Homework Answers
a) active ion transport
passive transport of ion is concentration depends transport where ions are transported from higher concentration to lower concentration so passive transport would not occur when concentration of that particular ion is same at both side. Whereas active transport does not depends on the concentration, the transport of ion in this case is from lower to higher concentration, and active transport can occur even if there is equilibrium of concentration of that ion.
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12. In a cell, the difference in ion concentration between the intracellular and extracellular fluids results...
11. For a hormone to elicit a specific response from a cell, the cell must possess...
11. For a hormone to elicit a specific response from a cell, the cell must possess a. a synapse. b. a cell body. c. dendrites specific to the hormone. d. receptor proteins specific to the hormone. 12. In a cell, the difference in ion concentration between the intracellular and extracellular fluids results from a. active ion transport. b. passive diffusion of ions. c. bulk movements of intracellular and extracellular fluids. d. both active ion transport and passive diffusion of ions.
15. Given the following concentrations of ions in the intracellular and extracellular fluids of a cell;...
15. Given the following concentrations of ions in the intracellular and extracellular fluids of a cell; inside the cell: Na+ 12mM. K+ 150mM, CI-9mm, Ca2+0.0001mM and outside the cell: Na+ 145mM, K+ 5mM, CI- 125mM, and Ca2+ 2.5mM. Calculate the equilibrium potential for K+ (Ek) if its extracellular concentrations rise from 5 mM to 10 mM. Use the Nernst equation and the ion concentration to perform the following calculation. Comparing this to the normal Ek, is the change a depolarization...
Although the extracellular environment has a high sodium ion concentration and the intracellular environment has a...
Although the extracellular environment has a high sodium ion concentration and the intracellular environment has a high potassium ion concentration, both must be neutralized by negatively charged molecules. In the intracellular case, what is the principal anion? Group of answer choices organic anions chloride ion lipids hydrogen ions
1.) If the intracellular chloride ion concentration of a cell is 9 mM and has an...
1.) If the intracellular chloride ion concentration of a cell is 9 mM and has an extracellular concentration of 125 mM, then the equilibrium potential for chloride ion is ___ mV. (round to the nearest 10th decimal place) 2.) Typically found at the apical surface of an epithelial layer, a __ __ serves to prevent/limit paracellular transport as well as sealing and providing support to the epithelium. 3.) In order for a cell to respond to a regulatory molecule, it...
For a typical mammalian cell, the intracellular and extracellular concentrations of the chloride ion, Cl", are...
For a typical mammalian cell, the intracellular and extracellular concentrations of the chloride ion, Cl", are 4 mM and 150 mM, respectively. For the calcium ion, Ca2+, the intracellular and extracellular concentrations are 0.2 p.M and 1.8 mm, respectively. What are the equilibrium potentials in millivolts, mV, for each ion at 37 °C? . Veg for CI= V for Ca2+ SS
The ratio between extracellular and intracellular K+ concentration A) will cause depolarisation of resting membrane potential...
The ratio between extracellular and intracellular K+ concentration A) will cause depolarisation of resting membrane potential if extracellular K+ concentration decreases B) has little effect on neuronal resting membrane potential C) is the main factor controlling neuronal resting membrane potential D) is able to vary freely in brain tissue E) will cause hyperpolarisation of resting membrane potential if intracellular K+ concentration increases Please explain the answer! Thankyou :)
For a substance crossing a cell membrane, the chemical driving force Select one: a. depends only...
For a substance crossing a cell membrane, the chemical driving force Select one: a. depends only on the concentration gradient if the substance is uncharged, but also depends on the electrical force if the substance is an ion. b. is the force that pushes molecules across the membrane, but only if the substance is actively transported. c. depends only on the concentration gradient, regardless of whether or not the substance is an ion d. is the total driving force on...
By itself, _______________ would increase the rate of diffusion of sodium ions into a cell. Group...
By itself, _______________ would increase the rate of diffusion of sodium ions into a cell. Group of answer choices A) a decrease in extracellular osmolarity B) an increase in the intracellular concentration of potassium ions C) a decrease in the permeability of the membrane to sodium ions D) Two of the answers are correct. E) an increase in the extracellular concentration of sodium ions
Please summarize this chapter typed clearly. Diffusion Is a passive process of transport. A single substance...
Please summarize this chapter
typed clearly.
Diffusion Is a passive process of transport. A single substance tends to move from an area of high concentration to an area of low concentration until the concentration is equal across a space. Facilitated transport Facilitated diffusion is the process of spontaneous passive transport of molecules or ions across a biological membrane via specific transmembrane integral proteins. Channels The integral proteins involved in facilitated transport are collectively referred to as transport proteins, and they...
B3. Cell Membrane and Cell Transport a) What kind of solution should a cell be placed...
B3. Cell Membrane and Cell Transport a) What kind of solution should a cell be placed in for it to become lysed? [1 mark] b) Give an example of a transmembrane protein. [1 mark] c) Which form of membrane transport does NOT require the expenditure of energy by the cell? [1 Mark] d) Given a cell with concentration of solutes in the environment lesser than the concentration of solutes in the surrounding fluid.. i. the extracellular fluid is said to...
11. For a hormone to elicit a specific response from a cell, the cell must possess a. a synapse. b. a cell body. c. dendrites specific to the hormone. d. receptor proteins specific to the hormone. 12. In a cell, the difference in ion concentration between the intracellular and extracellular fluids results from a. active ion transport. b. passive diffusion of ions. c. bulk movements of intracellular and extracellular fluids. d. both active ion transport and passive diffusion of ions.
15. Given the following concentrations of ions in the intracellular and extracellular fluids of a cell; inside the cell: Na+ 12mM. K+ 150mM, CI-9mm, Ca2+0.0001mM and outside the cell: Na+ 145mM, K+ 5mM, CI- 125mM, and Ca2+ 2.5mM. Calculate the equilibrium potential for K+ (Ek) if its extracellular concentrations rise from 5 mM to 10 mM. Use the Nernst equation and the ion concentration to perform the following calculation. Comparing this to the normal Ek, is the change a depolarization...
For a typical mammalian cell, the intracellular and extracellular concentrations of the chloride ion, Cl", are 4 mM and 150 mM, respectively. For the calcium ion, Ca2+, the intracellular and extracellular concentrations are 0.2 p.M and 1.8 mm, respectively. What are the equilibrium potentials in millivolts, mV, for each ion at 37 °C? . Veg for CI= V for Ca2+ SS
Please summarize this chapter
typed clearly.
Diffusion Is a passive process of transport. A single substance tends to move from an area of high concentration to an area of low concentration until the concentration is equal across a space. Facilitated transport Facilitated diffusion is the process of spontaneous passive transport of molecules or ions across a biological membrane via specific transmembrane integral proteins. Channels The integral proteins involved in facilitated transport are collectively referred to as transport proteins, and they...
B3. Cell Membrane and Cell Transport a) What kind of solution should a cell be placed in for it to become lysed? [1 mark] b) Give an example of a transmembrane protein. [1 mark] c) Which form of membrane transport does NOT require the expenditure of energy by the cell? [1 Mark] d) Given a cell with concentration of solutes in the environment lesser than the concentration of solutes in the surrounding fluid.. i. the extracellular fluid is said to...
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