which of the following best explains diffusion?

Question 16 30 seconds Q. An example of this is the way the noxious smell of ammonia gas spreads in air. Otherwise, tap the red Don't know box. Which of the following explains the diffusion and successful cultivation of many plants and animals in new regions of the world through the Columbian Exchange? A. smooth endoplasmic reticulum 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. movement of molecules from an area of high concentration to an area of low concentration. Why does the diffusion of the solute down its concentration gradient release energy? The SER detoxifies drugs and harmful substances ingested by and produced in the body. Which of the following best describes the impacts of the Second Agricultural Revolution? Passive transport is a way that small molecules or ions move across the cell membrane without input of energy by the cell. "Diffusion. Image 2 shows an innovation that occurred in the Second Agricultural Revolution, reducing the amount of labor needed and increasing crop yields. Put it in freshwater, and the freshwater will, through osmosis, enter the fish, causing its cells to swell, and the fish will die. Diffusion will continue until the concentration gradient has been eliminated. Direct link to long pham's post if there are more Potassi, Posted 6 years ago. This makes it easier for the dye to get mixed throughout the hot water. shouldn't it be positively charged? The end result is an equal concentration, or equilibrium, of molecules on both sides of the membrane. Direct link to Srichchha Pradhan's post There are certainly more , Posted 6 years ago. Which of the following is most likely to move through the cell membrane by facilitated diffusion? Question 56. Do you think the temperature of the food coloring might have an effect on how it diffuses? Direct link to auzennesylvester92's post Are these pumps negativel, Posted 5 years ago. Secondary active transport involves the movement of water by osmosis into a cell. If a person is severely dehydrated, their extracellular fluids will become hypertonic to the intracellular fluid. 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? 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. Direct link to liweiong272's post Main difference: In facil, Posted 6 years ago. 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. An open door is completely permeable to anything that wants to enter or exit through the door. The mechanization of farming in the Second Agricultural Revolution resulted in more reliable crop harvests and healthier populations in areas where the mechanization was adopted. Which of the following best explains the risks associated with pesticide applications? This increases the rate at which solute and solvent molecules move, and increases collisions. Obviously, the cell could not survive in such an environment. Secondary active transport involves the movement of a substance into a cell through a protein channel with its concentration gradient. Which of the following compares this geographic relationship between these revolutions? Which of the following solutions will cause a red blood cell to shrink? The two images represent two different methods of raising livestock in the United States. The molecules move from a region of higher concentration to a region of lower concentration until the concentration becomes equal . Which of the following is the main component of the cell membrane? Your email address is only used to allow you to reset your password. While they are confined to the smaller surface area within the crucible, the rate of diffusion remains low. i dont quite understand the secondary active transport. Remember that there is water outside the cell, and the cytoplasm inside the cell is mostly water as well. One and a Half Century of Diffusion: Fick, Einstein, before and beyond. B. smooth endoplasmic reticulum Microtubules are composed of protein subunits known as: Through the microscope, you see cells swimming. Which of the following best explains the diffusion of plants and animals from their hearths of domestication? Small-scale farmers in Asia often lacked the resources necessary to acquire the hybrid . Eventually, the concentration of "stuff" on either side of them will even out. Be sure to clean up when you are done. At that concentration, the solution is isotonic to the cell. 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're seeing this message, it means we're having trouble loading external resources on our website. Which of the following best explains the process illustrated by the image? Primary active transport, secondary active transport, exocytosis, and endocytosis are all what type of process? this monosaccharide yields the most energy of all macromolecules. 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 best explains the potential impact of rising global temperatures on agricultural regions? 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? Stirring increases the area of interaction between the two chemicals and allows these molecules to diffuse towards each other more quickly. what is the main difference between active transport using a carrier protein, and passive transport using facilitated diffusion? The reaction proceeds as the two reactants diffuse towards each other and undergo a chemical reaction to form esters. Nerve cells do not have centrioles. Even though this is random non-directed movement, with a large bulk, it can create a scenario where there is no net movement of gas from the container. A red blood cell will swell and undergo hemolysis (burst) when placed in a hypotonic solution. Which of the following best explains diffusion? 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. Since diffusion is powered primarily by the probability of molecules moving away from a region of higher saturation, it immediately follows that when the medium (or solvent) has a very low concentration of the solute, the probability of a molecule diffusing away from the central area is higher. 