Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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- The following table shows experimental results of the glucose transport rate, mM/sec, following facilitated diffusion by glucose carrier proteins. (Recall: the starting conc. L represents glucose added to one side of the membrane; distilled water, omM of glucose was added to the other side of the membrane). The rate of glucose transport was 0.0031 mm/sec with 8mM of glucose (run number 4, highlighted); the rate decreased to 0.0017 mM/sec with 10mM of glucose (run 5, highlighted). Why was the rate of glucose transport slower when the concentration gradient was increased? Experiment Results Run Number Solute 1 1 2 2 3 33 4 4 5 6 6 Na Ch Glucose Na Ch Glucose Na Ch Glucose Nat Ch Glucose Na Ch Glucose Nat Cl Glucose Start Conc. L Start Conc. R (MM) (mM) 0.00 0.00 2.00 0.00 0.00 0.00 8.00 0.00 0.00 0.00 2.00 0.00 0.00 0.00 8.00 0.00 0.00 0.00 10.00 0.00 2.00 0.00 2.00 0.00 Carriers 500 500 500 500 700 700 700 700 100 100 700 700 Rate (mm/sec) 0.0000 0.0008 0.0000 0.0023 0.0000 0.0010…arrow_forward19. 150 mCi of D2O is injected in your patient. 10% of D2O is excreted. The concentration of D2O in a plasma sample is found to be 0.4 mCi/100 ml. What is your patient' s Total Body Water in L? 20. the diffusion coefficient states that: A. the larger the molecular radius of the solute, the slower the rate of diffusion B. the more viscous the solution, the slower the rate of diffusion C. the smaller the molecular radius of the solute, the faster the rate of diffusion D. the more viscous the solution, the faster the rate of diffusion E. the larger the molecular radius of the solute, the faster the rate of diffusion 21 You are experimenting on diffusion rates in lab. Down the center of Beaker A is a semipermeable membrane. On one side of the membrane in Beaker A is a 100mM solution of CaCl2; on the other side is pure water.Down the center of Beaker B is a semipermeable membrane. On one side of the membrane in Beaker B is a 10mM solution…arrow_forward4) Two membrane preparations have been made from the plasma membrane of erythrocytes (i.e red blood cells) and are being maintained in an isotonic buffer solution: (1) right-side-out membrane vesicles, in which the exoplasmic leaflet of the vesicle faces the buffer (equivalent in orientation to that of the exoplasmic leaflet of the intact plasma membrane); and (2) inside-out membrane vesicles in which the exoplasmic leaflet faces the interior of the vesicles and the cytoplasmic leaflet faces the buffer. 80 a. Right-side-out vesicles (ROVS) Very Low Fluorescence Inside-out vesicles (IOVS) Very High Fluorescence A newly discovered phosphoglyceride, called phosphotidylalanine is currently being studied. Annexin V is a protein that binds to phosphatidylalanine, which is one of the phospholipids present in the cell membrane preparations described above. Fluorescently labeled Annexin V is mixed with each vesicle preparation. The vesicles are washed to remove unbound Annexin V and then…arrow_forward
- uring dialysis, a semi-permeable membrane with a molecular weight cutoff of 10,000 is used. Select the true statements from the list below (more than one answer could apply) Group of answer choices A monoclonal antibody with a 150 kDa MW is retained and does not diffuse across the membrane A small enzyme with 20 kDa MW diffuses readily across the membrane Buffer salts with molecular weights ranging between 100 and 500 Da diffuse across the membrane until equilibrium (equal concentration) is reached on both sides of the membrane None of the above statements are correct Please answer asaparrow_forwardAnswer the following questions about the resting membrane potential of cells (in other words, the electrochemical gradient of a cell at rest). 1. In regards to Na+ and K+, what is the ionic gradient of these ions across the plasma membrane? 2. What is the electrical charge just inside the plasma membrane and just outside the plasma membrane of a cell at rest? 3. What maintains this electrochemical gradient?arrow_forwardA solution that is described by the term hypertonic means that it isarrow_forward
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