A cell biologist interested in the transport of calcium ions (Ca2+) across the plasma membrane of...
A cell biologist interested in the transport of calcium ions (Ca2+) across the plasma membrane of bacterial cells made the following measurements on bacterial cells at 25°C: Vm = -150 mV [Ca2+] outside = 20 mM [C a2+] inside = 0.4 mM Constants: R = 1.987 cal/mol degree; T = Temperature in Kelvin (273+ °C) , F=23062 cal/mol volt, z=charge of the molecule, Vm =membrane potential in V. Note: ∆Ginwards = +RTln([in]/[out]) + zFVm
94. What is the free energy change for the inward movement of calcium ions into the bacterial cell?
B) -9.235 kcal/mol; an exergonic reaction - I get this value when using -0.15
D) -4.602 kcal/mol; an exergonic reaction - I see people getting this value but how?? I assume by plugging 0.15 as positive
95. Assuming no change in either the internal or external calcium ion concentration, what is the lowest membrane potential would there be no net movement of calcium across the membrane? Please explain how to solve this one, I set delta G to 0 and solve for V and get E, am I right?
B) -55 mV
E) +55 mV
THANK YOUU
Homework Answers
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A cell biologist interested in the transport of calcium ions
(Ca2+) across the plasma membrane of...
(1) Mitochondria regulate the concentration of calcium ions in the cytoplasm, by allowing the ions to equilibrate across...
(1) Mitochondria regulate the concentration of calcium ions in the cytoplasm, by allowing the ions to equilibrate across the mitochondrial membrane. If the mitochondrion has a membrane potential of –150 mV relative to the cytoplasm, and the cytoplasmic concentration of Ca2+ is 1 μM, what is the mitochondrial Ca2+ concentration? Assume a temperature of 37 C. (2) The membrane calcium pump of the malarial parasite Trypanosoma cruzipumps out calcium ions from the parasite cell interior, hydrolyzing one molecule of ATP...
Assume that a bacterial cell maintains a proton gradient across its plasma membrane such that the...
Assume that a bacterial cell maintains a proton gradient across its plasma membrane such that the pH inside the cell is 8.0 when the outside pH is 7.0. Calculate the energy available from proton gradient if the membrane potential is +180 mM and the temperature is 25∘C. Find delta G inwards, Express your answer as an integer cal/mol! Please provide formulas and show work
please show the work. thanks What is the free energy change for the transport of calcium...
please show the work. thanks
What is the free energy change for the transport of calcium ions into a cell. The intracellular [Ca2+] is 1 mM and extracellular [Ca2+] is 1 uM. Assume a membrane potential of -100 mV and T-25°C. Give your answer in kJ/mol to one decimal place.
Under certain circumstances, potassium ions in a cell will move across the cell membrane from the...
Under certain circumstances, potassium ions in a cell will move
across the cell membrane from the inside to the outside. The
potential inside the cell is -75.5mV and the potential outside he
cell is zero. What is the change in the electrical potential energy
of a single potassium ion as it moves across the membrane ?
orries TxLakehead University-PHYS 1N Net iscms/mod/ficn/view.php?id 429903 Jump to... Winter19-MACKAY > Activities and Due Dates > HW: Electric Potential re: ResourcesGive Up Feedback Attempt...
Under certain circumstances, potassium ions (K") in a cell will move across the cell membrane from...
Under certain circumstances, potassium ions (K") in a cell will move across the cell membrane from the inside to the outside. The potential inside the cell is -80.5 mV and the potential outside the cell is zero. What is the change in the electrical potential energy of a single potassium ion as it moves across the membrane? change in potential energy: 1.36 x10 Does the potential energy of the potassium ions increase, decrease, or remain the same as the ions...
Under certain circumstances, potassium ions (K+) in a cell will move across the cell membrane from...
Under certain circumstances, potassium ions (K+) in a cell will move across the cell membrane from the inside to the outside. The potential inside the cell is-80.5 mV and the potential outside the cell is zero. What is the change in the electrical potential energy of a single potassium ion as it moves across the membrane? change in potential energy: Does the potential energy of the potassium ions increase, decrease, or remain the same as the ions move from the...
Under certain circumstances, potassium ions (K) in a cell will move across the cell membrane from...