0 To produce a mRNA molecule to deliver the genetic instructions outside the nucleus. To see how well you know the information, try the Quiz or Test activity. When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. a.QH=500kW,QC=100kWb.QH=500kW,Wcycle=250kW,QC=200kWc.Wcycle=350kW,QC=150kWd.QH=500kW,QC=200kW\begin{array}{l}{\text { a. } 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. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out. The brands listed above are trademarks of 3M. Which of the following scenarios best explains the Columbian Exchange? Secondary active transport uses the energy stored in these gradients to move other substances against their own gradients. To move substances against a concentration or electrochemical gradient, a cell must use energy. 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. Red blood cells behave the same way (see figure below). This is related to both the mass of the molecule and its surface area. In an isotonic solution, the flow of water in and out of the cell is happening at the same rate. 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. 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) Which of the following best compares a technological consequence of the Green Revolution in more developed and less developed countries? Figure showing the transport cycle of the sodium-potassium pump. A. Facilitated diffusion is necessary for the movement of large or polar molecules across the hydrophobic lipid bilayer. Concentric rings of different agricultural activities surrounding a city in the midwestern United States. Which of the following explains an economic benefit of cattle production using feedlots rather than grass pastures? Question 12 30 seconds Q. Direct link to tyersome's post Great question since pr, Posted 7 years ago. 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. Which of the following explains an impact of globalized agricultural commodity chains on consumers as compared to producers? The majority of water molecules moving across plasma membranes by osmosis do so via a process that is most similar to ____. Which of the following is the best situation for maintaining homeostasis? In this form, the pump really likes to bind (has a high affinity for) sodium ions, and will take up three of them. If the concentration of dextrose in the solution is increased to 5%, the cell is now in a(n): The total solute concentration of a red blood cell is about 2%. One phosphate group from ATP is attached to the pump, which is then said to be phosphorylated. 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. Grocery stores sell oranges that are grown in locations with similar climates but different growing seasons. Which of the following best explains the farming practice related to plantation agriculture? \dot{Q}_{\mathrm{H}}=500 \mathrm{kW}, \dot{Q}_{\mathrm{C}}=100 \mathrm{kW}} \\ {\text { b. } Which of the following processes require the use of protein carrier molecules? Channels Channel proteins span the membrane and make hydrophilic tunnels across it, allowing their target molecules to pass through by diffusion. Solution A and solution B are separated by a semipermeable membrane. This is because in hot water, the water molecules have more energy and are moving faster than the molecules of cold water. Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. A cell is isotonic to the surrounding 4% dextrose solution. Why Do Giant Pandas Have Low Libido? In less developed countries, pesticides are typically applied by hand, whereas pesticides are typically applied by tractors or aircraft in more developed countries. Which of the following is NOT one of the functions of the cytoskeleton? QUESTION 28 Which of the following best explains the role of transcription in a cell? The image shows the movement of an insoluble molecule from the extracellular space towards the cytoplasm. ; Diffusion occurs in liquids and gases when their particles collide randomly and . Diffusion is the movement when molecules move from higher concentrated area to lower concentrated area. Look at the large card and try to recall what is on the other side. All the ways scientists do investigations. he Na+\mathrm{Na}^{+}Na+concentration of a solution was determined by measurement with a sodium ion-selective electrode. For instance, one of the ways in which polyester is synthesized is by mixing the appropriate organic acid and alcohol in their liquid form. Direct link to Ivana - Science trainee's post Because it is faster to u, Posted 7 years ago. sideropenia _____________________________________________________. 1. Make sure to remember your password. y1=3y2y2=12y1. In biological systems, diffusion occurs at every moment, across membranes in every cell as well as through the body. The reaction proceeds towards completion at a faster rate. A process that requires energy to move a substance against its concentration gradient is called: The Na+/K+ pump transports three sodium ions out of the cell for every two potassium ions moved into the cell. His feet and legs were swollen with fluid. B. One of the main characteristics of diffusion is the movement of molecules along the concentration gradient. At the exact same time, add 2-3 drops off food coloring into each glass. Your cells have a plasma membrane that helps to guard your cells from unwanted intruders. Imagine you have a cup that has \(100 \: \text{mL}\) water, and you add \(15 \: \text{g}\) of table sugar to the water. ", Biologydictionary.net Editors. How To Use Patchouli Oil For Erectile Dysfunction? 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. 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? A number of colonies were established and settled by people from Great Britain. What do you predict will happen to the person's cells? 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? Through a process of passive diffusion, without the active involvement of any other molecule oxygen passes through the capillary membrane and enters cells. 