which of the following best explains diffusion?

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 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 the basic difference between simple diffusion and facilitated diffusion across a cell membrane? Heroes and Highlights in the History of Diffusion. For example, how might this play into why coffee and tea always start with hot water? Which of the following best explains diffusion? B. smooth endoplasmic reticulum Facilitated diffusion is powered entirely by GTP hydrolysis B. How To Use Patchouli Oil For Erectile Dysfunction? The liver is an organ that can synthesize lipids, such as cholesterol, and detoxify poisons, such as alcohol. If you're seeing this message, it means we're having trouble loading external resources on our website. Imagine this just like a hydroelectric power station uses the energy of water flowing down the waterfall to create electricity. Direct link to Samuel Mayer's post In an antiporter it uses , Posted 7 years ago. One of the main characteristics of diffusion is the movement of molecules along the concentration gradient. 1. 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. Therefore, muscle cells have numerous: Which statement regarding the smooth endoplasmic reticulum (SER) is false? Which of the following is not required for osmosis to occur? However, for molecules in the periphery, rapidly moving molecules in the air also influence their movement, allowing them to diffuse into the air. Describe flow of solvent molecules across a membrane. (2005). Direct link to long pham's post if there are more Potassi, Posted 6 years ago. Banana plants were brought to Central America from Southeast Asia to be grown closer to markets in the United States and Canada. Invention of the plow eased the intensive use of labor, and the innovation of mechanized farm equipment led to improved food production. It mainly occur in liquid and gaseous substance as their particle can easily move from one place to another. Accessibility StatementFor more information contact us [email protected] check out our status page at https://status.libretexts.org. Distinguish among hypotonic, hypertonic, and isotonic solutions. Imagine you're preparing a barbecue of grilled chicken and salad for friends. When deoxygenated blood is in your capillaries in your lungs, the oxygen in your lungs diffuses from a higher concentration in your lungs to the lower concentration in your blood. The cotransporter accomplishes this by physically coupling the transport of glucose to the movement of sodium ions down their concentration gradient. In an isotonic solution, the flow of water in and out of the cell is happening at the same rate. No tracking or performance measurement cookies were served with this page. Its tempting to simply make an argument based on stoichiometry: for every three ions of sodium that move out, only two ions of potassium move in, resulting in a more negative cell interior. 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? The township-and-range survey system was based on a geometric grid pattern, while the long-lot system was a rectilinear pattern based upon waterways or roads. 2.1: Osmosis - Biology LibreTexts 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). Can't that serve the same role? The material that diffuses could be a solid, liquid or gas. \dot{Q}_{\mathrm{H}}=500 \mathrm{kW}, \dot{Q}_{\mathrm{C}}=100 \mathrm{kW}} \\ {\text { b. } If the ECF is more concentrated than the cytosol, then the ECF is: A primary active transport process is one in which __________. Identify the polar and nonpolar regions of a cell membrane. When you've placed seven or more cards in the Don't know box, tap "retry" to try those cards again. (1967). Through the process of uniculturalism, multiple types of foods are blended together into one cuisine. Cytosol is composed of water and other molecules, including enzymes, which are proteins that speed up the cell's chemical reactions. Solutions of equal solute concentration are isotonic. Which of the following best explains the Green Revolution's highly variable level of success in increasing agricultu. Epinephrine diffuses through the plasma membrane; the hormone dimerizes in the cytosol. If a route such as a channel or carrier protein is open, sodium ions will move down their concentration gradient and return to the interior of the cell. His feet and legs were swollen with fluid. Even in large industrial reactions, when two liquids are mixed together, diffusion brings the reactants together and allows the reaction to proceed smoothly. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out. 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 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). 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? One of the main characteristics of . 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. What organelle degrades old, worn-out organelles and cell components? By what endocytosis process do some white blood cells engulf bacteria? 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. What transport process can create a concentration gradient for sodium across the plasma membrane? See our shouldn't it be positively charged? Osmosis | Biology Quiz - Quizizz Which of the following best explains the significance of a similarity among locations where olives, figs, grapes and lemons are grown? Which of the following is a characteristic of the cell membrane? Water is attracted to the compartment with a lower osmotic pressure. 