Under certain circumstances, potassium ions (K) in a cell will move across the cell membrane from the inside to the outside. The potential inside the cell is -70.5 mV and the potential outside the cell is zero. What is the change in the electrical potential energy of a single potassium ion as it moves across the membrane? change in potential energy: Does the potential energy of the potassium ions increase, decrease, or remain the same as the ions move from...
0 Attempt 1 of 22> Potassium ions (K) move across a 9.0-nm-thick cell membrane from the...
0 Attempt 1 of 22> Potassium ions (K) move across a 9.0-nm-thick cell membrane from the inside to the outside. The potential inside the cell is -70.0 mV, and the potential outside is zero. What is the change in the electrical potential energy AU of the potassium ions as they move across the membrane? AUelectric =1 1.214 ×10-20
Potassium ions (K+) move across a 7.0-nm- thick cell membrane from the inside to the outside....
Potassium ions (K+) move across a 7.0-nm- thick cell membrane from the inside to the outside. The potential inside the cell is −80.0 mV, and the potential outside is zero. What is the change in the electrical potential energy Δ? electric of the potassium ions as they move across the membrane?
Neuron celts generate electrical signals electrical potential across the cell membrane? Body temp...
Neuron celts generate electrical signals electrical potential across the cell membrane? Body temperature is 310 K. The sign idenones the change in the clectrca granents across membranes Assung a potassum k n concermation of O00250 М nside the ceu, and a concentaton of O 135 Moutsoe the cet wnat is the potentat accoss the membrane and wnich way the ions now (answer in mv) Ansner Check Neuron cells generate electrical signals by concentration gradients across membranes. Assuming a potassium ion...
please show the work. thanks
What is the free energy change for the transport of calcium ions into a cell. The intracellular [Ca2+] is 1 mM and extracellular [Ca2+] is 1 uM. Assume a membrane potential of -100 mV and T-25°C. Give your answer in kJ/mol to one decimal place.
Under certain circumstances, potassium ions in a cell will move
across the cell membrane from the inside to the outside. The
potential inside the cell is -75.5mV and the potential outside he
cell is zero. What is the change in the electrical potential energy
of a single potassium ion as it moves across the membrane ?
orries TxLakehead University-PHYS 1N Net iscms/mod/ficn/view.php?id 429903 Jump to... Winter19-MACKAY > Activities and Due Dates > HW: Electric Potential re: ResourcesGive Up Feedback Attempt...
Under certain circumstances, potassium ions (K") in a cell will move across the cell membrane from the inside to the outside. The potential inside the cell is -80.5 mV and the potential outside the cell is zero. What is the change in the electrical potential energy of a single potassium ion as it moves across the membrane? change in potential energy: 1.36 x10 Does the potential energy of the potassium ions increase, decrease, or remain the same as the ions...
Under certain circumstances, potassium ions (K+) in a cell will move across the cell membrane from the inside to the outside. The potential inside the cell is-80.5 mV and the potential outside the cell is zero. What is the change in the electrical potential energy of a single potassium ion as it moves across the membrane? change in potential energy: Does the potential energy of the potassium ions increase, decrease, or remain the same as the ions move from the...
Under certain circumstances, potassium ions (K) in a cell will move across the cell membrane from the inside to the outside. The potential inside the cell is -70.5 mV and the potential outside the cell is zero. What is the change in the electrical potential energy of a single potassium ion as it moves across the membrane? change in potential energy: Does the potential energy of the potassium ions increase, decrease, or remain the same as the ions move from...
0 Attempt 1 of 22> Potassium ions (K) move across a 9.0-nm-thick cell membrane from the inside to the outside. The potential inside the cell is -70.0 mV, and the potential outside is zero. What is the change in the electrical potential energy AU of the potassium ions as they move across the membrane? AUelectric =1 1.214 ×10-20
Neuron celts generate electrical signals electrical potential across the cell membrane? Body temperature is 310 K. The sign idenones the change in the clectrca granents across membranes Assung a potassum k n concermation of O00250 М nside the ceu, and a concentaton of O 135 Moutsoe the cet wnat is the potentat accoss the membrane and wnich way the ions now (answer in mv) Ansner Check Neuron cells generate electrical signals by concentration gradients across membranes. Assuming a potassium ion...
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