Water Potential of Potato Cell Lab

Activity 3d - Osmosis in plant cells 1. Fill in the table below to indicate what happened to the elodea cells in each of the following solutions. Solution Hypertonic Isotonic Hypotonic Distilled water Activity 3e Osmosis in red blood cells 1. Summarize the results of the experiment in the table below. First, indicate what the tonicity (hypertonic, hypotonic or isotonic) of the solution is and then describe the appearance of the red blood cells. Solution 10% NaCl Will the cell membrane swell or shrivel? .9% NaCl What happens to the chloroplasts in the hypotonic solution? Why do you think that happens? Tonicity of the Solution Describe the appearance of the red blood cells 1. Saltwater fish live in an environment that is saltier than the inside of their cells. Explain which way water would move relative to the cells of their bodies (i.e. would water move in or out?).

TONICITY DRAG THE WORDS INTO THE BLANK SPACES BEL@W TO ACCURATELY COMPLETE THE PARAGRAPH Hypertonic Isotonic Hypotonic Hypertonic Lsotonic Hypotonic animal cell plant cell A Above are a represented plant cell and an animal cell. Refer to the key on slide 5 and fill in the blanks below. (If you find yourself counting solute dots, you're working much too hard!) Assume that the cell membranes are allow only water (not the solutes) to pass through. Because the cytoplasms of the plant and the animal cell have equal concentrations of solutes, we can say that their cytoplasms are to each other. If we put both the plant and the animal cells into Solution A, we would expect no change in the cells, because Solution A is to the cytoplasm of each cell.

Model 2 - Selectively Permeable Cell Membrane and Simple Diffusion Extracellular Fluid Wwwwww Cytoplasmic Fluid Extracellular Fluid www Cytoplasmic Fluid www w wwwwww www www.x www. www. www www www. ACTE Omw ww ww Type lions Type 2 molecules (glucose) Extracellular Fluid Wwwwwww Cytoplasmic Fluid Extracellular Fluid ww Cytoplasmic Fluid d wwwx w mo AM 8 MO m un www m 8 www www.x www. Summ Type 3 Urea molecules upe 4 oxygen molecules The four diagrams in Model 2 illustrate movement of four types of substances (see the table in Model 1 - the symbols in this model correspond with those from the previous model) across a phospholipid bilayer (extracellular fluid on left and cytoplasmic fluid on right). of 3. Label each diagram in Model 2 with the ion or molecule type (i.e., large/small, polar/nonpolar/charged) based on the information (including the symbols) in Model 1. 4. Assume the substances in Model 2 were on only one side of the membrane to start. The diagrams illustrate what would…

Membrane Protein Insertion in the ER This figure displays five small hypothetical proteins. The a-helix secondary structure of the protein is bracketed and the number of amino acids in the helix is indicated. If the hypothetical ER localization sequence is green-yellow-yellow-green-yellow-red, what protein could potentially be a transmembrane protein in the plasma membrane? = Acidic = Basic = Polar (uncharged) O = Hydrophobic CO₂ T 20 CO2 T 20 NH₂ A. T 20 NH₂ B. NH₂ C. T 20 NH₂ D. NH₂ E. tot 10

Active transport,osmosis, endocytosis, exocytosis,facilitated,diffusion

dentify the structure labeled A (thick line) I Choose | (Choose dentify the structure labeledB Cell membrane dentify the structure labeledC Cell wall Nucleus Jentify the structure labeled D (thin line belween the whiteeand purple) yloplasm

Part C - Facilitated diffusion via channels and carrier proteins The majority of solutes that diffuse across the plasma membrane cannot move directly through the lipid bilayer. The passive movement of such solutes (down their concentration gradients without the input of cellular energy) requires the presence of specific transport proteins, either channels or carrier proteins. Diffusion through a transport protein in the plasma membrane is called facilitated diffusion. outside cell channel protein inside cell carrier protein' Adapted from Biology by Campbell and Reece ©2008 Pearson Education, Inc. Sort the phrases into the appropriate bins depending on whether they are true only for channels, true only for carrier proteins, or true for both channels and carriers. ▸ View Available Hint(s) only channels transport primarily small polar organic molecules provide a continuous path across the membrane provide a hydrophilic path across the membrane allow water molecules and small ions to flow…

