07 Lab 5 Movement of Molecules

Unit 2: Cells Test Review Cell Transport Label the following pictures: active transport, passive osmosis, passive diffusion, or passive facilitated diffusion. We o Why does Active Transport require ATP energy? What is your vocabulary word that means balance/ equillibrlum? Solutions 1. Label the below images of solutions: hypertonic, hypOtonic, or isotonic. 2. Write if the cell will be at equilibrium, shrink, or swell. 3. Explain where the most water is (inside the cell or outside the cell). 4. Explain where most of the water will move (inside the cell or outside the cell). Water O Water Water Water o O Water Water O Solute O Solute O Solute Explain if water will fNow into or out of the cell in the following scenarios: 1. Salt is 30% inside the cell and 35% outside the cell. • Water is % inside the cell % outside the cell • Waler will flow [inside /outsidel so the cell can reach equilibrium.

Multiple Choice The apparatus shown was set up. Some hours later, the water in the beaker had turned blue, and the liquid in the glass tube had moved upwards. Which processes caused these changes? 2 attachments glass tube Which processes caused these changes? water turned blue liquid in glass tube moved upwards sugar solution and blue ink pure water A osmosis diffusion partially permeable membrane active transport osmosis diffusion active transport diffusion osmosis A B D

8. Define homeostasis. maintoining nterral balance 9. What role does the cell membrane play in maintaining homeostasis? 10. How is facilitated diffusion different from diffusion? How are they similar? 11. List two ways that active transport is different than passive transport. 1) 2) 12. Why is the sodium-potassium pump considered an active transport? Which direction are the sodium and potassium bing pumped? How many sodiums are being pumped? How many potassiums are being pumped?

Part I – Introduction to Diffusion and Osmosis1. Define the terms diffusion, passive transport, active transport, and osmosis. In each of your definitions, describe the role of a concentration gradient. 2. Biological membranes are said to be selectively permeable (or semi-permeable). What does this term mean, and how does this affect the way that molecules are able to move through cellular membranes? 3. Which type of molecule is more likely to quickly pass through a cellular membrane via simple diffusion, polar or nonpolar? Why? (You may need to use information from your textbook and class discussions to answer this question.)

Students set up an experiment in which they filled dialysis tubing with a 3% starch solution. They tied off the ends of the tubing and placed it in a beaker filled with distilled water and 1% iodine for 3 hours as shown in the diagram. 3% starch solution 1% lodine solution Since dialysis tubing is semi-permeable like the plasma membrane, the bag of white starch solution was bluish- black the next day. What is the best explanation for the results? (1D) O The starch solution diffused into the beaker because the concentration of water is greater in the starch solution than in the iodine solution. The iodine solution diffused into the bag because the concentration of water is greater in the starch solution than in the iodine solution. O The lodine solution diffused into the bag because the concentration of water is greater in the iodine solution than in the starch solution. O The starch solution diffused into the beaker because the concentration of water is greater in the iodine solution…

i have 4 homework questions related to cell transport. i answered them with the help of my notes but just wanted to verify if my answers are correct and if they are not then an explanation would be helpful. so can you confirm if the following bolded answers are correctly selected:  1. Two molecules that can pass easily through the plasma membrane, between phospholipids, include a) oxygen and starch b) salt and water c) starch and salt  d) water and oxygen e) starch and water 2. When comparing two solutions, the one with more dissolved solutes is said to be a) hypotonic b) hypertonic c) isotonic d) in equilibrium 3. Turgor pressure builds up in a(n)_________ cell when it is placed in a(n)_______ solution. a) plant, hypotonic b) plant, hypertonic  c) plant or animal, isotonic  d) animal, hypotonic e) animal, hypertonic 4. The scent of a burning candle fills the entire room.  This process is an example of a) osmosis b) diffusion c) endocytosis d) facilitated diffusion e) none of the above

