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? Question 16 30 seconds Q. Your cells have a plasma membrane that helps to guard your cells from unwanted intruders. 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. So the phospholipids are arranged in a double layer (a bilayer) to keep the cell separate from its environment. See our Solved Which of the following best explains the effect of - Chegg The use of improved plant hybrids and agricultural chemicals. All the examples given above were instances of simple diffusion. Typically, diffusion refers to the movement of molecules from high concentrations to lower concentrations. Everything in the cell sits in the cytosol, like fruit in a Jell-o mold. A. Golgi apparatus Facilitated diffusion is necessary for the biochemical processes of every cell since there is communication between various subcellular organelles. Solution A and solution B are separated by a semipermeable membrane. This page titled 8.4: Osmosis and Diffusion is shared under a CK-12 license and was authored, remixed, and/or curated by CK-12 Foundation. 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? 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. Which of the following is most likely to move through the cell membrane by facilitated diffusion? When they move in the same direction, the protein that transports them is called a. The images show examples of agricultural technology developed during different time periods. Which of the following best explains a negative economic consequence of the Green Revolution in less developed countries as compared to more developed countries? Which of the following statements most accurately compares these two agricultural practices? As a prokaryotic cell does not have a nucleus, the DNA is in the cytoplasm. Direct link to Samuel Mayer's post In an antiporter it uses , Posted 7 years ago. What is required for its transport? (2009). As a result of the EUs General Data Protection Regulation (GDPR). Primary and secondary active transport. These molecules diffuse freely in and out of the cell, along their concentration gradient. One of the most important pumps in animal cells is the, Not only does the sodium-potassium pump maintain correct concentrations of Na. Make sure to remember your password. While this could be facilitated by other molecules, it does not directly involve high-energy molecules such as adenosine triphosphate (ATP) or guanosine triphosphate (GTP). The pump is now back to where it was in step 1, and the cycle can begin again. In an isotonic solution, the flow of water in and out of the cell is happening at the same rate. 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. Which of the following best explains why in the model the amount of land used for dairying is much smaller than the pasture used for beef cattle? 60 seconds. The cell membrane has pores that let only water and glucose into the cell and carbon dioxide out. Why does the diffusion of the solute down its concentration gradient release energy? 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? The protein can be toggled back and forth between these forms by the addition or removal of a phosphate group, which is in turn controlled by the binding of the ions to be transported. Once again, as the concentration of this gas increases within the cell, it diffuses outwards towards capillaries where the force of flowing blood removes the excess gas from the tissue region. So something must protect the cell and allow it to survive in its water-based environment. If a person goes to the hospital for surgery and requires IV (intravenous) fluids, which of the following should you expect? The cell membrane allows only large molecules to diffuse into the cell. By osmosis: water will move from solution A to solution B. In this experiment, the food coloring that gets added is the same temperature in each of the hot and cold water tests. In most biological systems, diffusion occurs across a semi-permeable membrane made of a lipid bilayer. C. Secondary active transport occurs when the movement of one substance is coupled with the passive transport of a second substance. With the phosphate group gone, the pump will change back to its original form, opening towards the interior of the cell. This statement describes _____. As an example, let's suppose we have a high concentration of sodium ions in the extracellular space (thanks to the hard work of the sodium-potassium pump). Allison Soult, Ph.D. (Department of Chemistry, University of Kentucky). 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. 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. 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. Requested URL: byjus.com/biology/diffusion/, User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.5060.114 Safari/537.36 Edg/103.0.1264.62. The hypertonic solution has a lower water concentration than the hypotonic solution, so a concentration gradient of water now exists across the membrane. \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} Direct link to liweiong272's post Main difference: In facil, Posted 6 years ago. Which of the following best explains the potential impact of rising global temperatures on agricultural regions? 