which of the following best explains diffusion?

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this is in relation to the electrochemical gradient section. Cells utilize oxygen in the mitochondria for aerobic respiration, which generates carbon dioxide gas as a byproduct. The image shows the movement of an insoluble molecule from the extracellular space towards the cytoplasm. The mechanization of farm work allowed many young people to migrate and join a growing urban industrial workforce. Direct link to City Face's post Because a solute moving d, Posted 7 years ago. 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. Na+/K+ pump. Small-scale farmers in Asia often lacked the resources necessary to acquire the hybrid . The phospholipid tails are ________, which make the plasma membrane impermeable to water. Nuclear pores connect the cytoplasm with the nucleoplasm and allow substances to move between the two areas. Large polar molecules cannot diffuse across a biological membrane B. 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. Griffin, Stanley Gully. Biologydictionary.net, April 27, 2017. https://biologydictionary.net/diffusion/. 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. The images shown illustrate a change that took place as the Second Agricultural Revolution coincided with the Industrial Revolution. solute: a substance dissolved in another to form a solution. The sodium-potassium pump uses ATP to move sodium and potassium ions across the plasma membrane. So something must protect the cell and allow it to survive in its water-based environment. 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. Question 12 30 seconds Q. An example of this is the way the noxious smell of ammonia gas spreads in air. This increases the rate at which solute and solvent molecules move, and increases collisions. Which of the following best explains diffusion? 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. 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. To see how well you know the information, try the Quiz or Test activity. Similarly, the medium in which diffusion occurs could also be in one of the three physical states. To unpackage and unwind DNA so that enzymes can access the individual genes. how does the antiporter provide energy for molecules to go in the "opposite" direction? For instance, the channel protein that transports potassium ions has a much higher affinity for that ion than a very similar sodium ion, with nearly the same size and charge. 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? Domesticated animals such as cattle, horses, pigs, and chickens were introduced to the Americas by European colonizers. 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. At this point, equilibrium is reached. A red blood cell will swell and undergo hemolysis (burst) when placed in a hypotonic solution. Which of the following best explains diffusion? Which of the following best explains the potential impact of rising global temperatures on agricultural regions? All cells have a barrier around them that separates them from the environment and from other cells. Epinephrine binds to a cell-surface receptor; the activated receptor catalyzes the conversion of glycogen to glucose. The material that diffuses could be a solid, liquid or gas. Imagine this just like a hydroelectric power station uses the energy of water flowing down the waterfall to create electricity. Which of the following best explains the risks associated with pesticide applications? Prior to this, very few animals had been domesticated in the Americas. 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. 1. In chemical processes, diffusion is often the central principle driving many reactions. Simple diffusion can be disrupted if the diffusion distance is increased. C. peroxisome Increase C. Decrease D. It would depend on the nature and temperature of the coolant, 3. 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. why wouldnt cells use atp for primary active transport of glucose directly, why go through a second step? Allison Soult, Ph.D. (Department of Chemistry, University of Kentucky). Direct link to Yago's post Why can't the Sodium move, Posted 4 years ago. Passive processes that move substances across membranes ________. Direct link to Sam's post 1) The "sodium/glucose sy, Posted 7 years ago. Then tap the card to flip it. Predict what will happen to a patient's red blood cells if you give the patient an IV of pure water. 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. B. ribosome A. synthesize proteins A. By what endocytosis process do some white blood cells engulf bacteria? Type of active transport in which sodium and potassium are pumped across a membrane using ATP, Type of passive process in which water is moved through aquaporins, Type of passive process in which molecules move across the plasma membrane down a concentration gradient, Type of active process in which the cell engulfs extracellular substances by phagocytosis or pinocytosis. Which of the following best explains diffusion? Direct link to Zaeen Iqbal's post i dont quite understand t, Posted 7 years ago. 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. Muscle cells require an abundant amount of ATP to function. 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. Terms of Service. 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. Simple diffusion is relevant in chemical reactions, in many physical phenomena, and can even influence global weather patterns and geological events. Which of the following best explains the process illustrated by the image? The second sugar solution is hypertonic to the first. Because diffusion happens from high concentration to low concentration, the more molecules are moving, the more opportunities they have to mix together. 