The pore-forming membrane proteins are referred to as ion channels, which permit the ions to cross the channel pore. Their main functions include establishing a resting membrane potential and shaping action potentials and other signals by allowing the flow of ions across the membrane.

Question

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Answer 1

Question

Chapter 43, Problem 1TYK

Summary Introduction

Introduction:

The pore-forming membrane proteins are referred to as ion channels, which permit the ions to cross the channel pore. Their main functions include establishing a resting membrane potential and shaping action potentials and other signals by allowing the flow of ions across the membrane.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

The neurons have a significantly larger number of potassium leak channels, which facilitate the leakage of potassium ion across the membrane.

Explanation of Solution

Explanation/Justification for the correct answer:

Option (b) is given as potassium ion (K⁺). K⁺ is a micronutrient that is required by almost all cell types and is also necessary for the maintenance of the electrolyte and fluid balance in the body. The sodium–potassium pump creates the potassium gradient across the cell, with the higher concentration of potassium inside the cell. Thus, the K⁺ ions move from a higher concentration region to a lower concentration region, in turn generating an action potential. Furthermore, this helps in achieving the negative resting potential of the cell. Hence, option (b) is correct.

Explanation for incorrect answers:

Option (a) is given as calcium ions (Ca²⁺). The leakage of Ca²⁺ ions does not occur in order to achieve the resting potential as the concentration gradient for Ca²⁺ ions is not created by the sodium–potassium pump. So, it is a wrong answer.

Option (c) is given as sodium ions (Na⁺). The number of leak channels for Na⁺ ions is comparatively less than that for potassium ions. So, it is a wrong answer.

Option (d) is given as chloride ions (Cl⁺). The chloride ions are present as Cl⁻ and not as Cl⁺. So, it is a wrong answer.

Hence, options (a), (c), and (d) are incorrect.

Conclusion

Therefore, it can be concluded that the potassium ions leak across the neuron’s membrane and thereby accomplish the resting potential.

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Answer 2

Question

Chapter 43, Problem 1TYK

Summary Introduction

Introduction:

The pore-forming membrane proteins are referred to as ion channels, which permit the ions to cross the channel pore. Their main functions include establishing a resting membrane potential and shaping action potentials and other signals by allowing the flow of ions across the membrane.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

The neurons have a significantly larger number of potassium leak channels, which facilitate the leakage of potassium ion across the membrane.

Explanation of Solution

Explanation/Justification for the correct answer:

Option (b) is given as potassium ion (K⁺). K⁺ is a micronutrient that is required by almost all cell types and is also necessary for the maintenance of the electrolyte and fluid balance in the body. The sodium–potassium pump creates the potassium gradient across the cell, with the higher concentration of potassium inside the cell. Thus, the K⁺ ions move from a higher concentration region to a lower concentration region, in turn generating an action potential. Furthermore, this helps in achieving the negative resting potential of the cell. Hence, option (b) is correct.

Explanation for incorrect answers:

Option (a) is given as calcium ions (Ca²⁺). The leakage of Ca²⁺ ions does not occur in order to achieve the resting potential as the concentration gradient for Ca²⁺ ions is not created by the sodium–potassium pump. So, it is a wrong answer.

Option (c) is given as sodium ions (Na⁺). The number of leak channels for Na⁺ ions is comparatively less than that for potassium ions. So, it is a wrong answer.

Option (d) is given as chloride ions (Cl⁺). The chloride ions are present as Cl⁻ and not as Cl⁺. So, it is a wrong answer.

Hence, options (a), (c), and (d) are incorrect.

Conclusion

Therefore, it can be concluded that the potassium ions leak across the neuron’s membrane and thereby accomplish the resting potential.

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Answer 3

Question

Chapter 43, Problem 1TYK

Summary Introduction

Introduction:

The pore-forming membrane proteins are referred to as ion channels, which permit the ions to cross the channel pore. Their main functions include establishing a resting membrane potential and shaping action potentials and other signals by allowing the flow of ions across the membrane.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

The neurons have a significantly larger number of potassium leak channels, which facilitate the leakage of potassium ion across the membrane.