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} \\ Actually, Sodium does go down its gradient but through specialized Sodium channels. If the ECF is more concentrated than the cytosol, then the ECF is: A primary active transport process is one in which __________. It can involve either the spreading of a material through a medium or the transport of a particle across a membrane. 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. Farmers' health is at risk in less developed countries, whereas environmental pollution is a risk in more developed countries. Through the process of uniculturalism, multiple types of foods are blended together into one cuisine. Na+. Prior to this, very few animals had been domesticated in the Americas. It is an important process occurring in all living beings. A. synthesize proteins The cell membrane lets certain substances enter the cell and keeps certain substances out of the cell. If you knew the answer, tap the green Know box. Direct link to priciaauy's post why wouldnt cells use atp, Posted 4 years ago. Each of these factors, independently and collectively can alter the rate and extent of diffusion. Image depicting the charge and ion distribution across the membrane of a typical cell. Cells utilize oxygen in the mitochondria for aerobic respiration, which generates carbon dioxide gas as a byproduct. Which of the following best explains the importance of climate to agricultural practices? When the sodium ions bind, they trigger the pump to hydrolyze (break down) ATP. Active transport mechanisms can be divided into two categories. Fish cells, like all cells, have semipermeable membranes. If the cell is moved to a 6% dextrose solution, then predict what will happen to the cell. Because it is faster to utilize already available ATP through the electrochemical gradient. Background. Facilitated diffusion requires the assistance of proteins. This example also shows that the diffusion of any one material is independent of the diffusion of any other substances. The best explanation for the diffusion of plants and animals from their hearths of domestication is option C. Contagious diffusion in the early years was a way of spreading from one person to the other. 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. Large polar molecules cannot diffuse across a biological membrane B. (2005). A vesicle fuses with the plasma membrane and releases its contents to the extracellular fluid. The IV fluid should be isotonic to the patient's blood. Direct link to Dovid Shaw's post how does the antiporter p, Posted 7 years ago. Wipe up any spills that may have happened. In fact, cells spend much of the energy they harvest in metabolism to keep their active transport processes running. How To Prolong Ejaculation During Intercourse? This process does not require energy. In the context of the Second Agricultural Revolution, which of the following trends is represented in these images? 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. Which of the following is a characteristic of the cell membrane? Banana plants were brought to Central America from Southeast Asia to be grown closer to markets in the United States and Canada. Epinephrine is taken into the cell by endocytosis; glycogen is converted to glucose in the endocytotic vesicle. Typically, diffusion refers to the movement of molecules from high concentrations to lower concentrations. This statement describes _____. Plantation farming is considered to be an intensive farming practice because it requires large inputs of labor and capital to produce the crop. Drought and depletion of groundwater sources in developing countries cause a rise in global grain prices and associated higher costs for food. Because of the hydrophilic and hydrophobic nature of the phospholipid, the molecule must be arranged in a specific pattern as only certain parts of the molecule can physically be in contact with water. 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. Similarly, if a canister of liquid nitrogen leaks a little, nitrogen gas that escapes would quickly diffuse into the atmosphere. 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. Water moves into and out of cells by osmosis. Which one of the following processes can explain this? Which of the following best explains diffusion? (Show the details. Determine the type of membrane transport used to transport these sodium ions. Which of the following best explains why tea plantations are common in Sri Lanka and tea exports are important to the country's economy? Which of the following statements most accurately compares these two agricultural practices? In an antiporter it uses the energy of the ions flowing down their concentration gradient. Several large cities on the East Coast provide a growing market and shorter distances for transporting market gardening products. Similarly, the medium in which diffusion occurs could also be in one of the three physical states. 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. C. The IV fluid should be hypertonic to the patient's blood. C. movement of molecules from an area of high concentration to an area of low concentration. 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). The number of molecules that only collide with other carbon dioxide particles within dry ice decreases. Even in large industrial reactions, when two liquids are mixed together, diffusion brings the reactants together and allows the reaction to proceed smoothly. 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. Which of the following is not a passive process? The plants and animals diffused to a region with climate and geography similar to that of their point of domestication. 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. However, the same phenomenon is not seen when immiscible liquids like petrol and water are mixed together. Biologydictionary.net Editors. 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). A. How is the , Posted 7 years ago. The IV fluid should be isotonic to the patient's blood. Explain the components present in a phospholipid.

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