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he biochemistry that takes place inside cells depends on various elements, such as sodium, potassium, and calcium, that are dissolved in water as ions. These ions enter cells through narrow pores in the cell membrane known as lon hannels. Each ion channel, which is formed from a specialized protein molecule, is selective for one type of ion. Measurements with microelectrodes have shown that a 0.269 nm diameter potassium ion (K*) channel carries a current f 7.49 pA. How many potassium ions pass through if the ion channel opens for 1.48 ms? Submit Answer Tries 0/10 What is the current density (in A/m/m) the ion channel? Submit Answer Tries 0/10

he biochemistry that takes place inside cells depends on various elements, such as sodium, potassium, and calcium, that are dissolved in water as ions. These ions enter cells through narrow pores in the cell membrane known as lon hannels. Each ion channel, which is formed from a specialized protein molecule, is selective for one type of ion. Measurements with microelectrodes have shown that a 0.269 nm diameter potassium ion (K*) channel carries a current f 7.49 pA. How many potassium ions pass through if the ion channel opens for 1.48 ms? Submit Answer Tries 0/10 What is the current density (in A/m/m) the ion channel? Submit Answer Tries 0/10

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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The biochemistry that takes place inside cells depends on various elements, such as sodium, potassium, and calcium, that are dissolved in water as ions. These ions enter cells through narrow pores in the cell membrane known as ion channels. Each ion channel, which is formed from a specialized protein molecule, is selective for one type of ion. Measurements with microelectrodes have shown that a 0.269 nm diameter potassium ion (K+) channel carries a current of 7.49 pA. How many potassium ions pass through if the ion channel opens for 1.48 ms? Submit Answer Tries 0/10 What is the current density (in A/m/m) in the ion channel? Submit Answer Tries 0/10
Transcribed Image Text:The biochemistry that takes place inside cells depends on various elements, such as sodium, potassium, and calcium, that are dissolved in water as ions. These ions enter cells through narrow pores in the cell membrane known as ion channels. Each ion channel, which is formed from a specialized protein molecule, is selective for one type of ion. Measurements with microelectrodes have shown that a 0.269 nm diameter potassium ion (K+) channel carries a current of 7.49 pA. How many potassium ions pass through if the ion channel opens for 1.48 ms? Submit Answer Tries 0/10 What is the current density (in A/m/m) in the ion channel? Submit Answer Tries 0/10
Expert Solution
Step 1 GIVEN

Current, i = 7.49 pA = 7.49×10-12 A

Time, ∆t = 1.48 ms = 1.48×10-3 s

Diameter, d = 0.269 nm = 0.269 ×10-9  m

Radius, r = d/2 = 0.1345 nm = 0.1345×10-9 m

 

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