which of the following best explains diffusion?

The sodium-potassium pump transports sodium out of and potassium into the cell in a repeating cycle of conformational (shape) changes. The second sugar solution is hypertonic to the first. An example of this is the way the noxious smell of ammonia gas spreads in air. In fact, cells spend much of the energy they harvest in metabolism to keep their active transport processes running. In the South Asian country of Sri Lanka, tea is farmed as a monoculture. Your email address is only used to allow you to reset your password. In facilitated diffusion, molecules only move with the aid of a protein in the membrane. 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. Direct link to zykeriaprice2's post what is the main differen, Posted 7 years ago. A fish that lives in salt water will have somewhat salty water inside itself. 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. ; Diffusion occurs in liquids and gases when their particles collide randomly and . Identify the polar and nonpolar regions of a cell membrane. The material that diffuses could be a solid, liquid or gas. This statement describes _____. What Is Diffusion? - Definition, Types & Examples Of Diffusion - BYJUS Which of the following best explains the significance of similarities between the farming practices for apple orchards and grape vineyards? A cell is isotonic to the surrounding 4% dextrose solution. Which of the following solutions contains the most solute? Which of these statements is NOT true? if there are more Potassium ions in a cell, how is the cell negatively charged? Glucose is the most commonly used energy source by human cells because (Points: 1) this is the most abundant macromolecule available for cellular respiration. 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. For example, how might this play into why coffee and tea always start with hot water? Solution A and solution B are separated by a semipermeable membrane. Each of these factors, independently and collectively can alter the rate and extent of diffusion. Since they are relatively large openings in the plasma membrane, these integral membrane proteins also have high specificity. As a result of the EUs General Data Protection Regulation (GDPR). Are these pumps negatively charge since they have a high affinity for the positive ions? B. digest and recycle damaged organelles A. The pump is now back to where it was in step 1, and the cycle can begin again. 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. A. concentrated salt solution. Which one of the following processe | Filo 3.5 Passive Transport - Concepts of Biology - 1st Canadian Edition Facilitated diffusion is necessary for the movement of large or polar molecules across the hydrophobic lipid bilayer. 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. Here, the cell can't import glucose for free using diffusion, because the natural tendency of the glucose will be to diffuse. In any system, molecules are moving with a certain amount of kinetic energy. Mastering A&P Chapters 1-3 Flashcards | Quizlet 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. C. Secondary active transport occurs when the movement of one substance is coupled with the passive transport of a second substance. A Diffusion provides encryption strength, while confusion provides data integrity B. Diffusion provides function integrity, while confusion provides encryption confidentiality. After addition of 1.00mL1.00 \mathrm{~mL}1.00mL of 2.00102M2.00 \times 10^{-2} \mathrm{M}2.00102M NaCl\mathrm{NaCl}NaCl, the potential changed to 0.1846V-0.1846 \mathrm{~V}0.1846V. Calculate the Na+\mathrm{Na}^{+}Na+concentration of the original solution. In simple diffusion, this process proceeds without the aid of a transport protein. Which of the following explains why oranges are available. 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. Tea plantations were established in Sri Lanka by a former European colonial power. Overall, there are more positive charges on the outside of the membrane than on the inside. The material that diffuses could be a solid, liquid or gas. Direct link to l's post Questions: Prior to this, very few animals had been domesticated in the Americas. In the case of a cell, positive and negative charges are separated by the barrier of the cell membrane, with the inside of the cell having extra negative charges relative to the outside. Which of the following best describes the survey methods used to delineate agricultural land and the associated settlement patterns shown in the tw. 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. "Diffusion. Solutions of equal solute concentration are isotonic. 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. 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. This property can be observed even better if the gas has an odor or color. Privacy Policy and Process of Osmosis vs. Diffusion . Therefore, the rate of diffusion of the gas into air also increases. Lettuce production in the United States is an example of commercial farming. Small-scale farmers in Asia often lacked the resources necessary to acquire the hybrid . Which of the following scenarios best explains the Columbian Exchange? In an antiporter it uses the energy of the ions flowing down their concentration gradient. When the sodium ions bind, they trigger the pump to hydrolyze (break down) ATP. When they move in the same direction, the protein that transports them is called a. A. gradient? All the ways scientists do investigations. Predict behavior of blood cells in different solution types. Which of the following best describes advances in the production of textiles during the Second Agricultural Revolution and the Industrial Revolution? Imagine this just like a hydroelectric power station uses the energy of water flowing down the waterfall to create electricity. As a simple example, a few crystals of sugar in a glass of water will slowly dissolve over time. For cell transport, diffusion is the movement of small molecules across the cell membrane. Passive transport and active transport across a cell membrane article Figure showing the transport cycle of the sodium-potassium pump. D. Secondary active transport involves the movement of a substance into a cell with its concentration gradient. 