Diffusion - BBC Bitesize Direct link to Zaeen Iqbal's post i dont quite understand t, Posted 7 years ago. 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? Na+ Increase C. Decrease D. It would depend on the nature and temperature of the coolant, 3. Therefore, the rate of diffusion of the gas into air also increases. Solutions of equal solute concentration are isotonic. When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Which of the following explains an impact of globalized agricultural commodity chains on consumers as compared to producers? 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). C. peroxisome Which of the following correctly compares the significance of the different technologies shown in the images? Figure showing the transport cycle of the sodium-potassium pump. Examples of molecules that can easily diffuse across the plasma membrane include carbon dioxide and oxygen gas. Human Anatomy & Physiology- MyLab & Mastering AandP- Ch 03 HW 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). If a person goes to the hospital for surgery and requires IV (intravenous) fluids, which of the following should you expect? C. The SER manufactures proteins for export from the cell. answer choices The greater the difference in concentration, the quicker the rate of diffusion. concentrated salt solution. Which one of the following processe | Filo Simple diffusion is relevant in chemical reactions, in many physical phenomena, and can even influence global weather patterns and geological events. The gradient is steep enough that potassium ions will move out of the cell (via channels), despite a growing negative charge on the interior. 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 SER detoxifies drugs and harmful substances ingested by and produced in the body. Its tempting to simply make an argument based on stoichiometry: for every three ions of sodium that move out, only two ions of potassium move in, resulting in a more negative cell interior. To unpackage and unwind DNA so that enzymes can access the individual genes. Which of the following explains why oranges are available. It will bind two of them, and this triggers removal of the phosphate group attached to the pump in step 2. Which of the following is the best situation for maintaining homeostasis? A. The sodium-potassium pump uses ATP to move sodium and potassium ions across the plasma membrane. Solved Which of the following best explains the effect of - Chegg Which of the following is not required for osmosis to occur? One of the main characteristics of . Because of the increased capital investment required to produce new crop varieties using technology that was pioneered in more developed countries, there was an increase in wealth disparity in many farming communities in less developed countries. Some transport processes use transport proteins in the plasma membrane, but do not require ATP. Solved 1. Which of the following best explains how water - Chegg Which of the following best explains diffusion? Eventually, the concentration of "stuff" on either side of them will even out. A solution that contains fewer solutes than the cell is ________ to the cell. i dont quite understand the secondary active transport. Background. What is the basic difference between simple diffusion and facilitated diffusion across a cell membrane? Direct link to Ivana - Science trainee's post yes, dimensions also play. Direct link to City Face's post Because a solute moving d, Posted 7 years ago. Imagine you have a cup that has \(100 \: \text{mL}\) water, and you add \(15 \: \text{g}\) of table sugar to the water. In this form, the pump really likes to bind (has a high affinity for) sodium ions, and will take up three of them. What type of membrane junction allows ions to pass directly from the cytoplasm of one cell to the cytoplasm of the adjacent cell? D. Secondary active transport involves the movement of a substance into a cell with its concentration gradient. 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. What would happen if a cell dissolved in water, like sugar does? C. Extracellular fluid should be isotonic to intracellular fluid. tonicity: the amount of solute in a solution. In general, to maintain homeostasis the relationship between our intracellular and extracellular fluids should be which of the following? For instance, a gas diffuses very quickly in another gas. Why does the diffusion of the solute down its concentration gradient release energy? At 3M, we discover and innovate in nearly every industry to help solve problems around the world. Direct link to Yago's post Why can't the Sodium move, Posted 4 years ago. What do you predict will happen to the person's cells? In the context of the Second Agricultural Revolution, which of the following trends is represented in these images? Since they are relatively large openings in the plasma membrane, these integral membrane proteins also have high specificity. 