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. D. Secondary active transport involves the movement of a substance into a cell with its concentration gradient. Which of the following best explains why tea plantations are common in Sri Lanka and tea exports are important to the country's economy? Plantation farming is considered to be an intensive farming practice because it requires large inputs of labor and capital to produce the crop. Which of the following is the best situation for maintaining homeostasis? A solution that contains fewer solutes than the cell is ________ to the cell. 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). 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. 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. This experiment was selected for Science at Home because it teaches NGSS Disciplinary Core Ideas, which have broad importance within or across multiple science or engineering disciplines. 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. The electrochemical gradients set up by primary active transport store energy, which can be released as the ions move back down their gradients. B. 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. does the glucose molecule just randomly attach itself to the protein when it's about to transport a sodium ion to the other side? Question 16 30 seconds Q. A vesicle fuses with the plasma membrane and releases its contents to the extracellular fluid. In biological systems, diffusion occurs at every moment, across membranes in every cell as well as through the body. A. For example, while oxygen gas will diffuse slightly more quickly than carbon dioxide, both of them will move more quickly than iodine gas. In this experiment, the food coloring that gets added is the same temperature in each of the hot and cold water tests. Passive processes that move substances across membranes ________. 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. As time progresses, the differential gradient of concentrations between high and low will drop (become increasingly . 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. molecules move through transport proteins that have been activated by ATP. She consumed a large amount of water in a short time (Don't try thiswater intoxication is often fatal.). Diffusion is a physical process that refers to the net movement of molecules from a region of high concentration to one of lower concentration. Diffusion helps in the movement of substances in and out of the cells. 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. 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. Have you ever colored a picture with marker and noticed that two touching colors begin to bleed together? When oxygen is moving towards tissues from capillaries, carbon dioxide is entering the bloodstream. At that concentration, the solution is isotonic to the cell. \end{aligned} 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). Why does the diffusion of the solute down its concentration gradient release energy? We are not permitting internet traffic to Byjus website from countries within European Union at this time. The cell membrane has pores that let only water and glucose into the cell and carbon dioxide out. Between 1950 and 1990, wheat production in India in average pounds per acre more than tripled, which allowed India to meet its populations need for food. In the context of the Second Agricultural Revolution, which of the following trends is represented in these images? However, the same phenomenon is not seen when immiscible liquids like petrol and water are mixed together. Which of the following best explains diffusion?Which of the following \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} If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. ADP is released as a by-product. The higher the temperature, the more kinetic energy the particles will have, so they will move and mix more quickly. 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. The material that diffuses could be a solid, liquid or gas. Which of these statements about diffusion of molecules is true? The sodium-potassium pump transports sodium out of and potassium into the cell in a repeating cycle of conformational (shape) changes. SDS, RDS, More Regulatory & Compliance Information, Lithium Battery UN 38.3 Test Summary Search, Transparency in Supply Chains and Modern Slavery Disclosures, Fill one glass half full of the coldest water you can get from the tap, Fill the other glass the same amount with the hottest water you can get from the tap. The images show devices developed during the Second Agricultural Revolution. Terms of Service. Simple diagram of a symporter (carrying two molecules in the same direction) and an antiporter (carrying two molecules in opposite directions). Not everything can make it into your cells. Large polar molecules cannot diffuse across a biological membrane B. Which of the following solutions will cause a red blood cell to shrink? selectively permeable: the characteristic of a membrane that allows some substances through but not others. Which of the following best explains diffusion? gradient? This type of transport is known as _____. 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. Although one of these refers to chemical properties and the latter social interaction, both are examples or diffusion. What separates the intracellular fluid from the extracellular fluid? Solved 1. Which of the following best explains how water - Chegg In facilitated diffusion, molecules only move with the aid of a protein in the membrane. to send you a reset link. Which of the following best explains the diffusion of plants and This occurs because there is a net movement of sugar molecules into the water medium. A. movement of molecules farther away from equilibrium B. exchange of nonpolar molecules for polar molecules C. movement of molecules from an area of high concentration to an area of low concentration D. movement of molecules from where there are fewer of them to where there are more

which of the following best explains diffusion? 2023