TONICITY DRAG THE WORDS INTO THE BLANK SPACES BELOW TO ACCURATELY COMPLETE THE PARAGRAPH Hypotonic Osmosis water Swell Cell wall animal cell plant cell Facilitated Stay the same Hypertonic Diffusion Isotonic Shrink A Let's put both cells into Solution B. Because Solution B is hypertonic to the cytoplasms of the cells, we would expect water to the cells through the process of This would result in the cytoplasm of both cells shrinking. Now we'll put both the plant and the animal cell into Solution C, which, because it contains no solutes at all, is to the cytoplasm of both cells. will enter both cells through osmosis. The animal cell is likely to unfortunately. The plant cell, however, is protected from this because of the presence of its which is lacking in the animal cell.

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this question from bioengineering  asap

Please see the picture below

t be submitted on one attempt auto-submit when time expires bondus password is 515b73158335f6 Question 6 Which ion is actively transported through the cell membrane and why? O Na, because the ion is being moved against its gradient O Mg, because the membrane is impermeable to this ion OK, because the ion is being moved with its gradient O Cl, because the ion is moved to equilibrium < Previous

Transport Across the Cell Membrane Worksheet 1. For each of the following examples, state whether the solution is isotonic, hypertonic or hypotonic and draw an arrow to indicate which way water will move. a) b) 100% H₂O 10% NaCl 0% NaCl 90% H₂O 83 5% salt 10% salt

Tonicity3 := Homework • Unanswered Suppose the circle represents a cell which is sitting in a solution. Compare the concentration inside the cell with the concentration of the surrounding solution to determine the tonicity of each. 1% sugar 10% sugar Drag and drop options on the right-hand side and submit. For keyboard navigation... SHOW MORE v The solution is... into/out of the cell at equal rates. The cell is... isotonic out of the cell. Water will move... hypertonic hypotonic into the cell. II II II II II

Determining Turgor Pressure in a Plant Cell in Sucrose | 1 of 1 Moderate Previous Next Many cells face serious difficulty living in a hypotonic environment and adapt in various ways to prevent cytolysis due to excessive water movement. Plant cell walls are one such adaptation to osmosis. By applying pressure in the form of turgor pressure on the inside of the wall, plants can prevent further movement into the plant and thus avoid cytolysis. A particular plant cell is placed in an open container of water containing a 0.75 M solution of sucrose at 20°C. Calculate the turgor pressure required to allow the plant to be at equilibrium with the environment and prevent water entry into the plant cell.

Properties of Water & Membrane Function Dr. Isley (a.k.a. Poison Ivy) is teaching a master class on botany. Explain to her the following concepts so that she will keep her promise to release Batman and Robin from captivity! Part 1: Plants absorb water through special cells in their roots. For the water to enter the root cells, does the water need to be hypertonic, hypotonic, or isotonic to the inside of the cell? Briefly explain your reasoning? Part 2: Based on your answer in Part 1, would there be more hydration shells in the extracellular (surrounding) water or inside of the root cells? (one word answer) Part 3: First, explain why water is a polar molecule. Then, discuss how the polar nature of water allows it to form hydrogen bonds with other polar molecules and how this relates to the ability for water to form hydration shells.

Example Problem: FRAP Data Interpretation The diffusion rate of four different membrane proteins (A, B, C, and D) was measured using a FRAP experiment with purified liposomes. The FRAP recovery curves are shown below. Fluorescence intensity ROI A 3 Time B Time Post-bleaching imaging с Time D Time Pre-bleaching Bleaching imaging imaging (a) Which membrane protein exhibits the higher rate of diffusion in the lipid bilayer? A or B? C or D? (b) Explain the most likely cause of the difference in the recovery curves for proteins A and C.

