which of the following best explains diffusion?

Cells utilize oxygen in the mitochondria for aerobic respiration, which generates carbon dioxide gas as a byproduct. Which of the following best explains diffusion? answer choices The English language initially diffused to North America through the process of relocation 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. Each cell has a long tail that moves in a whip-like manner. Secondary active transport involves the movement of water by osmosis into a cell. Which one of the following processes can explain this? Philibert, J. Incorrect options: Option A is incorrect because space-time compression is the shortened time or communication between two places. Which cell junctions prevent substances from passing between adjacent cells? Also, it is spatially more available than in the case of ATP. To log in and use all the features of Khan Academy, please enable JavaScript in your browser. Primary active transport, secondary active transport, exocytosis, and endocytosis are all what type of process? Solved Which of the following best explains the effect of - Chegg molecules move through transport proteins that have been activated by ATP. At that concentration, the solution is isotonic to the cell. The difference in the concentrations of the molecules in the two areas is called the concentration gradient. Passive processes that move substances across membranes ________. 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? Diffusion is the process of movement of molecules under a concentration gradient. Diffusion is the movement of molecules from an area of high concentration of the molecules to an area with a lower concentration. 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. One of the main characteristics of . start superscript, 2, comma, 3, end superscript, start superscript, 4, comma, 5, end superscript. Direct link to Dovid Shaw's post how does the antiporter p, Posted 7 years ago. Make sure to remember your password. The English language became a widely spoken language in North America in the twentieth century. All the ways scientists do investigations. In facilitated diffusion, molecules only move with the aid of a protein in the membrane. At equilibrium, movement of molecules does not stop. yes, dimensions also play a role in the case of transport. 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. What happens when body cells are placed in a hypertonic solution? molecules move through transport proteins that have been activated by ATP. Which of these components add specialized functions to the plasma membrane? Direct link to City Face's post Because a solute moving d, Posted 7 years ago. The Green Revolution led to an increase in food production in many places around the world, but there have been some negative consequences. The use of improved plant hybrids and agricultural chemicals. In an isotonic solution, the flow of water in and out of the cell is happening at the same rate. 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} \\ The food coloring mixes through the hot water faster than it mixes with the cold water. A vesicle fuses with the plasma membrane and releases its contents to the extracellular fluid. Predict what will happen to a patient's red blood cells if you give the patient an IV of pure water. The image shows the movement of an insoluble molecule from the extracellular space towards the cytoplasm. 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. In less developed countries, pesticides are typically applied by hand, whereas pesticides are typically applied by tractors or aircraft in more developed countries. Sucrose cannot pass through a red blood cell's plasma membrane, but water and urea can. 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). 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). Pour all of the water down the sink, and wash out the glasses. D. The SER stores calcium ions. The IV fluid should be isotonic to the patient's blood. Unit 3 Culture Test | Geography Quiz - Quizizz As a result of the EUs General Data Protection Regulation (GDPR). y1=3y2y2=12y1. C. Secondary active transport occurs when the movement of one substance is coupled with the passive transport of a second substance. While this charge ratio does make the cells interior slightly more negative, it actually accounts for only a, Instead, the sodium-potassium pump acts primarily by building up a high concentration of potassium ions inside the cell, which makes potassiums concentration gradient very steep. The cotransporter accomplishes this by physically coupling the transport of glucose to the movement of sodium ions down their concentration gradient. Which of the following best describes the differences in the agricultural practices and land use for these products? 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. D. The IV fluid should be hypotonic to the patient's blood. For example, if a block of dry ice (carbon dioxide in solid form) is placed inside a box, carbon dioxide molecules in the center of the block mostly collide with each other and get retained within the solid mass. 