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. Epinephrine diffuses through the plasma membrane; the hormone dimerizes in the cytosol. (2017, April 27). does the glucose molecule just randomly attach itself to the protein when it's about to transport a sodium ion to the other side? Which of the following best explains the diffusion of plants and 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. Stirring increases the area of interaction between the two chemicals and allows these molecules to diffuse towards each other more quickly. What four steps should you take to reduce your risk for foodborne illnesses? In facilitated diffusion, molecules only move with the aid of a protein in the membrane. Which of the following best explains the potential impact of rising global temperatures on agricultural regions? Imagine you're preparing a barbecue of grilled chicken and salad for friends. This allows red blood cells to carry oxygen all over your body. Which of the following is most likely to move through the cell membrane by facilitated diffusion? Midlatitude climates tend to support similar agricultural crops and practices, such as wheat farming in the United States and China. Small-scale farmers in Asia often lacked the resources necessary to acquire the hybrid . Sheep production in New Zealand and poultry production in Arkansas produce food animals for human consumption. Channels are very selective and will accept only one type of molecule (or a few closely related molecules) for transport. Limited farmland encourages intensive farming with intercropping to produce high yields. Which of the following best explains the significance of a similarity among locations where olives, figs, grapes and lemons are grown? Which of the following substances must travel across a membrane via facilitated diffusion? Which of the following best compares a technological consequence of the Green Revolution in more developed and less developed countries? This increases the rate at which solute and solvent molecules move, and increases collisions. 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. A. smooth endoplasmic reticulum C. Secondary active transport occurs when the movement of one substance is coupled with the passive transport of a second substance. Because a solute moving down its concentration gradient is spontaneous. Each cell has a long tail that moves in a whip-like manner. 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? To see how well you know the information, try the Quiz or Test activity. You now add the two solutions to a beaker that has been divided by a semipermeable membrane, with pores that are too small for the sugar molecules to pass through, but are big enough for the water molecules to pass through. 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. An electrical potential difference exists whenever there is a net separation of charges in space. & y_2^{\prime}=12 y_1 \\ This property can be observed even better if the gas has an odor or color. A. This electricity can do work. The English language became a widely spoken language in North America in the twentieth century. The use of improved plant hybrids and agricultural chemicals. Concentric rings of different agricultural activities surrounding a city in the midwestern United States. The Green Revolution led to an increase in food production in many places around the world, but there have been some negative consequences. She consumed a large amount of water in a short time (Don't try thiswater intoxication is often fatal.). Cells placed in a hypotonic solution will take in water across their membranes until both the external solution and the cytosol are isotonic. Which of the following is most likely to move through the cell membrane by facilitated diffusion? Which one of the following processes can explain this? D. Golgi apparatus. Which of the following compares this geographic relationship between these revolutions? Which of the following best explains the reasons for the similarities and differences between the two land survey systems shown? Irrigation increases the salt content of the soil, which disrupts the growth of crops and degrades soil fertility. 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. He should be given a hypotonic drip to draw fluid out of his cells. As a result of the EUs General Data Protection Regulation (GDPR). The inside of all cells also contain a jelly-like substance called cytosol. http://physrev.physiology.org/content/91/2/733, https://phys.org/news/2013-10-mechanism-sodium-potassium-revealed.html. The number of molecules that only collide with other carbon dioxide particles within dry ice decreases. \dot{Q}_{\mathrm{H}}=500 \mathrm{kW}, \dot{Q}_{\mathrm{C}}=100 \mathrm{kW}} \\ {\text { b. } Terms of Service. To log in and use all the features of Khan Academy, please enable JavaScript in your browser. 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. Cells may lyse when placed into a hypertonic environment. What part of a cell membrane is usually in contact with the interstitial fluid? C. Diffusion provides ciphertext heterogeneity, while confusion provides algorithm This problem has been solved! answer choices Through the process of ethnocentrism, American culture has spread throughout the world. In chemical processes, diffusion is often the central principle driving many reactions. Pour all of the water down the sink, and wash out the glasses. diffusion: [noun] the state of being spread out or transmitted especially by contact : the action of diffusing. how does the carrier protein "harness" energy from another molecules concentration gradient? The rate of diffusion depends on the nature of interaction between the medium and material. Otherwise, tap the red Don't know box. This occurs because there is a net movement of sugar molecules into the water medium. D. mitochondria, Which of the following is a function of lysosomes? As a simple example, a few crystals of sugar in a glass of water will slowly dissolve over time. At this balance point, the inside of the membrane is negative relative to the outside. 