11:28 PM Fri Oct 9 * 29% O T of + : Oct 8, 2020 at 2:10 PM NAME DATE PERIOD Cell Membrane Discovery Big Idea: Cells move materials in and out of their environment through the cell membrane in order to maintain (balance) or (equal state). Composition of the Cell Membrane & Functions: The cell membrane is also called the membrane and is made of a phospholipid The phospholipids have a (water attracting or polar) head and two (water repelling or non-polar) The head of a phospholipid is made of an alcohol and phosphate group, while the tails are 2 chains of fatty acids. Phospholipids can move apart and allow water and other molecules to pass through into or out of the cell. This is known as simple because it does not require and the molecules are moving from areas of concentration to an area of concentration. 1. LABEL a phospholipid bilayer coloring the heads red and the tails blue. 2. LABEL the structure that is hydrophobic and hydrophilic. PHOSPHOLIPID molecule membrane Another type of…

Which of the following factors would tend to increase membrane fluidity?  A greater proportion of unsaturated phospholipids  A relatively high protein content in the membrane A greater proportion of saturated phospholipids A lower temperature

What is unique about plasma membrane?   Why is it advantageous for the plasma membrane to be fluid in nature?   How does the sodium-potassium pump contribute to the net negative charge of the interior of the cell?   In medicine, why is it important to administer only isotonic intravenous solutions to patients? Example of isotonic IV fluids are normal saline and lactated Ringer’s solution.   Potassium is a necessary nutrient in order to maintain the function of our cells. What would occur to a person that is deficient in potassium?

Zarchi Hlaing: Attempt 1 Previous Page Next Page Question 17 (1 point) Match each membrane molecule with its corresponding description. [Each choice will be used exactly once.] Can serve as transport channels. Help animal cell membranes maintain 1. Phospholipids fluidity. 2. Carbohydrates Combine with other molecules to make cell 3. Proteins surface markers that identify self from non-self. 4. Cholesterol Lipid that can be described as saturated or unsaturated. Time Left:1:10:51

The fluidity of the plasma membrane increases with 1.Increase in unsaturated fatty acids in the membrane 2.Increase in saturated fatty acids in the membrane 3.Increase in glycolipid content in the membrane 4.Increase in phospholipid content in the membrane

Reset Help up During osmosis, water moves higher its concentration gradient. active Diffusion is the movement of solutes from an area of concentration to an area lower of concentration. passive down Osmosis is the movement of a solvent from an area of concentration to an area of concentration across a selectively permeable membrane Diffusion and osmosis are processes.

3:35 ::!! LTE O A grier.instructure.com 缩放 + Name: Cell Transport Graphic Organizer Cell Transport passive involver Complete the map using the following words: diffusion | equilibrium | osmosis | phospholipids | cell membrane endocytosis | exocytosis | low concentration | energy

%09 l, dO" NOA Please answer the following statements with true or false True False Peripheral proteins interact with water and with the phosphate heads of the plasma membrane A red blood cell placed in hypotonic solution would undergo plasmolysis Waste can be released from the human cell by exocytosis Calcium can enter the cell by simple diffusion Phospholipids bilayer is a barrier against ions Water can diffuse across the plasma A membrane using aquaporins

What would happen to an animal cell if you immersed it in a hypertonic solution for an extended period of time?   Question options:   Excess water is taken up by the central vacuole, causing the cell to swell, but not burst.   The cell would shrivel and appear crenate.   Nothing would happen, the system is in equilibrium.   The cell would swell until it burst.

You are viewing two samples of mammalian red blood cells (erythrocytes) under a microscope. One first sample is made up of cells with a typical round shape. Most of the cells in the second sample had burst open. •Describe the properties of the solution that was used to prepare the second sample. • Identify one type of solute that can move through simple diffusion and does not affect osmotic pressure or require a membrane protein to cross a plasma membrane.

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…

The topic is Plasma Membrane: Supply necessary information about the parts of the plasma membrane in one sentence each. 1. Glycoprotein 2. Globular protein 3. Carbohydrate 4. Glycolipid 5. Cholesterol 6. Alpha-helix protein 7. Channel protein 8. Peripheral protein 9. Integral protein.