Cold HOT Effect of Temperature on the Rate of Diffusion Solutes move within a cell's cytoplasm largely because of diffusion. However, the rate of diffusion is affected by such factors as temperature and the size of the solute molecule. Observe the effect of different temperatures on the rate of diffusion by watching the video above. Temperature Homework • Unanswered At which temperature did solutes dissolve the fastest? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a At hot temperatures E Fullscreen b At cold temperatures

Membrane Physiology Homework 1. You have a beaker filled with a solution containing 2M glucose, 4M urea and IM salt. Suspended in the solution is a cell that containing a solution of IM glucose, 8M urea and 3M salt. The membrane of the cell is permeable to glucose and salt but not urea. Answer each of the following questions: a. Where will water move? b. Where will urea move? c. Where will glucose move? d. Where will salt move? e. What will happen to the volume of fluid inside the cell? f. What will happen to the osmolarity of the fluid inside the cell?

CELL STRUCTURE AND FUNCTION – EUKARYOTES, PROKARYOTES AND VIRUSES-LABORATORY REPORT SHEET  ACTIVITY 2: CELL MEMBRANES, OSMOSIS AND DIFFUSION         Initial Volume (Vi) (mL) Final Volume (Vf) (mL) Change in Volume (Vi – Vf) (mL) A 20% sucrose 20% sucrose 92.0 mL 94.0 mL -2.0 mL B 40% sucrose 20% sucrose 92.0 mL 92.0 mL 0.0 mL C 20% sucrose 40% sucrose 92.0 mL 90.0 mL 2.0 mL   Treatment Percent Change A -2% B 0% C 2%   Hypothesize which dialysis bags should gain, lose or stay the same in regards to volume. Explain. Which solution is hypotonic, hypertonic and isotonic? Explain what the change in volume of the dialysis tube indicated and describe what happened when the volume increased and when the volume decreased. Explain the relationship between solute concentration and amount of free water or water available for movement.

ABOUT TRANSPORT MECHANISMNO NEED TO EXPLAIN EACH ITEMS *YOU MUST ANSWER (1)-(27) *JUST FILL IN THE BLANKS THANK YOU IN ADVANCE.

1:58 l 5GE Done 11 of 23 3 of 12 During an investigation on membrane transport, a researcher exposed bacterial cells to different concentrations of two different solutes: A and B. The rate of transport of each solute into cells is represented in the graph. = Solute A = Solute B Solute Concentration Which of the following best explains the greater rate of transport for solute A than for solute B at higher solute concentrations? Solute A is being transported by simple diffusion, which does not rely on membrane proteins to control the rate of transport. A Solute A is being transported by active transport, which uses ATP and has higher rates of transport than passive transport. B Solute A is being transported by facilitated diffusion, which uses membrane proteins to increase the rate of transport. Submit !! Rate of Transport II

Model 4 - Transport Proteins: Facilitated Diffusion Extracellular Fluid mu Cytoplasmic Fluid Extracellular Fluid wwwwwwy hmmmml Cytoplasmic Fluid www.wmy wwwwwy hummu hmm wwwwwwy immmml wwwwwwwwY immu hmmmml wwwwy hmmmm O wwwwwwy wwwwwwwy imm hmmmmm Y www Y www 10. What appears to be the effect of inserting a protein channel into the membrane on the movement of molecules across the membrane? 11. Is the inner surface (facing the channel) of the embedded protein likely to be polar or nonpolar in the examples shown in Model 4? Is the exterior surface (facing the fatty acid chains of the phospholipids) of the embedded protein likely to be polar or nonpolar? Explain your reasoning. When a membrane protein assists in the passive transport of molecules across a barrier in the direction down their concentration gradient (from high concentration to low concentration) it is called facilitated diffusion. Transport proteins may also be involved in active transport where the cell uses energy from…

Can you help me answer the A & B?

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Give 4 similarities and 4 differences between and nature and/or role of membrane potentials in a neuron and in a mitochondrion.

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