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. Which of the following explains why oranges are available. Similarly, the medium in which diffusion occurs could also be in one of the three physical states. This allows red blood cells to carry oxygen all over your body. This can occur with all sorts of matter, but is most commonly observed in liquids and gases. The rate of this movement depends on the energy of the . Actually, Sodium does go down its gradient but through specialized Sodium channels. Lipids do not mix with water (recall that oil is a lipid), so the phospholipid bilayer of the cell membrane acts as a barrier, keeping water out of the cell, and keeping the cytoplasm inside the cell. A. The reaction proceeds towards completion at a faster rate. Cytosol is composed of water and other molecules, including enzymes, which are proteins that speed up the cell's chemical reactions. C. movement of molecules from an area of high concentration to an area of low concentration. Remember that there is water outside the cell, and the cytoplasm inside the cell is mostly water as well. Which of the following is not a passive process? Explain the components present in a phospholipid. Feedlots can minimize costs associated with livestock production because feedlots do not use as much space as cattle ranching. Direct link to Eshita's post No, because the potassium, Posted 7 years ago. The higher the temperature, the more kinetic energy the particles will have, so they will move and mix more quickly. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out. Which of the following solutions contains the most solute? Distinguish among hypotonic, hypertonic, and isotonic solutions. Water moves into and out of cells by osmosis. The first sugar solution is hypotonic to the second solution. Diffusion - Definition, Examples and Types | Biology Dictionary The function of the plasma membrane is to control what goes in and out of the cell. \dot{Q}_{\mathrm{H}}=500 \mathrm{kW}, \dot{Q}_{\mathrm{C}}=100 \mathrm{kW}} \\ {\text { b. } Which of the following correctly explains the relationship between wheat and its early hearth of domestication? Which of the following is the best situation for maintaining homeostasis? Carbon dioxide would diffuse faster than bromine gas C. Integral membrane proteins that facilitate diffusion are highly specific about their cargo D. All of the above, Biologydictionary.net Editors. A. synthesize proteins Biologydictionary.net, April 27, 2017. https://biologydictionary.net/diffusion/. 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. Direct link to Ivana - Science trainee's post Because it is faster to u, Posted 7 years ago. That is because the molecules from the food odor havent diffused into that space yet. 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. 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. Heroes and Highlights in the History of Diffusion. In other words, plasma . Both farming practices require considerable labor input because the fruit is picked by hand, making it a product of intensive agriculture. Privacy Policy and The hypertonic solution is one one side of the membrane and the hypotonic solution on the other. Concentric rings of different agricultural activities surrounding a city in the midwestern United States. What conditions affect the diffusion of a substance in water? 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. Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. In each cycle, three sodium ions exit the cell, while two potassium ions enter. A fish that lives in salt water will have somewhat salty water inside itself. 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? Na+ Ions move easily through water, which is polar, but cannot pass directly through the lipid (nonpolar) part of the cell membrane. does the glucose molecule just randomly attach itself to the protein when it's about to transport a sodium ion to the other side? PS1.A: Structure and Properties of Matter, PS3.C: Relationship Between Energy and Forces. Though water is a polar molecule, it can also diffuse through the plasma membrane. Diffusion is a physical process that refers to the net movement of molecules from a region of high concentration to one of lower concentration. What is the basic difference between simple diffusion and facilitated diffusion across a cell membrane? Which of the following best explains the importance of climate to agricultural practices? What separates the intracellular fluid from the extracellular fluid? 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. As an example, while gases and small molecules like methane or water can diffuse freely across a plasma membrane, larger charged molecules like carbohydrates or nucleic acids need the help of transmembrane proteins forming pores or channels. Conversely, in active transport, the solute moves against the concentration gradient, from regions of lower to higher concentration. Na+/K+ pump. diffusion: [noun] the state of being spread out or transmitted especially by contact : the action of diffusing. The material that diffuses could be a solid, liquid or gas. It s an accident, and I got a piece of land cheaply. What is the basic difference between simple diffusion and facilitated diffusion across a cell membrane? This process continues until the voltage across the membrane is large enough to counterbalance potassiums concentration gradient. We are not permitting internet traffic to Byjus website from countries within European Union at this time.

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