What is the current in amperes if 1500 Na+ ions flow across a cell membrane in...
What is the current in amperes if 1500 Na+ ions flow across a cell membrane in 3.6 μs ? The charge on the sodium is the same as on an electron, but positive. Express your answer to two significant figures and include the appropriate units.
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What is the current in amperes if 1500 Na+ ions flow across a cell membrane in...
Calculate the equilibrium membrane potentials to be expected across a membrane at 37 ∘C, with a...
Calculate the equilibrium membrane potentials to be expected across a membrane at 37 ∘C, with a NaCl concentration of 0.10 M on the right and 0.01 M on the left, given the following conditions. Consider the process is spontaneous. Part A Membrane permeable only to Na+. Express your answer to three significant figures and include the appropriate units. Δψ = Part B State which side is positive (+) Part C Membrane permeable only to Cl−. Express your answer to three...
The capacitance of the cell membrane is estimated to be 89 pF, and approximately 10000 Na+...
The capacitance of the cell membrane is estimated to be 89 pF, and approximately 10000 Na+ ions flow through an ion channel when it opens. 1. Based on this information and what you learned in this chapter about the action potential, estimate the total number of sodium ion channels in the membrane of a nerve cell. Express your answer using two significant figures. (N = ???)
1- During an action potential, Na+Na+ ions move into the cell at a rate of about...
1- During an action potential, Na+Na+ ions move into the cell at a rate of about 3×10−7mol/m2⋅s3×10−7mol/m2⋅s. How much power must be produced by the "active Na+Na+ pumping" system to produce this flow against a +30−mV+30−mV potential difference? Assume that the axon is 60 cmcm long and 30 μmμm in diameter. Express your answer using two significant figures. 2- A 4.80-mm length of 2.6-mmmm-diameter wire carries a 850 mAmA current when 19.0 mVmV is applied to its ends. If the...
please answer all questions with clear work A flashlight bulb draws 2.5 amps when connected to...
please answer all questions with clear work
A flashlight bulb draws 2.5 amps when connected to two C cells (3 volts). What is the power dissipated in the bu lb? View Available Hint(s 3.6 W O 3W O 7.5 W O None of the above. Request Answer Submit One billion electrons pass a certain point in a microsecond. This corresponds to a current of View Available Hint(s) O None of the listed responses is correct 0.00016 A 0.00000016 A O1x1015...
Problem 14.21 - Enhanced - with Solution 19 of 19 Assuming a membrane potential across the inner ...
Problem 14.21 - Enhanced - with Solution 19 of 19 Assuming a membrane potential across the inner membrane of 177 mV (inside negative), calculate the ratio of the [Ca2 matrix to that in the cytoplasm(Cthat would exist at equilibrium (i.e, AG 0) Express your answer using two significant figures. in the ReviewI Constants Periodic Table Calcium is an important regulator of the citric acid cycle. Calcium is transported across the mitochondrial inner membrane by the negative potential inside the matrix....
the electric field across a cell membrane is 1.0x10^7N/C directed into the cell. if a pores...
the electric field across a cell membrane is 1.0x10^7N/C directed into the cell. if a pores opens which way do sodium ions flow into the cell or out of the cell. what is the magnitude of the electric force on the sodium ion? the charge on the sodium ion is + e
1. If the membrane potential of sodium ions in a cell is equal to +60 mV,...
1. If the membrane potential of sodium ions in a cell is equal to +60 mV, what is its membrane potential for chloride ions if they are found in the exact same concentrations as sodium? Give your answer in mV. 2. Given a cell membrane with the following parameters- Ion Extracellular concentration (mmol/L) Intracellular concentration (mmol/L) Permeability K+ 10 150 1 Na+ 140 15 0.04 Cl- 100 7 0.45 calculate the membrane potential of the cell in mV. (Round your...
Under certain circumstances, potassium ions K++ move across the 8.0-nm-thick cell membrane from the inside to...
Under certain circumstances, potassium ions K++ move across the
8.0-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. Assume that a potassium ion carries a charge of
1.602××10−19−19 C.
Unit 3: Prelecture Problems Problems: Electric Potential & Capacitor Deadline: 100% until Sunday, January 27 at 11:59 PM ▼ Cumulative Problem 6 Under certain circumstances, potassium ions K+ move across the 8.0-nm-thick cell membrane from the inside...
Part A Assume that a red blood cell is spherical with a radius of 3.6 x...
Part A Assume that a red blood cell is spherical with a radius of 3.6 x 10-ºm and with wall thickness of 8.6 x 10 m. The dielectric constant of the membrane is about 5.0. The potential difference across the membrane is 0.080 V Assuming the cell is a parallel plate capacitor, estimate the capacitance of the cell. Express your answer with the appropriate units. C= Value Units Submit Request Answer Part B Determine the positive charge on the outside...
Consider the circuit shown in. Suppose that epsilon = 10 V. Part A Find the current...
Consider the circuit shown in. Suppose that epsilon = 10 V. Part A Find the current through the resistor a. Express your answer to two significant figures and include the appropriate units. Part B Find the current through the resistor a. Express your answer to two significant figures and include the appropriate units. Part C Find the current through the resistor b. Express your answer to two significant figures and include the appropriate units. Part D Find the potential difference...
please answer all questions with clear work
A flashlight bulb draws 2.5 amps when connected to two C cells (3 volts). What is the power dissipated in the bu lb? View Available Hint(s 3.6 W O 3W O 7.5 W O None of the above. Request Answer Submit One billion electrons pass a certain point in a microsecond. This corresponds to a current of View Available Hint(s) O None of the listed responses is correct 0.00016 A 0.00000016 A O1x1015...
Problem 14.21 - Enhanced - with Solution 19 of 19 Assuming a membrane potential across the inner membrane of 177 mV (inside negative), calculate the ratio of the [Ca2 matrix to that in the cytoplasm(Cthat would exist at equilibrium (i.e, AG 0) Express your answer using two significant figures. in the ReviewI Constants Periodic Table Calcium is an important regulator of the citric acid cycle. Calcium is transported across the mitochondrial inner membrane by the negative potential inside the matrix....
Under certain circumstances, potassium ions K++ move across the
8.0-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. Assume that a potassium ion carries a charge of
1.602××10−19−19 C.
Unit 3: Prelecture Problems Problems: Electric Potential & Capacitor Deadline: 100% until Sunday, January 27 at 11:59 PM ▼ Cumulative Problem 6 Under certain circumstances, potassium ions K+ move across the 8.0-nm-thick cell membrane from the inside...
Part A Assume that a red blood cell is spherical with a radius of 3.6 x 10-ºm and with wall thickness of 8.6 x 10 m. The dielectric constant of the membrane is about 5.0. The potential difference across the membrane is 0.080 V Assuming the cell is a parallel plate capacitor, estimate the capacitance of the cell. Express your answer with the appropriate units. C= Value Units Submit Request Answer Part B Determine the positive charge on the outside...
Consider the circuit shown in. Suppose that epsilon = 10 V. Part A Find the current through the resistor a. Express your answer to two significant figures and include the appropriate units. Part B Find the current through the resistor a. Express your answer to two significant figures and include the appropriate units. Part C Find the current through the resistor b. Express your answer to two significant figures and include the appropriate units. Part D Find the potential difference...
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