\end{aligned} Imagine you have a cup that has \(100 \: \text{mL}\) water, and you add \(15 \: \text{g}\) of table sugar to the water. Which one of the following processes can explain this? Here, the cell can't import glucose for free using diffusion, because the natural tendency of the glucose will be to diffuse. Some transport processes use transport proteins in the plasma membrane, but do not require ATP. It is the random motion of the molecules that causes them to move from an area of high concentration to an area with a lower concentration. Which of the following best explains why tea plantations are common in Sri Lanka and tea exports are important to the country's economy? Watch what happens to the food coloring. a.QH=500kW,QC=100kWb.QH=500kW,Wcycle=250kW,QC=200kWc.Wcycle=350kW,QC=150kWd.QH=500kW,QC=200kW\begin{array}{l}{\text { a. } Question 56. What type of membrane junction allows ions to pass directly from the cytoplasm of one cell to the cytoplasm of the adjacent cell? this monosaccharide yields the most energy of all macromolecules. Direct link to Yuya Fujikawa's post Hi, I'm just a little cur, Posted 5 years ago. 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. Solution A and solution B are separated by a semipermeable membrane. 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). How To Use Patchouli Oil For Erectile Dysfunction? Secondary active transport involves the movement of water by osmosis into a cell. Which of the following is the main component of the cell membrane? Use these flashcards to help memorize information. When they move in the same direction, the protein that transports them is called a. Which of these components add specialized functions to the plasma membrane? Which of the following best explains why farmers would plant both strawberries and watermelons in the same field? 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. Direct link to auzennesylvester92's post Are these pumps negativel, Posted 5 years ago. he Na+\mathrm{Na}^{+}Na+concentration of a solution was determined by measurement with a sodium ion-selective electrode. Which of the following best explains diffusion? Stirring increases the area of interaction between the two chemicals and allows these molecules to diffuse towards each other more quickly. 0 To produce a mRNA molecule to deliver the genetic instructions outside the nucleus. Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of higher concentration to an area of lower concentration. Identify the polar and nonpolar regions of a cell membrane. Would remain unchanged B. This results in crenation (shriveling) of the blood cell. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. Facilitated diffusion is necessary for the movement of large or polar molecules across the hydrophobic lipid bilayer. If you're seeing this message, it means we're having trouble loading external resources on our website. By the time blood flows into capillaries in the muscle or liver, for instance, there is only a single layer of cells separating this oxygen from hepatocytes or skeletal muscle fibers. A red blood cell will swell and undergo hemolysis (burst) when placed in a hypotonic solution. Small-scale farmers in Asia often lacked the resources necessary to acquire the hybrid seeds and the chemical inputs to grow them, leaving large gaps in the success of the Green Revolution outside of urban cores. Which of the following best explains diffusion? What is transported across a membrane during osmosis? 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. 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. 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. why wouldnt cells use atp for primary active transport of glucose directly, why go through a second step? Direct link to William H's post If for example there are , Posted 5 years ago. In fact, cells spend much of the energy they harvest in metabolism to keep their active transport processes running. All cells have a barrier around them that separates them from the environment and from other cells. Which of the following solutions will cause a red blood cell to shrink? This type of transport is known as _____. What will happen to a freshwater fish in the ocean? The high energy hot water model diffusion is important because its how we get oxygen to all the cells in our bodies. Hi, I'm just a little curious, why can't 3 potassium ions be pumped out and 2 sodium ions pumped in(the other way around)? Otherwise, tap the red Don't know box. 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. By diffusion: glucose will move from solution B to solution A. For instance, in the example about the diffusion of iodine gas, if the crucible is placed in another closed container and iodine crystals are heated for an extended period of time, the rate at which the purple gas seems to disappear at the mouth of the crucible will reduce. At equilibrium, movement of molecules does not stop. An example of this is the way the noxious smell of ammonia gas spreads in air. The plasma membrane is semipermeable, meaning that some things can enter the cell, and some things cannot. LEFT ARROW - move card to the Don't know pile. He should be given a hypotonic drip to draw fluid out of his cells. Large polar molecules cannot diffuse across a biological membrane B. This process requires some form of chemical energy. Cytosol is composed of water and other molecules, including enzymes, which are proteins that speed up the cell's chemical reactions. Which of the following is most likely to move through the cell membrane by facilitated diffusion? Biology Dictionary. Which of the following explains an impact of globalized agricultural commodity chains on consumers as compared to producers? For each of the following cases, determine whether the cycle operates reversibly, operates irreversibly, or is impossible. What happens when body cells are placed in a hypertonic solution? Can't that serve the same role? If you knew the answer, tap the green Know box. In most biological systems, diffusion occurs across a semi-permeable membrane made of a lipid bilayer. 