The reaction proceeds as the two reactants diffuse towards each other and undergo a chemical reaction to form esters. Everything in the cell sits in the cytosol, like fruit in a Jell-o mold. 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 these statements about diffusion of molecules is true? Therefore, they are NOT able to __________. The food coloring mixes through the hot water faster than it mixes with the cold water. Which of the following processes require the use of protein carrier molecules? In any system, molecules are moving with a certain amount of kinetic energy. 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). Active transport mechanisms do just this, expending energy (often in the form of ATP) to maintain the right concentrations of ions and molecules in living cells. This process requires some form of chemical energy. 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. What separates the intracellular fluid from the extracellular fluid? One phosphate group from ATP is attached to the pump, which is then said to be phosphorylated. Through the process of uniculturalism, multiple types of foods are blended together into one cuisine. The majority of water molecules moving across plasma membranes by osmosis do so via a process that is most similar to ____. If there was a coolant near the mouth of a crucible heating iodine how would that affect its rate of diffusion? Which of the following concepts best explains the driving forces of 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. Incorrect options: Option A is incorrect because space-time compression is the shortened time or communication between two places. 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. Be sure to clean up when you are done. Secondary active transport involves the movement of water by osmosis into a cell. Diffusion is a physical process that refers to the net movement of molecules from a region of high concentration to one of lower concentration. Which of the following best describes the differences in the agricultural practices and land use for these products? 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. movement of molecules from an area of high concentration to an area of low concentration. A. synthesize proteins 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. What process permits absorption of glucose into cells? This can occur with all sorts of matter, but is most commonly observed in liquids and gases. Active transport mechanisms can be divided into two categories. Na+. 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. An electrical potential difference exists whenever there is a net separation of charges in space. are in the same box the next time you log in. answer choices The English language initially diffused to North America through the process of relocation diffusion. In this experiment, the food coloring that gets added is the same temperature in each of the hot and cold water tests. Direct link to liweiong272's post Main difference: In facil, Posted 6 years ago. Which of the following best explains the significance of similarities between the farming practices for apple orchards and grape vineyards? The molecules move from a region of higher concentration to a region of lower concentration until the concentration becomes equal . If you forget it there is no way for StudyStack The images shown illustrate the differences in scale of production for two methods of producing thread. Diffusion - BBC Bitesize For instance, one of the ways in which polyester is synthesized is by mixing the appropriate organic acid and alcohol in their liquid form. No, because the potassium is highly concentrated in the cell, and so that's where the molecules must go(based on active transport going low concentration to high concentration). Invention of the plow eased the intensive use of labor, and the innovation of mechanized farm equipment led to improved food production. This type of transport is known as _____. 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. Diffusion is the process of movement of molecules under a concentration gradient. Which of the following best explains why farmers would plant both strawberries and watermelons in the same field? Secondary active transport involves the movement of a substance into a cell through a protein channel with its concentration gradient. Water leaves the cells and the cells shrink. Which of the following best explains the spatial patterns illustrated in von Thnens model? 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. Epinephrine is taken into the cell by endocytosis; glycogen is converted to glucose in the endocytotic vesicle. Which of the following best explains diffusion? Which of these components add specialized functions to the plasma membrane? The rate of diffusion depends on the nature of interaction between the medium and material. However, for molecules in the periphery, rapidly moving molecules in the air also influence their movement, allowing them to diffuse into the air. C. rough endoplasmic reticulum ADP is released as a by-product. Which of the following best explains the farming practice related to plantation agriculture? Limited farmland encourages intensive farming with intercropping to produce high yields. The rate of this movement depends on the energy of the . He should be given a hypotonic drip to draw fluid out of his cells. If you knew the answer, tap the green Know box. Mr. Weddington was admitted to the hospital with chronic heart failure. At equilibrium, movement of molecules does not stop. For cell transport, diffusion is the movement of small molecules across the cell membrane. Which of the following correctly explains the relationship between wheat and its early hearth of domestication? All cells have a barrier around them that separates them from the environment and from other cells. Which of the following spatial patterns is best explained by bid-rent theory? "Permeable" means that anything can cross a barrier. Solution A and solution B are separated by a semipermeable membrane. Put it in freshwater, and the freshwater will, through osmosis, enter the fish, causing its cells to swell, and the fish will die. A red blood cell will swell and undergo hemolysis (burst) when placed in a hypotonic solution. In simple diffusion, this process proceeds without the aid of a transport protein. Solved Which of the following BEST explains the difference - Chegg Requested URL: byjus.com/biology/diffusion/, User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.5060.114 Safari/537.36 Edg/103.0.1264.62. B. ribosome Which of the following best explains diffusion? How is the , Posted 7 years ago. What four steps should you take to reduce your risk for foodborne illnesses? (2017, April 27). Diffusion. 