which of the following best explains diffusion?

What is the basic difference between simple diffusion and facilitated diffusion across a cell membrane? Pour all of the water down the sink, and wash out the glasses. If you're seeing this message, it means we're having trouble loading external resources on our website. Mr. Weddington was admitted to the hospital with chronic heart failure. 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. Here, the cell can't import glucose for free using diffusion, because the natural tendency of the glucose will be to diffuse. This results in crenation (shriveling) of the blood cell. Palm oil, an edible vegetable oil used in processing packaged food products, is obtained from the fruit of the oil palm tree, grown only in the tropics. In this experiment, you will experience how temperature affects the mixing of food coloring drops with water. Solution A and solution B are separated by a semipermeable membrane. selectively permeable: the characteristic of a membrane that allows some substances through but not others. Just like the first cup, the sugar is the solute, and the water is the solvent. The cell membrane has pores that let only water and glucose into the cell and carbon dioxide out. By diffusion: glucose will move from solution B to solution A. Which of the following correctly explains the relationship between wheat and its early hearth of domestication? Active transport mechanisms can be divided into two categories. The plants and animals diffused to a region with climate and geography similar to that of their point of domestication. As time progresses, the differential gradient of concentrations between high and low will drop (become increasingly . 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 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} \\ Which of the following best explains why farmers would plant both strawberries and watermelons in the same field? Which of the following explains an economic benefit of cattle production using feedlots rather than grass pastures? Limited farmland encourages intensive farming with intercropping to produce high yields. 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). Incorrect options: Option A is incorrect because space-time compression is the shortened time or communication between two places. This can occur with all sorts of matter, but is most commonly observed in liquids and gases. 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. shouldn't it be positively charged? Na+. Which of the following best describes the differences in the agricultural practices and land use for these products? The pump is now back to where it was in step 1, and the cycle can begin again. The second sugar solution is hypertonic to the first. This is also seen when two liquid reactants are mixed with one another. thank you. Similarly, two miscible liquids will also diffuse into each other to form a uniform solution. This barrier is called the plasma membrane, or cell membrane. There are certainly more numbers of potassium ions in the cells, but remember that there are greater numbers of sodium ions outside the cell (since for every three sodium ions moved out of the cells, two potassium ions enter the cell), therefore, resulting in a net positive charge outside the cell and net negative charge inside the cell. Do not mix or stir. & y_2^{\prime}=12 y_1 \\ 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. What is required for its transport? Posted 7 years ago. A. Identify the polar and nonpolar regions of a cell membrane. Similarly, the medium in which diffusion occurs could also be in one of the three physical states. 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). Spaeth, E. E., and Friedlander, S.K. For instance, when iodine is sublimated over a hot stove, purple fumes begin to appear and mix with air. "Diffusion. Direct link to William H's post If for example there are , Posted 5 years ago. 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. At 3M, we discover and innovate in nearly every industry to help solve problems around the world. For cell transport, diffusion is the movement of small molecules across the cell membrane. As a prokaryotic cell does not have a nucleus, the DNA is in the cytoplasm. In an antiporter it uses the energy of the ions flowing down their concentration gradient. Though water is a polar molecule, it can also diffuse through the plasma membrane. Human Anatomy & Physiology- MyLab & Mastering AandP- Ch 03 HW The cell is therefore not completely permeable. D. Golgi apparatus. 1. To log in and use all the features of Khan Academy, please enable JavaScript in your browser. How To Prolong Ejaculation During Intercourse? The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. A. 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. Simple diffusion and passive transport (article) | Khan Academy That is because the molecules from the food odor havent diffused into that space yet. What type of cellular extension have you observed? The cell membrane allows the cell to stay structurally intact in its water-based environment. A Diffusion provides encryption strength, while confusion provides data integrity B. Diffusion provides function integrity, while confusion provides encryption confidentiality. 1) The "sodium/glucose symporter", known as SGLT (sodium glucose linked transporter), receives the energy needed to perform its transport from the electrochemical gradient established by the sodium/potassium pump. Agricultural settlement patterns are partly determined by the survey system used to organize landownership. Through the process of uniculturalism, multiple types of foods are blended together into one cuisine. Imagine you're preparing a barbecue of grilled chicken and salad for friends. For example, while oxygen gas will diffuse slightly more quickly than carbon dioxide, both of them will move more quickly than iodine gas. Spontaneous activity releases energy, non-spontaneous activity (like moving something against its concentration gradient) requires energy. What assists the movement of substances by facilitated diffusion? Diffusion. to send you a reset link. 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 What is the basic difference between simple diffusion and facilitated diffusion across a cell membrane? 8.4: Osmosis and Diffusion - Chemistry LibreTexts Which of the following best explains the farming practice related to plantation agriculture? Through a process of passive diffusion, without the active involvement of any other molecule oxygen passes through the capillary membrane and enters cells. The kinetic energy of the molecules results in random motion, causing diffusion. This process does not require energy. Simple diffusion is merely the movement of molecules along their concentration gradient without the direct involvement of any other molecules. Which of the following best explains diffusion? Put the food coloring back where you found it. 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). 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. Solved 1. Which of the following best explains how water - Chegg Here, the cell can't import glucose for free using diffusion, because the natural tendency of the glucose will be to diffuse out rather than flowing in.Instead, the cell must bring in more glucose molecules via active transport.In active transport, unlike passive transport, the cell expends energy (for example, in the form of ATP) to move a substance against its concentration gradient. Microtubules are composed of protein subunits known as: Through the microscope, you see cells swimming. A. Explain the components present in a phospholipid. 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). Concentric rings of different agricultural activities surrounding a city in the midwestern United States. The term cytoplasm refers to the cytosol and all of the organelles, the specialized compartments of the cell. The English language became a widely spoken language in North America in the twentieth century. Because a solute moving down its concentration gradient is spontaneous. Typically, diffusion refers to the movement of molecules from high concentrations to lower concentrations. The first image shows a long-lot survey method with a linear settlement pattern, and the second image shows a metes-and- bounds survey method with a dispersed settlement pattern. Are these pumps negatively charge since they have a high affinity for the positive ions? Facilitated diffusion requires the assistance of proteins. 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?

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