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. At that concentration, the solution is isotonic to the cell. Which of the following is most likely to move through the cell membrane by facilitated diffusion? Philibert, J. (Show the details. Your email address is only used to allow you to reset your password. tonicity: the amount of solute in a solution. Which of the following is used to export large molecules from the cell? The tonicity of the IV fluid doesn't matterthe patient won't be in the operating room that long so any tonicity would be OK for a couple of hours. Water leaves the cells and the cells shrink. An open door is completely permeable to anything that wants to enter or exit through the door. 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) To move substances against a concentration or electrochemical gradient, a cell must use energy. What is required for its transport? A Diffusion provides encryption strength, while confusion provides data integrity B. Diffusion provides function integrity, while confusion provides encryption confidentiality. Which of the following best explains the economic advantage of the type of farm-produced goods shown in the images? A substance moves by facilitated diffusion into a cell. If a person goes to the hospital for surgery and requires IV (intravenous) fluids, which of the following should you expect? 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. In the case of a cell, positive and negative charges are separated by the barrier of the cell membrane, with the inside of the cell having extra negative charges relative to the outside. Adults should handle or assist with potentially harmful materials or sharp objects. What do you predict will happen to the person's cells? In this conformation, the pump no longer likes to bind to sodium ions (has a low affinity for them), so the three sodium ions are released outside the cell. 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. Which of the following best explains the process illustrated by the image? Secondary active transport involves the movement of a substance into a cell through a protein channel with its concentration gradient. The conversion from manual thread spinning to an industrial processing approach led to increased demand for raw cotton in the agricultural sector. Labor-intensive farming of vegetables is done in small-scale plots in market gardens, while extensive grain crops are grown in large-scale fields far from the market town. A. Which of the following best describes the settlement patterns shown in the images? If a person is severely dehydrated, their extracellular fluids will become hypertonic to the intracellular fluid. Similarly, the medium in which diffusion occurs could also be in one of the three physical states. Most lettuce is produced, processed, and packaged for sale in supermarkets that are a significant distance from where the product was grown. This property can be observed even better if the gas has an odor or color. Which of the following best describes the survey system used in both locations shown? Your email address is only used to allow you to reset your password. The long-lot system results in population clustered along a waterway, whereas the metes-and-bounds system results in a random, dispersed population pattern. 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 answer choices The English language initially diffused to North America through the process of relocation diffusion. Cells placed in a hypotonic solution will take in water across their membranes until both the external solution and the cytosol are isotonic. Not everything can make it into your cells. Direct link to Stocke's post Why does the diffusion of, Posted 7 years ago. Question 12 30 seconds Q. Plantation farming is considered to be an intensive farming practice because it requires large inputs of labor and capital to produce the crop. 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. By osmosis: water will move from solution A to solution B. Diffusion. Cells may lyse when placed into a hypertonic environment. You can also use your keyboard to move the cards as follows: If you are logged in to your account, this website will remember which cards you know and don't know so that they Which of the following statements most accurately compares these two agricultural practices? 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). Which of the following is NOT one of the functions of the cytoskeleton? Agricultural technology has increased the economy of scale and the carrying capacity of feedlots, increasing profits for the farmer. Direct link to long pham's post if there are more Potassi, Posted 6 years ago. Feedlots can minimize costs associated with livestock production because feedlots do not use as much space as cattle ranching. 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. & y_2^{\prime}=12 y_1 \\ For instance, a gas diffuses very quickly in another gas. This is related to both the mass of the molecule and its surface area. Which of the following best describes the impacts of the Second Agricultural Revolution? Why can't the Sodium move down it's concentration gradient by using the same channel the Potassium uses? Water moves into and out of cells by osmosis. Predict behavior of blood cells in different solution types. Muscle cells require an abundant amount of ATP to function. A. Channels are very selective and will accept only one type of molecule (or a few closely related molecules) for transport. Which of the following is a characteristic of the cell membrane? The images shown illustrate the differences in scale of production for two methods of producing thread. This is also seen when two liquid reactants are mixed with one another. Epinephrine binds to a cell-surface receptor; the activated receptor catalyzes the conversion of glycogen to glucose.

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