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. At any given temperature, the diffusion of a smaller particle will be more rapid than that of a larger-sized molecule. Farmers' health is at risk in less developed countries, whereas environmental pollution is a risk in more developed countries. 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 is usually not directed in any particular manner, and can appear random. Muscle cells require an abundant amount of ATP to function. Both farming practices require considerable labor input because the fruit is picked by hand, making it a product of intensive agriculture. A. Golgi apparatus In an antiporter it uses the energy of the ions flowing down their concentration gradient. A heavier molecule with a larger surface area will diffuse slowly, while smaller, lighter particles will diffuse more quickly. Based on this information and your understanding of osmosis and tonicity, what type of IV fluid is the doctor likely administering to try to save the life of the student suffering from water intoxication? 60 seconds. This statement describes _____. Solved QUESTION 28 Which of the following best explains the - Chegg 1. Heroes and Highlights in the History of Diffusion. Put the food coloring back where you found it. An example of this is the way the noxious smell of ammonia gas spreads in air. His feet and legs were swollen with fluid. Which of the following statements is best supported by the images? 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 Eshita's post No, because the potassium, Posted 7 years ago. Distinguish among hypotonic, hypertonic, and isotonic solutions. Facilitated diffusion is necessary for the movement of large or polar molecules across the hydrophobic lipid bilayer. This can occur with all sorts of matter, but is most commonly observed in liquids and gases. The images shown illustrate the differences in scale of production for two methods of producing thread. PS1.A: Structure and Properties of Matter, PS3.C: Relationship Between Energy and Forces. Water leaves the cells and the cells shrink. For example, oxygen is at a higher concentration inside arteries and arterioles, when compared with the oxygen levels in actively respiring cells. In less developed countries, pesticides are typically applied by hand, whereas pesticides are typically applied by tractors or aircraft in more developed countries. The sodium-potassium pump uses ATP to move sodium and potassium ions across the plasma membrane. Active transport mechanisms can be divided into two categories. Passive transport is a way that small molecules or ions move across the cell membrane without input of energy by the cell. ; Diffusion occurs in liquids and gases when their particles collide randomly and . 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. Which of the following scenarios best explains the Columbian Exchange? Can't that serve the same role? In comparing two solutions of unequal solute concentration, the solution with the higher solute concentration is hypertonic, and the solution with the lower solute concentration is hypotonic. At that concentration, the solution is isotonic to the cell. a.QH=500kW,QC=100kWb.QH=500kW,Wcycle=250kW,QC=200kWc.Wcycle=350kW,QC=150kWd.QH=500kW,QC=200kW, Find a real general solution of the following systems. Diffusion is the movement when molecules move from higher concentrated area to lower concentrated area. The cell is therefore not completely permeable. You would need to create a new account. Simple diffusion can be disrupted if the diffusion distance is increased. The hypertonic solution is one one side of the membrane and the hypotonic solution on the other. Adult should review each experiment and determine what the appropriate age is for the students participation in each activity before conducting any experiment. 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. In its inward-facing shape, the pump loses its interest in (has a low affinity for) potassium ions, so the two potassium ions will be released into the cytoplasm. If the outside environment of a cell is water-based, and the inside of the cell is also mostly water, something has to make sure the cell stays intact in this environment. Direct link to Samuel Mayer's post In an antiporter it uses , Posted 7 years ago. What conditions affect the diffusion of a substance in water? yes, dimensions also play a role in the case of transport. Which of the following best explains diffusion?Which of the following 1) The "sodium/glucose symporter", known as SGLT (sodium glucose linked transporter), receives the energy needed to perform its transport from the electrochemical gradient established by the sodium/potassium pump. Posted 7 years ago. 266X15aX+baY+32b. The term cytoplasm refers to the cytosol and all of the organelles, the specialized compartments of the cell. 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. B. ribosome Wipe up any spills that may have happened. Which of the following best explains why tea plantations are common in Sri Lanka and tea exports are important to the country's economy?