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

AP human test | Geography Quiz - Quizizz The rate of diffusion of a gas across a surface is controlled by the following: k, the gas diffusion constant; A, the area for gas exchange; P2-P1, the difference in partial pressure of gas on either side of diffusion barrier; D, the distance across which the gas must diffuse (thickness of diffusion barrier) This statement describes _____. Animal cells tend to do best in an isotonic environment, where the flow of water in and out of the cell is occurring at equal rates. The high energy hot water model diffusion is important because its how we get oxygen to all the cells in our bodies. What is transported across a membrane during osmosis? A cell is isotonic to the surrounding 4% dextrose solution. Predict behavior of blood cells in different solution types. 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. 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. Spontaneous activity releases energy, non-spontaneous activity (like moving something against its concentration gradient) requires energy. serve as the site for metabolic reactions such as protein synthesis. What values of a and b would complete each of the following (X and Y are not meant to be any particular elements): 266X+baY15aX+32b\begin{aligned} 266 \mathrm{X} & \rightarrow \alpha+\mathrm{b}^{\mathrm{a}} \mathrm{Y} \\ In less developed countries, pesticides are typically applied by hand, whereas pesticides are typically applied by tractors or aircraft in more developed countries. What part of the plasma membrane is hydrophobic? Although one of these refers to chemical properties and the latter social interaction, both are examples or diffusion. Can you predict, based on the first way of doing the experiment, what might change, if anything? Which of the following solutions contains the most solute? Biology Dictionary. Just like the first cup, the sugar is the solute, and the water is the solvent. For instance, in the example about the diffusion of iodine gas, if the crucible is placed in another closed container and iodine crystals are heated for an extended period of time, the rate at which the purple gas seems to disappear at the mouth of the crucible will reduce. ), y1=3y2y2=12y1\begin{aligned} This is related to both the mass of the molecule and its surface area. It can involve either the spreading of a material through a medium or the transport of a particle across a membrane. Diffusion is the movement of a substance from an area of high concentration to an area of lower concentration. _{15}^{\mathrm{a}} \mathrm{X} & \rightarrow \beta+^{32} \mathrm{b} \end{aligned} Passive Transport | Biology I - Lumen Learning This process continues until the voltage across the membrane is large enough to counterbalance potassiums concentration gradient. Your cells have a plasma membrane that helps to guard your cells from unwanted intruders. Which of the following best explains diffusion?Which of the following A Diffusion provides encryption strength, while confusion provides data integrity B. Diffusion provides function integrity, while confusion provides encryption confidentiality. These molecules diffuse freely in and out of the cell, along their concentration gradient. B. Biologydictionary.net, April 27, 2017. https://biologydictionary.net/diffusion/. 8.4: Osmosis and Diffusion - Chemistry LibreTexts Secondary active transport uses the energy stored in these gradients to move other substances against their own gradients. 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. Invention of the plow eased the intensive use of labor, and the innovation of mechanized farm equipment led to improved food production. For cell transport, diffusion is the movement of small molecules across the cell membrane. In general, to maintain homeostasis the relationship between our intracellular and extracellular fluids should be which of the following? Facilitated diffusion is necessary for the movement of large or polar molecules across the hydrophobic lipid bilayer. Osmosis | Biology Quiz - Quizizz 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. D. The SER stores calcium ions. However, for molecules in the periphery, rapidly moving molecules in the air also influence their movement, allowing them to diffuse into the air. This is because in hot water, the water molecules have more energy and are moving faster than the molecules of cold water. 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. 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. No tracking or performance measurement cookies were served with this page. 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). answer choices The English language initially diffused to North America through the process of relocation diffusion. Instead of feeling drunk, she felt nauseated, developed a severe headache, began to get confused, and then became unconscious. Question 56. Water moves into and out of cells by osmosis. Midlatitude climates tend to support similar agricultural crops and practices, such as wheat farming in the United States and China. Phosphorylation makes the pump change shape, re-orienting itself so it opens towards the extracellular space. If the ECF is more concentrated than the cytosol, then the ECF is: A primary active transport process is one in which __________. Facilitated diffusion is necessary for the biochemical processes of every cell since there is communication between various subcellular organelles. Which of the following best describes the survey system used in both locations shown? The gradient is steep enough that potassium ions will move out of the cell (via channels), despite a growing negative charge on the interior. Look at the large card and try to recall what is on the other side. Which of the following best explains the Green Revolution's highly variable level of success in increasing agricultu. Simple diffusion is relevant in chemical reactions, in many physical phenomena, and can even influence global weather patterns and geological events. Legal. Similarly, the medium in which diffusion