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…

Osmosis Practice Activity Osmosis is the diffusion of water from an area of high concentration to an area of low concentration. Only water moves in osmosis! The diagrams below show the concentration of water and salt inside the cell and the concentration of water and salt surrounding the cell. Complete the sentences below by comparing the concentration of the water inside the cell and the concentration outside the cell. 1. a. Water will flow the cell, out of the cell, in both directions). (into 5% NaCl 95% H20 95% NaCI 5% H20 b. The cell will (shrink, burst, stay the same). a. Water will flow (into the cell. 2. 5% NaCl out of the cell, in both directions). 5% NaCl 95% H20 95% H20 b. The cell will (shrink, burst, stay the same).

What among the following describes osmosis 1. The diffusion of water from an area low solute concentration to an area of high solute concentration. 2. Osmotic pressure is the force that allows water to move by osmosis through a selectively permeable membrane 3. When a cell is immersed in a hypertonic solution, water enters the cell by osmosis which causes it to swell and eventually burst. 4. A solution with greater concentration of water and low concentratioj of solute isbtermed as hyposmotic

CELL ENVIRONMENTS Fill in the following statement: Diffusion is the movement of molecules from_high_concentration to_low. concentration. is the diffusion of water. BEAKER #I The solution inside the beaker is: % water % salt The solution inside the cell is: 90 10 % water % salt 20% salt How will the water move? Into the cell or out of the cell? 10% salt How will the movement of water affect the cell? The cell O Water molecules This is a(n) solution.

35: Which of the following statements makes it necessary for animal cells, although they have no cell walls, to have intercellular junctions? Cell-to-cell communication requires physical attachment of one cell to another.   Maintenance of connective tissue shape requires cells to adhere to one another.   Cell membranes do not distinguish the types of ions and molecules passing through them.   Large molecules, especially proteins, do not readily get through one, much less two adjacent cell membranes.   21: Living things are made up of cells. Cells are organized at different levels to form very complex living organisms like your body. Each level has a specific role or job to perform. Which of the following correctly describes the order of organization from the simplest to the most complex?     tissues, cells, organs, organisms, organ systems   cells, tissues, organs, organ systems, organisms   organs, organ systems, organisms, cells, tissues   organisms,…

Eukaryotic membrane fluidity can be increased by which of the following mechanisms? cell bio increasing the number of carbons in the fatty acids of membrane lipids increasing the number of fatty acids attached to glycerol in membrane lipids increasing the number of straight-chain fatty acids of membrane lipids increasing the degree of unsaturation in the fatty acids of membrane lipids increasing the number of membraned organelles in the eukaryotic cell

Jubutunce, TUr example, how the When molecules move from areas of high concentration to areas of low concentration Label the diagrams of cells using the following terms: diffusion, active transport, osmosis, facilitated diffusion, or equilibrium. The arrows show the direction of transport. You may use the terms more than once! High CO2 levels 8 H20 molecules 25 glucose molecules 2 H20 molecules Low CO2 levels 5 glucose molecules 2 H20 molecules High protein levels 10 H20 molecules 10 H2O molecules Low protein levels 8 H20 molecules Osmosis Practice Activity he diffusion of water from an area of high concentration to an area of low concentration. ences below helow show the concentration of water and salt inside

What is the cause of the impermeability of plasma membranes to water-soluble molecules?  Group of answer choices   the nonpolar nature of water presence of phospholipid bilayer with a nonpolar/hydrophobic interior region presence of transmembrane proteins the presence of cellulose

Cell Transport Concept Map requires Word Bank: Active Transport Passive Transport Diffusion Against the concentration gradient (low to high) small molecules move through examples Example: in Facilitated Diffusion ATP Energy Glucose/Amino Acids/Ions Wastes/Secretions Cell transport involves the exchange of molecules through the large molecules transported by out Example: Cell Membrane (2X) Osmosis Food/Bacteria Endocytosis Exocytosis Down the concentration gradient (high to low) Small molecules move through Proteins (2X) moved by Larger molecules move through also called of water