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

Nuclear pores connect the cytoplasm with the nucleoplasm and allow substances to move between the two areas. The use of improved plant hybrids and agricultural chemicals. It can involve either the spreading of a material through a medium or the transport of a particle across a membrane. Which of the following explains an impact of globalized agricultural commodity chains on consumers as compared to producers? Diffusion. What conditions affect the diffusion of a substance in water? Diffusion is the process of movement of molecules under a concentration gradient. Water is attracted to the compartment with a lower osmotic pressure. B. ribosome 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 . 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? Make sure to remember your password. Which of the following best describes the survey system used in both locations shown? What would happen if a cell dissolved in water, like sugar does? Passive Transport | Biology I - Lumen Learning 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. Which of the following best explains diffusion? This is usually not directed in any particular manner, and can appear random. Imagine this just like a hydroelectric power station uses the energy of water flowing down the waterfall to create electricity. When oxygen is moving towards tissues from capillaries, carbon dioxide is entering the bloodstream. What do you predict will happen to the person's cells? Small-scale farmers in Asia often lacked the resources necessary to acquire the hybrid seeds and the chemical inputs to grow them, leaving large gaps in the success of the Green Revolution outside of urban cores. Electrochemical gradients and the membrane potential. What type of cellular extension have you observed? 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. The tonicity of the IV fluid doesn't matterthe patient won't be in the operating room that long so any tonicity would be OK for a couple of hours. Banana plants were brought to Central America from Southeast Asia to be grown closer to markets in the United States and Canada. At this balance point, the inside of the membrane is negative relative to the outside. Cells placed in a hypotonic solution will take in water across their membranes until both the external solution and the cytosol are isotonic. This statement describes _____. And sodium is highly concentrated outside of the cell, so that's where it goes during active transport considering it is low to high concentration. movement of molecules from an area of high concentration to an area of low concentration. He should be given a hypotonic drip to draw fluid out of his cells. Which of the following best explains diffusion? Diffusion is the mixing of substances due to the movement of their particles. The image shows the movement of an insoluble molecule from the extracellular space towards the cytoplasm. Grocery stores sell oranges that are grown in locations with similar climates but different growing seasons. Determine the type of membrane transport used to transport these sodium ions. answer choices Through the process of ethnocentrism, American culture has spread throughout the world. what is the main difference between active transport using a carrier protein, and passive transport using facilitated diffusion? When the roommate told the Emergency Department doctor what had happened, the doctor quickly began administering IV (intravenous) fluids. ADP is released as a by-product. Which of the following is not a major function of proteins in the cell membrane? Plantation farming is considered to be an intensive farming practice because it requires large inputs of labor and capital to produce the crop. If you've accidentally put the card in the wrong box, just tap on the card to take it out of the box. Both systems require geometric calculations to survey property lines. The images shown illustrate the differences in scale of production for two methods of producing thread. Which of the following explains why multiple early hearths of domestication and diffusion of plants and animals arose across the world in Central America, the Fertile Crescent, the Indus River valley, and Southeast Asia? 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. Human Anatomy & Physiology- MyLab & Mastering AandP- Ch 03 HW What Is Diffusion? - Definition, Types & Examples Of Diffusion - BYJUS solute: a substance dissolved in another to form a solution. 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). What separates the intracellular fluid from the extracellular fluid? Cytosol is composed of water and other molecules, including enzymes, which are proteins that speed up the cell's chemical reactions. Hi, I'm just a little curious, why can't 3 potassium ions be pumped out and 2 sodium ions pumped in(the other way around)? A. The passive process that involves the movement of water through aquaporins is ________. A vesicle fuses with the plasma membrane and releases its contents to the extracellular fluid. The image is a simple representation of the diffusion of one particle in another medium. movement of molecules from an area of high concentration to an area of low concentration Which of the following is most likely to move through the cell membrane by facilitated diffusion? During the Green Revolution, agricultural practices from more developed countries diffused to less developed countries in Asia and Africa. Your email address is only used to allow you to reset your password. A not very well-studied A&P student heard about a phenomenon called water intoxication and thought it sounded fun so she decided to try it. If you say something, I ll ask someone at what age erectile dysfunction starts to clean it up. Diffusion is the mixing of substances due to the movement of their particles. Which of the following best explains the reasons for the similarities and differences between the two land survey systems shown? Which of the following is a characteristic of the cell membrane? This statement describes _____. y1=3y2y2=12y1. You can also use your keyboard to move the cards as follows: If you are logged in to your account, this website will remember which cards you know and don't know so that they Which of these statements about diffusion of molecules is true? Do not mix or stir. ; Diffusion occurs in liquids and gases when their particles collide randomly and . C. peroxisome Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. A substance moves by facilitated diffusion into a cell. Which of the following best explains this change? this monosaccharide yields the most energy of all macromolecules. 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? One of the main characteristics of diffusion is the movement of molecules along the concentration gradient. Facilitated diffusion is necessary for the biochemical processes of every cell since there is communication between various subcellular organelles. Therefore, they are NOT able to __________. 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. 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. \dot{Q}_{\mathrm{H}}=500 \mathrm{kW}, \dot{W}_{\text {cycle }}=250 \mathrm{kW}, \dot{Q}_{\mathrm{C}}=200 \mathrm{kW}} \\ {\text { c. } \dot{W}_{\text {cycle }}=350 \mathrm{kW}, \dot{Q}_{\mathrm{C}}=150 \mathrm{kW}} \\ {\text { d. } \dot{Q}_{\mathrm{H}}=500 \mathrm{kW}, \dot{Q}_{\mathrm{C}}=200 \mathrm{kW}}\end{array} Secondary active transport uses the energy stored in these gradients to move other substances against their own gradients. 