occurs could also be in one of the three physical states. The plants and animals diffused to a region with climate and geography similar to that of their point of domestication. Carbon dioxide is a small molecule that moves through the phospholipid bilayer with its concentration gradient by: Sodium ions are moving with their concentration gradient with the use of a protein channel across a plasma membrane. Direct link to Dovid Shaw's post how does the antiporter p, Posted 7 years ago. Then tap the card to flip it. One of the main characteristics of . Which of the following best explains diffusion? On the other hand, facilitated diffusion, as the term indicates, requires the presence of another molecule (the facilitator) in order for diffusion to occur. In simple diffusion, this process proceeds without the aid of a transport protein. If a person goes to the hospital for surgery and requires IV (intravenous) fluids, which of the following should you expect? The township-and-range survey system was based on a geometric grid pattern, while the long-lot system was a rectilinear pattern based upon waterways or roads. What is the basic difference between simple diffusion and facilitated diffusion across a cell membrane? If a cell is in a hypertonic solution, the solution has a . A heavier molecule with a larger surface area will diffuse slowly, while smaller, lighter particles will diffuse more quickly. If a person is severely dehydrated, their extracellular fluids will become hypertonic to the intracellular fluid. Solution A contains 1% glucose, solution B contains 5% glucose. If sublimation is carried out in a narrow crucible, the fumes diffuse slowly out towards the mouth of the container and then rapidly disappear. This occurs because there is a net movement of sugar molecules into the water medium. Drought and depletion of groundwater sources in developing countries cause a rise in global grain prices and associated higher costs for food. In general, to maintain homeostasis the relationship between our intracellular and extracellular fluids should be which of the following? Sheep production is an example of extensive agriculture requiring large pastures, whereas poultry production is an example of intensive agriculture often practiced indoors. "Diffusion." Water molecules will move from the side of higher water concentration to the side of lower concentration until both solutions are isotonic. That is because the molecules from the food odor havent diffused into that space yet. This can occur with all sorts of matter, but is most commonly observed in liquids and gases. To unpackage and unwind DNA so that enzymes can access the individual genes. In facilitated diffusion, molecules only move with the aid of a protein in the membrane. Use these flashcards to help memorize information. 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. A&P lecture 1 chp 3 Flashcards | Chegg.com What is required for its transport? how does the carrier protein "harness" energy from another molecules concentration gradient? At equilibrium, movement of molecules does not stop. Figure showing the transport cycle of the sodium-potassium pump. Na+. Red blood cells behave the same way (see figure below). Direct link to liweiong272's post Main difference: In facil, Posted 6 years ago. A red blood cell will swell and undergo hemolysis (burst) when placed in a hypotonic solution. 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. Anatomy and Physiology Chapter 14 & 15 Hw/Qui, Subject pronouns and at verb's conjugation ch, Mastering A&P Chapter 3 - Cells: The Living U, David N. Shier, Jackie L. Butler, Ricki Lewis, Organizational Behavior: Managing People and Organizations, Jean Phillips, Ricky W. 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(2017, April 27). Direct link to Stocke's post Why does the diffusion of, Posted 7 years ago. 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. In the South Asian country of Sri Lanka, tea is farmed as a monoculture. what is the main difference between active transport using a carrier protein, and passive transport using facilitated diffusion? 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. C. detoxify certain chemicals D. through oxidation reactions Question 16 30 seconds Q. Cytosol is composed of water and other molecules, including enzymes, which are proteins that speed up the cell's chemical reactions. In this experiment, the food coloring that gets added is the same temperature in each of the hot and cold water tests. Facilitated diffusion requires the assistance of proteins. When these molecules collide with one another, there is a change in the direction of movement as well as changes to momentum and velocity. The membrane connections that prevent the leaking of fluid between cells are called ________. Which of the following is NOT one of the functions of the cytoskeleton? What is required for filtration to occur? Why can't the Sodium move down it's concentration gradient by using the same channel the Potassium uses? Imagine this just like a hydroelectric power station uses the energy of water flowing down the waterfall to create electricity. What transport process can create a concentration gradient for sodium across the plasma membrane? These channels are . Which of the following statements is best supported by the images? Which of the following is most likely to move through the cell membrane by facilitated diffusion? What would happen if a cell dissolved in water, like sugar does? Determine the type of membrane transport used to transport these sodium ions. For example, while oxygen gas will diffuse slightly more quickly than carbon dioxide, both of them will move more quickly than iodine gas. shouldn't it be positively charged? Here, the cell can't import glucose for free using diffusion, because the natural tendency of the glucose will be to diffuse. The images show devices developed during the Second Agricultural Revolution. why wouldnt cells use atp for primary active transport of glucose directly, why go through a second step? 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.