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. This results in crenation (shriveling) of the blood cell. Nerve cells do not have centrioles. If a cell is in a hypertonic solution, the solution has a . 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. This can occur with all sorts of matter, but is most commonly observed in liquids and gases. Which of the following best explains why farmers would plant both strawberries and watermelons in the same field? The kinetic energy of the molecules results in random motion, causing diffusion. Phosphorylation makes the pump change shape, re-orienting itself so it opens towards the extracellular space. To move substances against a concentration or electrochemical gradient, a cell must use energy. The gradient is steep enough that potassium ions will move out of the cell (via channels), despite a growing negative charge on the interior. If for example there are alot of sodium ions outside, their positive charges will repel and like atoms don't like being near eachother so they flow to the other side if there's a way to. 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. This is also seen when two liquid reactants are mixed with one another. Because a solute moving down its concentration gradient is spontaneous. When the roommate told the Emergency Department doctor what had happened, the doctor quickly began administering IV (intravenous) fluids. The image shows the movement of an insoluble molecule from the extracellular space towards the cytoplasm. Which of the following best explains the risks associated with pesticide applications? Na+. Sheep production in New Zealand and poultry production in Arkansas produce food animals for human consumption. A&P lecture 1 chp 3 Flashcards | Chegg.com Intensive agriculture is practiced in a Mediterranean climate. Each of these factors, independently and collectively can alter the rate and extent of diffusion. When oxygen is moving towards tissues from capillaries, carbon dioxide is entering the bloodstream. Agricultural settlement patterns are partly determined by the survey system used to organize landownership. Because diffusion happens from high concentration to low concentration, the more molecules are moving, the more opportunities they have to mix together. A vesicle fuses with the plasma membrane and releases its contents to the extracellular fluid. answer choices The English language initially diffused to North America through the process of relocation diffusion. What would happen if a cell dissolved in water, like sugar does? D. The SER stores calcium ions. At any given temperature, the diffusion of a smaller particle will be more rapid than that of a larger-sized molecule. The river in the long lot survey system provided better access to waterways to transport goods to market. The same gas would diffuse slightly more slowly in a liquid such as water and slowest in a solid. how does the carrier protein "harness" energy from another molecules concentration gradient? The two images represent different agricultural land survey patterns. Also, think about where you see this happen in other places. A. smooth endoplasmic reticulum Your email address is only used to allow you to reset your password. When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Secondary active transport involves the movement of a substance into a cell through a protein channel with its concentration gradient. i dont quite understand the secondary active transport. 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. The second sugar solution is hypertonic to the first. Which of the following substances must travel across a membrane via facilitated diffusion? For example, while oxygen gas will diffuse slightly more quickly than carbon dioxide, both of them will move more quickly than iodine gas. The end result is an equal concentration, or equilibrium, of molecules on both sides of the membrane. Direct link to tyersome's post Great question since pr, Posted 7 years ago. 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. _{15}^{\mathrm{a}} \mathrm{X} & \rightarrow \beta+^{32} \mathrm{b} \end{aligned} Therefore, muscle cells have numerous: Which statement regarding the smooth endoplasmic reticulum (SER) is false? 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. What process does water use to move across the plasma membrane? Can you find a safe way to heat or cool the food coloring before adding it to the water? Which of the following best explains the process illustrated by the image? Carbon dioxide is a small molecule that moves through the phospholipid bilayer with its concentration gradient by: Sodium ions are moving with their concentration gradient with the use of a protein channel across a plasma membrane. Diffusion is the process of movement of molecules under a concentration gradient. C. movement of molecules from an area of high concentration to an area of low concentration. & y_1^{\prime}=3 y_2 \\ Diffusion Definition & Meaning - Merriam-Webster Imagine you're preparing a barbecue of grilled chicken and salad for friends. In general, to maintain homeostasis the relationship between our intracellular and extracellular fluids should be which of the following? C. The SER manufactures proteins for export from the cell. Which of the following best explains the significance of similarities between the farming practices for apple orchards and grape vineyards?