which of the following best explains diffusion?
The mechanization of farm work allowed many young people to migrate and join a growing urban industrial workforce. Identify the polar and nonpolar regions of a cell membrane. Which of the following best describes advances in the production of textiles during the Second Agricultural Revolution and the Industrial Revolution? This process takes place in the following steps: To begin, the pump is open to the inside of the cell. While they are confined to the smaller surface area within the crucible, the rate of diffusion remains low. In facilitated diffusion, molecules only move with the aid of a protein in the membrane. This results in swelling of the cell and potential hemolysis (bursting) of the cell. At that concentration, the solution is isotonic to the cell. Diffusion helps in the movement of substances in and out of the cells. Technological innovations, such as the devices shown in the images, and increased agricultural productivity led to better diets, longer life expectancies, and more people available for work in factories. In general, to maintain homeostasis the relationship between our intracellular and extracellular fluids should be which of the following? The liver is an organ that can synthesize lipids, such as cholesterol, and detoxify poisons, such as alcohol. To see how well you know the information, try the Quiz or Test activity. With the phosphate group gone, the pump will change back to its original form, opening towards the interior of the cell. Facilitated diffusion requires the assistance of proteins. Prior to this, very few animals had been domesticated in the Americas. Increase C. Decrease D. It would depend on the nature and temperature of the coolant, 3. This electricity can do work. 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? Diagram of a sodium-glucose cotransporter, which uses the energy stored in a sodium ion gradient to transport glucose "uphill" against its gradient. Which of these statements is NOT true? See our When oxygen is moving towards tissues from capillaries, carbon dioxide is entering the bloodstream. 60 seconds. Which of the following best explains the potential impact of rising global temperatures on agricultural regions? Your cells have a plasma membrane that helps to guard your cells from unwanted intruders. 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. It can involve either the spreading of a material through a medium or the transport of a particle across a membrane. Eventually, the concentration of "stuff" on either side of them will even out. Image depicting the charge and ion distribution across the membrane of a typical cell. molecules move through transport proteins that have been activated by ATP. Which of the following best explains the importance of climate to agricultural practices? "Diffusion. what is the main difference between active transport using a carrier protein, and passive transport using facilitated diffusion? In less developed countries, pesticides are typically applied by hand, whereas pesticides are typically applied by tractors or aircraft in more developed countries. C. Diffusion provides ciphertext heterogeneity, while confusion provides algorithm This problem has been solved! Would remain unchanged B. Which of the following best explains diffusion? At this balance point, the inside of the membrane is negative relative to the outside. What do you predict will happen to the person's cells? 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. C. Secondary active transport occurs when the movement of one substance is coupled with the passive transport of a second substance. (Show the details. 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). 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). Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of higher concentration to an area of lower concentration. Simple diffusion and osmosis do not involve transport proteins. 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. This is related to both the mass of the molecule and its surface area. If the outside environment of a cell is water-based, and the inside of the cell is also mostly water, something has to make sure the cell stays intact in this environment. What is required for its transport? The inside of all cells also contain a jelly-like substance called cytosol. 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. 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? He should be given a hypotonic drip to draw fluid out of his cells. As a prokaryotic cell does not have a nucleus, the DNA is in the cytoplasm. Na+. However, for molecules in the periphery, rapidly moving molecules in the air also influence their movement, allowing them to diffuse into the air. Have you ever colored a picture with marker and noticed that two touching colors begin to bleed together? Predict what will happen to a patient's red blood cells if you give the patient an IV of pure water. For example, how might this play into why coffee and tea always start with hot water? ), y1=3y2y2=12y1\begin{aligned} does the glucose molecule just randomly attach itself to the protein when it's about to transport a sodium ion to the other side? A. Golgi apparatus 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. Fish cells, like all cells, have semipermeable membranes. 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. Active transport works by using a phosphate group from ATP to change the shape of the protein and thus do work. Which of the following solutions contains the most solute? As a simple example, a few crystals of sugar in a glass of water will slowly dissolve over time. answer choices The greater the difference in concentration, the quicker the rate of diffusion. How is the , Posted 7 years ago. Which of the following best explains how a wheat farmer in the Northern Plains region of the United States is able to maximize profits? All the examples given above were instances of simple diffusion. She consumed a large amount of water in a short time (Don't try thiswater intoxication is often fatal.). B. Which of the following best explains why tea plantations are common in Sri Lanka and tea exports are important to the country's economy? This process does not require energy. Therefore, the rate of diffusion of the gas into air also increases. Examples of molecules that can easily diffuse across the plasma membrane include carbon dioxide and oxygen gas. { "8.1:_Concentrations_of_Solutions" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.