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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 0.30-nm-diameter potassium ion (K) channel carries a current of 1.8 pA. Part A How many potassium ions pass through if the ion channel opens for 1.0 ms? IVE ΑΣΦ Submit Request Answer Part B What is the current density in the ion channel? — ΑΣΦ Submit Request Answer ? ? ions A/m²

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 0.30-nm-diameter potassium ion (K) channel carries a current of 1.8 pA. Part A How many potassium ions pass through if the ion channel opens for 1.0 ms? IVE ΑΣΦ Submit Request Answer Part B What is the current density in the ion channel? — ΑΣΦ Submit Request Answer ? ? ions A/m²

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 lon. Measurements with microelectrodes have shown that a 0.30-nm-diameter potassium ion (K+) channel carries a current of 1.8 pA. Part A How many potassium ions pass through if the ion channel opens for 1.0 ms? [5] ΑΣΦ Submit Part B Request Answer What is the current density in the ion channel? ΠΕ ΑΣΦ Submit Request Answer ? ? ions A/m²
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 lon. Measurements with microelectrodes have shown that a 0.30-nm-diameter potassium ion (K+) channel carries a current of 1.8 pA. Part A How many potassium ions pass through if the ion channel opens for 1.0 ms? [5] ΑΣΦ Submit Part B Request Answer What is the current density in the ion channel? ΠΕ ΑΣΦ Submit Request Answer ? ? ions A/m²
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