Nat K+ CI™ A™ ABCDE Assume the membrane becomes equally permeable to K+ and Cl, and is impermeable to all other solutes. The value of the membrane potential then become approximately A. 100 10 100 0 B. C. D. E. 10 100 10 100 0 mV 60 mV (inside negative) 60 mV (inside positive) 90 mV (inside negative) 90 mV (inside positive)
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- A characteristic of carrier molecules in a primary active transport pump is that: a. they cannot transport a substance and also hydrolyze ATP. b. they retain their same shape as they perform different roles. c. their primary role is to move negatively charged ions across membrances. d. they move Na+ into a neural cell and K+ out of the same cell. e. they act to establish an electrochemical gradient.Describe the contribution of each of the following to establishing and maintaining membrane potential: (a) the Na+K+ pump, (b) passive movement of K+ across the membrane, (c) passive movement of Na+ across the membrane, and (d) the large intracellular anions.2. Na+ K+ CI A™ The diagram below shows two electro-neutral solutions separated by a membrane. Other ions were omitted from the diagram. All concentrations are mM. A is a large impermeant anion. ABCDE A. B. C. D. OUT Assume the membrane becomes equally permeable to K+ and Cl-, and is impermeable to all other solutes. The value of the membrane potential then become approximately E. 100 10 100 0 IN 10 100 10 100 0 mV 60 mV (inside negative) 60 mV (inside positive) 90 mV (inside negative) 90 mV (inside positive)
- Calculate the equilibrium membrane potential for Na* for an extracellular fluid concentration of 138 mM and an intracellular fluid concentration of 16 mM. Bereken die ewewigsmembraan potensiaal vir Na* vir 'n ekstrasellulêrevloeistof konsentrasie van 138 mM en 'n intrasellulêre vloeistof konsentrasie van 16 mM. a. -90 mV. b. -84 mV. C. -72 mv. d. -63 mV. e. +57 mV.The determination of membrane permeability to a specific solute is broadly Fick's first law that is modified to account fo.. all of the aboe O membrane thickness O the solute's ability to dissolve in lipids O the electrical interaction between the solute and the membrane O the size of the solute relative to the membrane lipidsA Removing water is to osmosis A Adding water is to osmolarity B. Gated channels are to mediated transport B Lipid bilayers are to net flux. C.A 600 mOsm cell is to a 200 mOsm solution. (all nonpenetraing) C 53 molar (H₂0) cell is to a 54 molar (H2O) solution (all nonpenetraing) D Transporters are to simple diffusion. D Voltage-gated channels are to secondary active i transport A Removing water is to concentration A Adding solute is to dilution B. Heat energy is to diffusion B Transporters are to downhill gradients. CA 350 mOsm solution is to an 300 mOsm cell (all) nonpenetraing) C 550 mOsm.cell is to a 550 mOsm solution (all nonpenetraing) D: Channels are to facilitated diffusion D Aquaporins are to membrane potentials A: Adding solute is to molarity as: B: ATP is to active transport as: C: Hypertonicity is to cell size as: D: Pumps are to active transport as: Reser
- 1. Name the two forms of passive transport. 2. With reference to a named, specific example, describe the processes involved in channel mediated diffusion. In your answe state what kind of transport it is. 3. Explain why the graph obtained for facilitated diffusion when velocity of transport of a given molecule is plotted against its concentration is a hyperbola. In your answer, highlight the events that occur along the hyperbola.Under which circumstance is the Goldman equation equivalent to the Nernst equation? O when the cell membrane is only permeable to 1 ion O when the concentrations of the ions are equal outside and inside of the cell when the cell membrane is equally permeable to all ions O when there is no charge on the membrane8. Which of the following is not a feature of voltage-dependent ion channels? A. It has a hydrophobic transmembrane domain B. It is activated by a change in the membrane potential C. It is specific to the ion it lets through D. It is a passive transport E. It can be activated by the binding of a ligand
- 1. With reference to a named, specific example, describe the processes involved in channel mediated diffusion. In your answe state what kind of transport it is.1. For most neurons, the extracellular concentration of chloride ions (Cl-) is 108 mM, whilethe intracellular concentration of Cl- is 5 mM. a. If the plasma membrane becomes more permeable to Cl-, would there be Clinflux or Cl- efflux at an RMP of -70 mV? Why? Can this be explained step by step please and may I have the answers types thank you! (::Concerning the process of diffusion, at equilibriuma. the net movement of solutes stops.b. random molecular motion continues.c. there is an equal movement of solute in opposite directions.d. the concentration of solute is equal throughout the solution.e. All of these are correct