An ion channel in a cell membrane carries 2.4 pA when it's open, which is only 20% of the time. (a) What's the average current in the channel? (b) If the channel opens for 1.0 ms, how many singly ionized ions pass through in this time?

An ion channel in a cell membrane carries 2.4 pA when it's open, which is only 20% of the time. (a) What's the average current in the channel? (b) If the channel opens for 1.0 ms, how many singly ionized ions pass through in this time?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter28: Current And Resistance

Section: Chapter Questions

Problem 63PQ

See similar textbooks

Related questions

Q: A wave has wavelength of 18 m and a speed of 250 m/s. What is the period of the wave?

A: The wavelength of a wave is given by λ = vf, where v = speed of the wave and f = frequency of the wa...

Q: For A= 3î + 5j – k, B = -2î + 29 + Sk, and C = 4j – 3k, find C (A - B).

A: We first do the operation in the brackets and then proceed with the dot product. We first subtract B...

Q: Find the force of attraction between the Earth and the moon using the following data: • Mass of the ...

Q: A 7.7 μF capacitor is charged by a 150 V battery (see the figure (Figure 1) a) and then is disconnec...

Q: 2. Calculate the magnitude of force of gravitational attraction between two metal balls used in men'...

A: Answer:- Given Mass of first ball (m1) = 7.26 kg Mass of second ball(m2) = 7.26 kg Distance (r) ...

Q: The Gauss law were used as an alternative to Coulomb's law; which means we can also solve the total ...

Q: In below circuit, calculate the current in the 10 2 resistor, in Amperes. A) 0.4 B) 0.8 C) 1.2 D) 3....

Q: Find T so that block B will start moving towards the left. Use o.40 as the coefficient of friction f...

A: Solution: given that WA = 20 N WB = 50 N coefficient of friction = 0.4

Q: A parallel plate capacitor has a capacitance of 7.0 µF when filled with a dielectric. The area of ea...

Q: Weight refers to the force of gravity acting on a mass. We often calculate the weight of an object b...

Q: A solid conducting sphere of radius 2.00 cm has a charge of 6.62 C. A conducting spherical shell of ...

Q: An air-filled capacitor consists of two parallel plates, each with an area of 7.60 cm2, separated by...

Q: What is the magnitude, in volts, of the maximum potential difference between two parallel conducting...

A: Given: The strength of the electric field is 3x106 V/m. The separation between plates is 0.51 cm.

Q: A car is moving to the right blasting the "Cantina Band" song from Star Wars IV A New Hope. The car ...

Q: What is the work required by friction to stop a 6.7 kg block sliding on a table if it initially has ...

Q: y F2 F1 02 х F2 = 883 lb = 30° 02 = 46° Magnitud de la Fuerza F2 = _ lb ---

A: Given value--- F2 = 883 lb. angle 1 = 30 degree . angle 2 = 46 degree . We have to find--- F1 = ?...

Q: A 2.60 kg block is initially at rest on a horizontal surface. A horizontal force F of magnitude 7.29...

Q: Find the value of acceleration

Q: The swept area of wind turbines is increased by a factor 4, by doubling the blade length. Prove the ...

Q: 4 Suppese that the water level of a river is 34 meters and that tis receding ata rate of050 meters p...

A: Since you have posted a question with a multiple sub parts, we will solve first three sub - parts fo...

Q: A person is driving on Autobahn at a speed of 215 km/h and has to slam on his brakes to avoid collis...

Q: A woman pushes her car in a straight line along a horizontal driveway a distance 3.7 m with a consta...

Q: JD is playing with some clay (mass 21-g). He flings it across the room, where it lodges on the hood ...

Q: A solid body of a certain material has a mass of 700 g and a volume of 2.587 cubic centimeters. Calc...

Q: E h A(2,2,2) y P R(2.25.2,5.0)

Q: A positive particie traveling upwards enters a region of uniform electric field pointing rightward. ...

A: The electric force on a point charge in a uniform electric field is given by, F = qE Where, F = ele...

Q: An electron moves in the magnetic field B= 0.460 i T with a speed of 0.800 x107 m/s in the direction...

Q: How do I find the tangential speed of a ball going in uniform circular motion, in the problem I'm wo...

Q: A freezer sustains a cold environment of -22°C and exhausts its heat at 40°C. Assume a Carnot cycle....

Q: Can you give a practical example of how a body can still accelerate even without changing its speed?...

A: Acceleration is the rate of change of velocity. That is a body accelerates when there is a change in...

Q: 6. Briefly explain the difference between hardness and hardenability

A: The goal of spherodising heat treatment is to create a spherodeitic microstructured steel alloy that...

