Suppose that the resistance between the walls of a biological cell is 6.4 × 109 Ω....
Suppose that the resistance between the walls of a biological
cell is 6.4 × 109 Ω. (a) What is the
current when the potential difference between the walls is 78 mV?
(b) If the current is composed of Na+
ions (q = +e), how many such ions flow in 0.54
s?
Homework Answers
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Suppose that the resistance between the walls of a biological
cell is 6.4 × 109 Ω....
CJ10 20.P005 Suppose that the resistance between the walls of a biological cell is 6.00 x...
CJ10 20.P005 Suppose that the resistance between the walls of a biological cell is 6.00 x 109 (a) What is the current when the potential difference between the walls is 90 mv? 1.510 -10 XA (b) If the current is composed of Nat ions (q - +e), how many such ions 1.22 10**8ions flow in 1.3 Additional Materials Section 20.2 Submit Answer Save Progress Practic 2/2 points | Previous Answers CU10 20 P 006 A car battery has a rating...
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...
Consider the following for problems 1 through 5: The concept of electric potential difference plays an...
Consider the following for problems 1 through 5: The concept of electric potential difference plays an important role in the human nervous system. A nervous impulse, for example, is an action potential that results from the temporal rising and lowering of the cell membrane potential, which in turn is caused by the equally temporal influx of sodium (Na+) ions into the cell. The sodium ions enter the cell through Hodgkin-Huxley channels, named after English physiologist/biophysicists Alan Hodgkin and Andrew Huxley....
Please help and show work. I keep getting the wrong answers for these problems 1. Cell...
Please help and show work. I keep getting the wrong answers for these problems 1. Cell membranes contain channels that allow Na + ions to rush in. Consider a channel that has a diameter of 2.91 nm and a length of 13.5 nm. If the channel has a resistance of 18.5 GΩ, what is the resistivity ? of the solution in the channel? 2. What is the resistance of a 54.154.1-m-long aluminum wire that has a diameter of 8.79 mm8.79...
A cell membrane has a surface area of 1.2 × 10−7 m2, a dielectric constant of...
A cell membrane has a surface area of 1.2 × 10−7 m2, a dielectric constant of 5.5, and a thickness of 7.1 nm. The potential difference across the membrane is 60 mV. Round youranswers to two significant figures. (a) What is the magnitude of the charge on each surface of the membrane? Q = pC (b) How many ions are on each surface of the membrane, assuming they are singly charged (|q| = e)? ___ × 10
a) Find the equivalent resistance between points a and b in Figure 1 (R = 17.00 22). If a potential difference of...
a) Find the equivalent resistance between points a and b in Figure 1 (R = 17.00 22). If a potential difference of 340 V is applied between points a and b, calculate the current in each resistor. What is the potential difference a cross each resistance? 2. The ammeter shown in the figure 2 below reads 2.28 A. Find 11, 12, and using Kirchhoff's rules. 3. An uncharged capacitor and a resistor are connected in series to a battery, where...
Suppose you measure the terminal voltage of a 1.585V alkaline cell having an internal resistance of...
Suppose you measure the terminal voltage of a 1.585V alkaline
cell having an internal resistance of 0.100 Ω by placing a 1.00kΩ
voltmeter across its terminals. (See figure.)
What current flows?
A. 1.59 mA
B. 159 mA
C. 1.58 mA
D. 15.9 A
Find the terminal voltage.
A. 1.5850 V (need four digits to see the difference)
B. 1.5852 V
C. 1.5848 V
D. 1.6850 V
To see how close the measured terminal voltage is to the
emf, calculate their...
Please show all work 10. Suppose point A is 0.4m from point B. a. What is...
Please show all work
10. Suppose point A is 0.4m from point B. a. What is the conduction time required for an action potential to travel this distance if a single neuron spans this distance and has a conduction velocity is 60m/sec? b. What is the conduction yelocity if the pathway consists of three neurons, two synapses and the synaptic delay is 1 msec? 11. Ohm's Law describes the movement of ions across a membrane: I-G(Vm-E). I is the current...
An engineer is designing a process for a new transistor. She uses a vacuum chamber to...
An engineer is designing a process for a new transistor. She uses a vacuum chamber to bombard a thin layer of silicon with ions of phosphorus, each of mass mP = 5.18 × 10-26 kg. The phosphorus ions are doubly ionized, with each phosphorus ion lacking two electrons. The ions start at rest at one end of the vacuum chamber and are accelerated by an electric field over a distance of re = 35 cm before they strike the silicon...
Part A through H 1. [60 pts) A galvanic cell is a type of battery where...
Part A through H
1. [60 pts) A galvanic cell is a type of battery where the electrodes are immersed in different electrolyte solutions, which are connected by an ion-conducting bridge. Consider a galvanic cell with Al and Cu electrodes. The Al electrode is immersed in a solution containing a standard concentration of Al3+ ions and the Cu electrode is immersed in a solution containing a standard concentration of Cu* ions. External Circuit The standard reduction potentials for the half...
CJ10 20.P005 Suppose that the resistance between the walls of a biological cell is 6.00 x 109 (a) What is the current when the potential difference between the walls is 90 mv? 1.510 -10 XA (b) If the current is composed of Nat ions (q - +e), how many such ions 1.22 10**8ions flow in 1.3 Additional Materials Section 20.2 Submit Answer Save Progress Practic 2/2 points | Previous Answers CU10 20 P 006 A car battery has a rating...
a) Find the equivalent resistance between points a and b in Figure 1 (R = 17.00 22). If a potential difference of 340 V is applied between points a and b, calculate the current in each resistor. What is the potential difference a cross each resistance? 2. The ammeter shown in the figure 2 below reads 2.28 A. Find 11, 12, and using Kirchhoff's rules. 3. An uncharged capacitor and a resistor are connected in series to a battery, where...
Suppose you measure the terminal voltage of a 1.585V alkaline
cell having an internal resistance of 0.100 Ω by placing a 1.00kΩ
voltmeter across its terminals. (See figure.)
What current flows?
A. 1.59 mA
B. 159 mA
C. 1.58 mA
D. 15.9 A
Find the terminal voltage.
A. 1.5850 V (need four digits to see the difference)
B. 1.5852 V
C. 1.5848 V
D. 1.6850 V
To see how close the measured terminal voltage is to the
emf, calculate their...
Please show all work
10. Suppose point A is 0.4m from point B. a. What is the conduction time required for an action potential to travel this distance if a single neuron spans this distance and has a conduction velocity is 60m/sec? b. What is the conduction yelocity if the pathway consists of three neurons, two synapses and the synaptic delay is 1 msec? 11. Ohm's Law describes the movement of ions across a membrane: I-G(Vm-E). I is the current...
Part A through H
1. [60 pts) A galvanic cell is a type of battery where the electrodes are immersed in different electrolyte solutions, which are connected by an ion-conducting bridge. Consider a galvanic cell with Al and Cu electrodes. The Al electrode is immersed in a solution containing a standard concentration of Al3+ ions and the Cu electrode is immersed in a solution containing a standard concentration of Cu* ions. External Circuit The standard reduction potentials for the half...
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