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. A) greater collision frequency and more effective collisions B) increasing the number of particles in a given volume increases collision frequency C) weakens the bonds in the reactants so that they are easier to break D) better orientation of the reactant 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. The greater the surface area, the faster the rate of diffusion. Philibert, J. 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. Which one of the following processes can explain this? Divide the following terms into component parts and give the meanings of the complete terms. At the exact same time, add 2-3 drops off food coloring into each glass. So something must protect the cell and allow it to survive in its water-based environment. C. The SER manufactures proteins for export from the cell. The reaction proceeds towards completion at a faster rate. 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. 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. Explain the components present in a phospholipid. Sheep production is an example of extensive agriculture requiring large pastures, whereas poultry production is an example of intensive agriculture often practiced indoors. But now you have two mixtures of different solute concentrations. A. In class, do you typically sit evenly spaced or all scrunched together? Palm oil, an edible vegetable oil used in processing packaged food products, is obtained from the fruit of the oil palm tree, grown only in the tropics. Which of the following best explains the diffusion of plants and Facilitated diffusion is necessary for the biochemical processes of every cell since there is communication between various subcellular organelles. Passive processes that move substances across membranes ________. Banana plants were brought to Central America from Southeast Asia to be grown closer to markets in the United States and Canada. molecules move through transport proteins that have been activated by ATP. 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. 1. Direct link to Samuel Mayer's post In an antiporter it uses , Posted 7 years ago. The second sugar solution is hypertonic to the first. What assists the movement of substances by facilitated diffusion? What is the basic difference between simple diffusion and facilitated diffusion across a cell membrane? If a person is severely dehydrated, their extracellular fluids will become hypertonic to the intracellular fluid. What transport process can create a concentration gradient for sodium across the plasma membrane? Explanation: When a substance moves from higher concentrated area to a lower concentrated area, is called as diffusion. D. mitochondria, Which of the following is a function of lysosomes? Simple diffusion can be disrupted if the diffusion distance is increased. 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. Pour all of the water down the sink, and wash out the glasses. Mastering A&P Chapters 1-3 Flashcards | Quizlet If you've accidentally put the card in the wrong box, just tap on the card to take it out of the box. Remember that there is water outside the cell, and the cytoplasm inside the cell is mostly water as well. D. The IV fluid should be hypotonic to the patient's blood. Similarly, if a canister of liquid nitrogen leaks a little, nitrogen gas that escapes would quickly diffuse into the atmosphere. Sucrose cannot pass through a red blood cell's plasma membrane, but water and urea can. An open door is completely permeable to anything that wants to enter or exit through the door. Red blood cells behave the same way (see figure below). To log in and use all the features of Khan Academy, please enable JavaScript in your browser. This process does not require energy. His feet and legs were swollen with fluid. 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. Which of the following is used to export large molecules from the cell? 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). This statement describes _____. Therefore, muscle cells have numerous: Which statement regarding the smooth endoplasmic reticulum (SER) is false? Which of the following compares this geographic relationship between these revolutions? For example, oxygen is at a higher concentration inside arteries and arterioles, when compared with the oxygen levels in actively respiring cells. Based on the different types of land use shown in the image, which of the following best explains why soil salinization is a concern in the arid landscape shown? Diffusion in the human body is necessary for the absorption of digested nutrients, gas exchange, the propagation of nerve impulses, the movement of hormones and other metabolites towards their target organ and for nearly every event in embryonic development. 266X15aX+baY+32b. Answer: Random movement of molecules is not fast enough to disperse through the larger eukaryotic cell volume, Explanation: Eukaryotic clels are much bigger than prokaryotic cells. With increase in temperature, the kinetic energy of all particles in the system increases. Typically, diffusion refers to the movement of molecules from high concentrations to lower concentrations. In an antiporter it uses the energy of the ions flowing down their concentration gradient. 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. 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? Solution A contains 1% glucose, solution B contains 5% glucose. Irrigation increases the salt content of the soil, which disrupts the growth of crops and degrades soil fertility. The pump is now back to where it was in step 1, and the cycle can begin again. Question 1 Which of the following can best explain why eukaryotic cells ", Biologydictionary.net Editors. The phospholipid tails are ________, which make the plasma membrane impermeable to water. Diffusion will continue until the concentration gradient has been eliminated. molecules move through transport proteins that have been activated by ATP. For instance, when iodine is sublimated over a hot stove, purple fumes begin to appear and mix with air. Since they are relatively large openings in the plasma membrane, these integral membrane proteins also have high specificity. In each cycle, three sodium ions exit the cell, while two potassium ions enter. fats and proteins yield too much energy for the cells to process. 