Q: Consider a uniform electric field E of magnitude E = 6.2 N/C. The line segment connecting points A a...

Q: A positive particle traveling upwards with initial speed vo = 10°m/s enters a region of uniform elec...

Q: After a point charge, +7Q, is placed inside the cavity of a conductor, electrostatic equilibrium is ...

A: Given data: The point charge is q1=+7Q. The additional charge is q2=-5Q.

Q: What are some applications for a series-parallel circuit? Choose one of the applications and tell ev...

Q: 40.lf 83680 J of heat are required to raise the temperature of 4 kg of water by 5 °C, then the speci...

Q: 1. On this context, define potential and if possible, make an analogy of your own as well. 2. What's...

Q: If the resultant force acting on the bracket is to be directed along the positive x-axis, determine ...

Q: Examples of energy density and electrical field in capacitor in real life.

A: Energy density is defined as the total energy per unit volume of the capacitor. Since, Now, for a pa...

Q: T is the temperat 331.5+(23x0.6) ist %3D 5. How does your calculation for the speed of sound compare...

A: 5) The speed of sound is 331.5 m/s and the speed of sound in the room is 345.3 m/s.

Q: A particle moving in a straight line has an acceleration a = 4t – 9. Its initial velocity is 4m/s. F...

A: Given Acceleration, A = 4×t -9 m/s2 Initial velocity, U = 4 m/s Final velocity,V =????? , After ti...

Q: Two equal charges of magnitude 1.1 x 10 7 C experience an electrostatic force of 4.2 x 104 N. How ...

A: Given Data, Magnitude of charges (q1=q2=q)=1.1×107 C Electrostatic Force(F)=4.2×104 N

Q: What is the wavelength spectrum of photons being emitted by an object that is 2000 degrees celcius

A: Wien's law: According to the radiation rule, the wavelength of maximum emission of every objects is ...

Q: For the circuit shown in the figure, determine the magnitude of the currents 12, 13, and l4 passing ...

Q: Billy Joe pulled a large block of wood is across a frozen lake at a constant velocity. The block's m...

Q: A bus travels for 2 hrs at 60 kph and another 3 hrs at 70 kph. What is its average speed?

A: first interval : time = 2 hours speed = 60 km per hour second interval : time = 3 hours speed = 70 k...

Q: The overall length of a piccolo is 31.0 cm. The resonating air column is open at both ends. (a) Find...

Q: Need some assistance figuring this one out! Force F pulls upward on link A with magnitude 622N ...

Q: Why is it easier to walk on a carpeted floor than on a smooth, polished floor. a) In your response i...

Q: A 57 kg skier starts from rest at height H = 12 m above the end of a ski-jump ramp (see the figure)....

Concept explainers

Ohm's law

Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

Path of Least Resistance

In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.

Question

42. An ion channel in a cell membrane carries 2.4 pA when it's open,
BIO which is only 20% of the time. (a) What's the average current in
the channel? (b) If the channel opens for 1.0 ms, how many singly
ionized ions pass through in this time?

Expert Solution

Step 1

Solution of part A

The average current is given by

$I_{a v r} = 2.4 \times 10^{- 12} \times \frac{20}{100} I_{a v r} = 0.48 \times 10^{- 12} A I_{a v r} = 0.48 p A$

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

The current supplied to an ail conditioner unit is 4.00 amps. The air conditioner is wired using a 10-gauge (diameter 2.588 mm) wire. The charge density is n=8.481028electronsm3 Find magnitude of (a) current density and (b) the drift velocity.
An aluminum wire is 400 m long and 0.7 cm thick. How much is its resistance? How much current can flow through it if connected to a 500 – V source?
What current flows through a 2.58-cm-diameter rod of pure silicon that is 19.0 cm long, when 1.00 ✕ 103 V is applied to it?
During open-heart surgery, a defibrillator can be used to bring a patient out of cardiac arrest. During such a procedure, the resistance of the path is 525 Ω and a 11.5 mA current is needed. What voltage should be applied in V?
During surgery, a current as small as 20.0 µA applied directly to the heart may cause ventricular fibrillation. If the resistance of the exposed heart is 253 Ω, what is the smallest voltage (in mV) that poses this danger?
A 300-km-long high-voltage transmission line 2.0 cm in diameter carries a steady current of 1,240 A. If the conductor is copper with a free charge density of 8.5 1028 electrons per cubic meter, how many years does it take one electron to travel the full length of the cable? (Use 3.156 107 for the number of seconds in a year.) ?yr
In an experiment on muscle a voltage of 6.64 V is applied, resulting in a current of 57.1 mA. What is the resistance of this muscle, in Ω? What voltage is needed to supply 593 mW of power to a 2.64 kΩ resistor?