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. Direct link to auzennesylvester92's post Are these pumps negativel, Posted 5 years ago. These farmers and traders exchanged the domesticated plants between themselves. A fish that lives in salt water will have somewhat salty water inside itself. Electrochemical gradients and the membrane potential. The mixture of a solute in a solvent is called a solution. (Show the details. This is usually not directed in any particular manner, and can appear random. Remember that there is water outside the cell, and the cytoplasm inside the cell is mostly water as well. Since diffusion moves materials from an area of higher concentration to the lower, it is described as moving solutes "down the concentration gradient". Adults should handle or assist with potentially harmful materials or sharp objects. Diagram of a sodium-glucose cotransporter, which uses the energy stored in a sodium ion gradient to transport glucose "uphill" against its gradient. If a person goes to the hospital for surgery and requires IV (intravenous) fluids, which of the following should you expect? movement of molecules from an area of high concentration to an area of low concentration. Here, the cell can't import glucose for free using diffusion, because the natural tendency of the glucose will be to diffuse out rather than flowing in.Instead, the cell must bring in more glucose molecules via active transport.In active transport, unlike passive transport, the cell expends energy (for example, in the form of ATP) to move a substance against its concentration gradient. _{15}^{\mathrm{a}} \mathrm{X} & \rightarrow \beta+^{32} \mathrm{b} \end{aligned} Have you ever colored a picture with marker and noticed that two touching colors begin to bleed together? 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 results in crenation (shriveling) of the blood cell. This creates a concentration gradient, with concentration of carbon dioxide gradually decreasing with distance from the lump of dry ice. Even though this is random non-directed movement, with a large bulk, it can create a scenario where there is no net movement of gas from the container. Which of the following best explains the farming practice related to plantation agriculture? Can't that serve the same role? This property can be observed even better if the gas has an odor or color. gradient? What assists the movement of substances by facilitated diffusion? What process permits absorption of glucose into cells? Intensive agriculture is practiced in a Mediterranean climate. When red blood cells are in a hypertonic (higher concentration) solution, water flows out of the cell faster than it comes in. By osmosis: water will move from solution A to solution B. If the cell is moved to a 6% dextrose solution, then predict what will happen to the cell. Water moves into and out of cells by osmosis. Facilitated diffusion is necessary for the biochemical processes of every cell since there is communication between various subcellular organelles. 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. When the sodium ions bind, they trigger the pump to hydrolyze (break down) ATP. His feet and legs were swollen with fluid. this monosaccharide yields the most energy of all macromolecules. This process does not require energy. The cell membrane lets certain substances enter the cell and keeps certain substances out of the cell. (2017, April 27). In this conformation, the pump no longer likes to bind to sodium ions (has a low affinity for them), so the three sodium ions are released outside the cell. 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. Direct link to l's post Questions: 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? By diffusion: glucose will move from solution B to solution A. Diffusion is the movement when molecules move from higher concentrated area to lower concentrated area. Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of higher concentration to an area of lower concentration. An electrical potential difference exists whenever there is a net separation of charges in space. Which of the following solutions will cause a red blood cell to shrink? Which of the following correctly compares the significance of the different technologies shown in the images? Image 2 shows an innovation that occurred in the Second Agricultural Revolution, reducing the amount of labor needed and increasing crop yields. Water leaves the cells and the cells shrink. This allows red blood cells to carry oxygen all over your body. What conditions affect the diffusion of a substance in water? However, the same phenomenon is not seen when immiscible liquids like petrol and water are mixed together. Water molecules will move from the side of higher water concentration to the side of lower concentration until both solutions are isotonic. Primary active transport, secondary active transport, exocytosis, and endocytosis are all what type of process? Which of the following is most likely to move through the cell membrane by facilitated diffusion? Active transport mechanisms can be divided into two categories. Comparing the two images, which survey system was more efficient in terms of trade? Which of the following solutions contains the most solute? Which of the following statements is best supported by the images? C. Secondary active transport occurs when the movement of one substance is coupled with the passive transport of a second substance. The plasma membrane (see figure below) is made of a double layer of special lipids, known as phospholipids. In this experiment, you will experience how temperature affects the mixing of food coloring drops with water. Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org.

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