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. selectively permeable: the characteristic of a membrane that allows some substances through but not others. This may seem like a complicated cycle, but it just involves the protein going back and forth between two forms: an inward-facing form with high affinity for sodium (and low affinity for potassium) and an outward-facing form with high affinity for potassium (and low affinity for sodium). The Diffusion of Oxygen, Carbon Dioxide, and Inert Gas in Flowing Blood. Your cells have a plasma membrane that helps to guard your cells from unwanted intruders. 266X15aX+baY+32b. Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of higher concentration to an area of lower concentration. Large polar molecules cannot diffuse across a biological membrane B. 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. Sucrose cannot pass through a red blood cell's plasma membrane, but water and urea can. Which of the following is not required for osmosis to occur? These farmers and traders exchanged the domesticated plants between themselves. Which cell junctions prevent substances from passing between adjacent cells? Therefore, muscle cells have numerous: Which statement regarding the smooth endoplasmic reticulum (SER) is false? The hypertonic solution is one one side of the membrane and the hypotonic solution on the other. 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. Which of the following is most likely to move through the cell membrane by facilitated diffusion? Nerve cells do not have centrioles. A cell is placed into a 3% dextrose solution. 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). 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? This apparent slowing down is due to the fact that, over time, the larger container begins to have enough iodine gas that some of it will be moving backwards towards the crucible. 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. 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. Which of the following best explains the significance of similarities between the farming practices for apple orchards and grape vineyards? Biology Dictionary. Though water is a polar molecule, it can also diffuse through the plasma membrane. You would need to create a new account. Direct link to Stocke's post Why does the diffusion of, Posted 7 years ago. 2.1: Osmosis - Biology LibreTexts Some molecules can go through the cell membrane to enter and leave the cell, but some cannot. This page titled 8.4: Osmosis and Diffusion is shared under a CK-12 license and was authored, remixed, and/or curated by CK-12 Foundation. Which of the following best describes advances in the production of textiles during the Second Agricultural Revolution and the Industrial Revolution? 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. Which of the following solutions will cause a red blood cell to shrink? serve as the site for metabolic reactions such as protein synthesis. how does the antiporter provide energy for molecules to go in the "opposite" direction? i dont quite understand the secondary active transport. Process of Osmosis vs. Diffusion . The images shown illustrate a change that took place as the Second Agricultural Revolution coincided with the Industrial Revolution. Similarly, two miscible liquids will also diffuse into each other to form a uniform solution. Based on the map above, explain the degree to which lettuce production takes place in the United States. answer choices The English language initially diffused to North America through the process of relocation diffusion. Which of the following best explains diffusion? Which of the following solutions contains the most solute? To see how well you know the information, try the Quiz or Test activity. The membrane connections that prevent the leaking of fluid between cells are called ________. At this point, equilibrium is reached. O To edit the mRNA strand and make it ready to leave the nucleus. 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. Drought and depletion of groundwater sources in developing countries cause a rise in global grain prices and associated higher costs for food. Which of the following best explains how a wheat farmer in the Northern Plains region of the United States is able to maximize profits? Which of the following is most likely to move through the cell membrane by facilitated diffusion? 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. The electrochemical gradients set up by primary active transport store energy, which can be released as the ions move back down their gradients. Figure showing the transport cycle of the sodium-potassium pump. a.QH=500kW,QC=100kWb.QH=500kW,Wcycle=250kW,QC=200kWc.Wcycle=350kW,QC=150kWd.QH=500kW,QC=200kW\begin{array}{l}{\text { a. } See our This can occur with all sorts of matter, but is most commonly observed in liquids and gases. Diffusion is the movement of molecules from an area of high concentration of the molecules to an area with a lower concentration. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. This process takes place in the following steps: To begin, the pump is open to the inside of the cell. Passive transport is a way that small molecules or ions move across the cell membrane without input of energy by the cell. A. One phosphate group from ATP is attached to the pump, which is then said to be phosphorylated. Posted 7 years ago. The mixture of a solute in a solvent is called a solution. Facilitated diffusion requires the assistance of proteins. molecules move through transport proteins that have been activated by ATP. 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. Simple diffusion and osmosis do not involve transport proteins. C. movement of molecules from an area of high concentration to an area of low concentration. Although one of these refers to chemical properties and the latter social interaction, both are examples or diffusion. This creates a concentration gradient, with concentration of carbon dioxide gradually decreasing with distance from the lump of dry ice. osmosis, simple diffusion, facilitated diffusion are all what type of process? That is because the molecules from the food odor havent diffused into that space yet. Which of these statements is NOT true? Tea plantations were established in Sri Lanka by a former European colonial power. Diagram of a sodium-glucose cotransporter, which uses the energy stored in a sodium ion gradient to transport glucose "uphill" against its gradient. In facilitated diffusion, molecules only move with the aid of a protein in the membrane. What is required for its transport? If you're seeing this message, it means we're having trouble loading external resources on our website. A&P HW 5 Flashcards | Quizlet The Green Revolution led to an increase in food production in many places around the world, but there have been some negative consequences. 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 NOT one of the functions of the cytoskeleton? B. smooth endoplasmic reticulum Which of the following best explains the farming practice related to plantation agriculture? Explain why and how passive transport occurs; Understand the processes of osmosis and diffusion; Define tonicity and describe its relevance to passive transport; Plasma membranes must allow certain substances to enter and leave a cell, while preventing harmful material from entering and essential material from leaving. Which of the following is the best situation for maintaining homeostasis? Active transport works by using a phosphate group from ATP to change the shape of the protein and thus do work.