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 best explains the diffusion of plants and animals from their hearths of domestication? 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 __________. This is also seen when two liquid reactants are mixed with one another. Solved QUESTION 28 Which of the following best explains the - Chegg Which of the following organelles will be abundant in liver cells? Water moves into and out of cells by osmosis. Which of the following best explains why tea plantations are common in Sri Lanka and tea exports are important to the country's economy? Image depicting the charge and ion distribution across the membrane of a typical cell. In general, to maintain homeostasis the relationship between our intracellular and extracellular fluids should be which of the following? Facilitated diffusion is diffusion that is helped along (facilitated by) a membrane transport channel. It is simply the statistical outcome of random motion. Your email address is only used to allow you to reset your password. The Green Revolution led to an increase in food production in many places around the world, but there have been some negative consequences. Increase C. Decrease D. It would depend on the nature and temperature of the coolant, 3. Each cell has a long tail that moves in a whip-like manner. Farmers' health is at risk in less developed countries, whereas environmental pollution is a risk in more developed countries. Which of the following is not a passive process? The rate of this movement depends on the energy of the molecules. The river in the long lot survey system provided better access to waterways to transport goods to market. To unpackage and unwind DNA so that enzymes can access the individual genes. So the phospholipids are arranged in a double layer (a bilayer) to keep the cell separate from its environment. Large polar molecules cannot diffuse across a biological membrane B. Imagine you're preparing a barbecue of grilled chicken and salad for friends. Which of the following is most likely to move through the cell membrane by facilitated diffusion? Posted 7 years ago. Diagram of a sodium-glucose cotransporter, which uses the energy stored in a sodium ion gradient to transport glucose "uphill" against its gradient. If you say something, I ll ask someone at what age erectile dysfunction starts to clean it up. 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. Have you ever colored a picture with marker and noticed that two touching colors begin to bleed together? The protein can be toggled back and forth between these forms by the addition or removal of a phosphate group, which is in turn controlled by the binding of the ions to be transported. What part of the plasma membrane is hydrophobic? Which of the following best describes the settlement patterns shown in the images? does the glucose molecule just randomly attach itself to the protein when it's about to transport a sodium ion to the other side? C. Secondary active transport occurs when the movement of one substance is coupled with the passive transport of a second substance. A substance moves by facilitated diffusion into a cell. It can involve either the spreading of a material through a medium or the transport of a particle across a membrane. 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. C. The IV fluid should be hypertonic to the patient's blood. serve as the site for metabolic reactions such as protein synthesis. Direct link to Yago's post Why can't the Sodium move, Posted 4 years ago. Direct link to auzennesylvester92's post Are these pumps negativel, Posted 5 years ago. Which of the following solutions contains the most solute? 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 At any given temperature, the diffusion of a smaller particle will be more rapid than that of a larger-sized molecule. In secondary active transport, the movement of the sodium ions down their gradient is coupled to the uphill transport of other substances by a shared carrier protein (a. The English language became a widely spoken language in North America in the twentieth century. Similarly, two miscible liquids will also diffuse into each other to form a uniform solution. Which statement displays the address of the variable num1? Na+ Ions move easily through water, which is polar, but cannot pass directly through the lipid (nonpolar) part of the cell membrane. This makes it easier for the dye to get mixed throughout the hot water. Simple diffusion and osmosis do not involve transport proteins. As an example, let's suppose we have a high concentration of sodium ions in the extracellular space (thanks to the hard work of the sodium-potassium pump). Would remain unchanged B. With the phosphate group gone, the pump will change back to its original form, opening towards the interior of the cell. 8.4: Osmosis and Diffusion - Chemistry LibreTexts Which of the following correctly compares the significance of the different technologies shown in the images? This is because in hot water, the water molecules have more energy and are moving faster than the molecules of cold water. C. The SER manufactures proteins for export from the cell. 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. Which of the following is NOT one of the functions of the cytoskeleton? Each of these factors, independently and collectively can alter the rate and extent of diffusion. 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. The number of molecules that only collide with other carbon dioxide particles within dry ice decreases. 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 . Her much more prepared A&P student roommate quickly realized the problem and called an ambulance. Imagine this just like a hydroelectric power station uses the energy of water flowing down the waterfall to create electricity.