients to move other substances against their own gradients. solute: a substance dissolved in another to form a solution. 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. Direct link to zykeriaprice2's post what is the main differen, Posted 7 years ago. B. At this balance point, the inside of the membrane is negative relative to the outside. Direct link to Yago's post Why can't the Sodium move, Posted 4 years ago. Since diffusion moves materials from an area of higher concentration to the lower, it is described as moving solutes "down the concentration gradient". This statement describes _____. 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? Biologydictionary.net, April 27, 2017. https://biologydictionary.net/diffusion/. If you're seeing this message, it means we're having trouble loading external resources on our website. 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? The mixture of a solute in a solvent is called a solution. Predict behavior of blood cells in different solution types. For best results enter two or more search terms. C. The IV fluid should be hypertonic to the patient's blood. The plasma membrane (see figure below) is made of a double layer of special lipids, known as phospholipids. If the cell is moved to a 6% dextrose solution, then predict what will happen to the cell. At equilibrium, movement of molecules does not stop. This makes it easier for the dye to get mixed throughout the hot water. 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. 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. The three main kinds of passive transport are diffusion (or simple diffusion), osmosis, and facilitated diffusion. 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. Large polar molecules cannot diffuse across a biological membrane B. What assists the movement of substances by facilitated diffusion? The electrochemical gradients set up by primary active transport store energy, which can be released as the ions move back down their gradients. On the other extreme, a red blood cell that is hypotonic (lower concentration outside the cell) will result in more water flowing into the cell than out. Microtubules are composed of protein subunits known as: Through the microscope, you see cells swimming. C. Diffusion provides ciphertext heterogeneity, while confusion provides algorithm This problem has been solved! B. ribosome Channels are very selective and will accept only one type of molecule (or a few closely related molecules) for transport. The conversion from manual thread spinning to an industrial processing approach led to increased demand for raw cotton in the agricultural sector. An electrical potential difference exists whenever there is a net separation of charges in space. When red blood cells are in a hypertonic (higher concentration) solution, water flows out of the cell faster than it comes in. 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