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 of a substance from an area of high concentration to an area of lower concentration. Irrigation increases the salt content of the soil, which disrupts the growth of crops and degrades soil fertility. Which of the following is least likely to increase the rate of diffusion? A. synthesize proteins If a person is severely dehydrated, their extracellular fluids will become hypertonic to the intracellular fluid. A vesicle fuses with the plasma membrane and releases its contents to the extracellular fluid. Some molecules can go through the cell membrane to enter and leave the cell, but some cannot. sideropenia _____________________________________________________. Passive processes that move substances across membranes ________. Since diffusion moves materials from an area of higher concentration to the lower, it is described as moving solutes "down the concentration gradient". 1. Although one of these refers to chemical properties and the latter social interaction, both are examples or diffusion. Remember that there is water outside the cell, and the cytoplasm inside the cell is mostly water as well. 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? The electrochemical gradients set up by primary active transport store energy, which can be released as the ions move back down their gradients. 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. If you say something, I ll ask someone at what age erectile dysfunction starts to clean it up. The number of molecules that only collide with other carbon dioxide particles within dry ice decreases. _{15}^{\mathrm{a}} \mathrm{X} & \rightarrow \beta+^{32} \mathrm{b} \end{aligned} If sublimation is carried out in a narrow crucible, the fumes diffuse slowly out towards the mouth of the container and then rapidly disappear. Direct link to William H's post If for example there are , Posted 5 years ago. Which of the following is not required for osmosis to occur? The cell is therefore not completely permeable. Midlatitude climates tend to support similar agricultural crops and practices, such as wheat farming in the United States and China. Diffusion is the movement of molecules from an area of high concentration of the molecules to an area with a lower concentration. Banana plants were brought to Central America from Southeast Asia to be grown closer to markets in the United States and Canada. Imagine you have a cup that has \(100 \: \text{mL}\) water, and you add \(15 \: \text{g}\) of table sugar to the water. Solution A and solution B are separated by a semipermeable membrane. The rate of diffusion of a gas across a surface is controlled by the following: k, the gas diffusion constant; A, the area for gas exchange; P2-P1, the difference in partial pressure of gas on either side of diffusion barrier; D, the distance across which the gas must diffuse (thickness of diffusion barrier) http://physrev.physiology.org/content/91/2/733, https://phys.org/news/2013-10-mechanism-sodium-potassium-revealed.html. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. When the roommate told the Emergency Department doctor what had happened, the doctor quickly began administering IV (intravenous) fluids. What do you predict will happen to the person's cells? 8.4: Osmosis and Diffusion - Chemistry LibreTexts Learn more about how this experiment is based in NGSS Disciplinary Core Ideas. Diffusion is affected by temperature, area of interaction, steepness of the concentration gradient and particle size. thank you. 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. answer choices The English language initially diffused to North America through the process of relocation diffusion. So the phospholipids are arranged in a double layer (a bilayer) to keep the cell separate from its environment. Heroes and Highlights in the History of Diffusion. Which of the following solutions contains the most solute? Have you ever colored a picture with marker and noticed that two touching colors begin to bleed together? Which of the following solutions will cause a red blood cell to shrink? The sodium-potassium pump uses ATP to move sodium and potassium ions across the plasma membrane. Explanation: When a substance moves from higher concentrated area to a lower concentrated area, is called as diffusion. 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? 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. She consumed a large amount of water in a short time (Don't try thiswater intoxication is often fatal.). The Diffusion of Oxygen, Carbon Dioxide, and Inert Gas in Flowing Blood. Eventually, the concentration of "stuff" on either side of them will even out. Nuclear pores connect the cytoplasm with the nucleoplasm and allow substances to move between the two areas. The difference in the concentrations of the molecules in the two areas is called the concentration gradient. Which of the following best describes the settlement patterns shown in the images? 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? to send you a reset link. The mixture of a solute in a solvent is called a solution. In most biological systems, diffusion occurs across a semi-permeable membrane made of a lipid bilayer. Which cell junctions prevent substances from passing between adjacent cells? On a similar note, any solute that is broken into small pieces and stirred into the solvent dissolves rapidly another indicator of molecules diffusing better when the area of interaction increases. Intensive agriculture is practiced in a Mediterranean climate. The IV fluid should be isotonic to the patient's blood. 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 A&P lecture 1 chp 3 Flashcards | Chegg.com 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. ADP is released as a by-product. 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. Which of the following best compares a technological consequence of the Green Revolution in more developed and less developed countries? Comparing the two images, which survey system was more efficient in terms of trade? In this experiment, the food coloring that gets added is the same temperature in each of the hot and cold water tests. 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. Direct link to Ivana - Science trainee's post yes, dimensions also play. Which of the following best explains why the New England region, located in the northeastern United States, would specialize in market gardening agriculture rather than other types of agriculture, such as grain farming? Limited farmland encourages intensive farming with intercropping to produce high yields. Which of the following is the best situation for maintaining homeostasis? C. detoxify certain chemicals D. through oxidation reactions Diffusion Definition & Meaning - Merriam-Webster 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).

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