Explanation of Solution

Explanation/Justification for the correct answer:

Option (b) is given as potassium ion (K⁺). K⁺ is a micronutrient that is required by almost all cell types and is also necessary for the maintenance of the electrolyte and fluid balance in the body. The sodium–potassium pump creates the potassium gradient across the cell, with the higher concentration of potassium inside the cell. Thus, the K⁺ ions move from a higher concentration region to a lower concentration region, in turn generating an action potential. Furthermore, this helps in achieving the negative resting potential of the cell. Hence, option (b) is correct.

Explanation for incorrect answers:

Option (a) is given as calcium ions (Ca²⁺). The leakage of Ca²⁺ ions does not occur in order to achieve the resting potential as the concentration gradient for Ca²⁺ ions is not created by the sodium–potassium pump. So, it is a wrong answer.

Option (c) is given as sodium ions (Na⁺). The number of leak channels for Na⁺ ions is comparatively less than that for potassium ions. So, it is a wrong answer.

Option (d) is given as chloride ions (Cl⁺). The chloride ions are present as Cl⁻ and not as Cl⁺. So, it is a wrong answer.

Hence, options (a), (c), and (d) are incorrect.

Conclusion

Therefore, it can be concluded that the potassium ions leak across the neuron’s membrane and thereby accomplish the resting potential.

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Answer 4

Question

Chapter 43, Problem 1TYK

Summary Introduction

Introduction:

The pore-forming membrane proteins are referred to as ion channels, which permit the ions to cross the channel pore. Their main functions include establishing a resting membrane potential and shaping action potentials and other signals by allowing the flow of ions across the membrane.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

The neurons have a significantly larger number of potassium leak channels, which facilitate the leakage of potassium ion across the membrane.

Explanation of Solution

Explanation/Justification for the correct answer:

Option (b) is given as potassium ion (K⁺). K⁺ is a micronutrient that is required by almost all cell types and is also necessary for the maintenance of the electrolyte and fluid balance in the body. The sodium–potassium pump creates the potassium gradient across the cell, with the higher concentration of potassium inside the cell. Thus, the K⁺ ions move from a higher concentration region to a lower concentration region, in turn generating an action potential. Furthermore, this helps in achieving the negative resting potential of the cell. Hence, option (b) is correct.

Explanation for incorrect answers:

Option (a) is given as calcium ions (Ca²⁺). The leakage of Ca²⁺ ions does not occur in order to achieve the resting potential as the concentration gradient for Ca²⁺ ions is not created by the sodium–potassium pump. So, it is a wrong answer.

Option (c) is given as sodium ions (Na⁺). The number of leak channels for Na⁺ ions is comparatively less than that for potassium ions. So, it is a wrong answer.

Option (d) is given as chloride ions (Cl⁺). The chloride ions are present as Cl⁻ and not as Cl⁺. So, it is a wrong answer.

Hence, options (a), (c), and (d) are incorrect.

Conclusion

Therefore, it can be concluded that the potassium ions leak across the neuron’s membrane and thereby accomplish the resting potential.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Chapter 43, Problem 1TYK

Summary Introduction

Introduction:

The pore-forming membrane proteins are referred to as ion channels, which permit the ions to cross the channel pore. Their main functions include establishing a resting membrane potential and shaping action potentials and other signals by allowing the flow of ions across the membrane.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

The neurons have a significantly larger number of potassium leak channels, which facilitate the leakage of potassium ion across the membrane.

Explanation of Solution

Explanation/Justification for the correct answer:

Option (b) is given as potassium ion (K⁺). K⁺ is a micronutrient that is required by almost all cell types and is also necessary for the maintenance of the electrolyte and fluid balance in the body. The sodium–potassium pump creates the potassium gradient across the cell, with the higher concentration of potassium inside the cell. Thus, the K⁺ ions move from a higher concentration region to a lower concentration region, in turn generating an action potential. Furthermore, this helps in achieving the negative resting potential of the cell. Hence, option (b) is correct.

Explanation for incorrect answers:

Option (a) is given as calcium ions (Ca²⁺). The leakage of Ca²⁺ ions does not occur in order to achieve the resting potential as the concentration gradient for Ca²⁺ ions is not created by the sodium–potassium pump. So, it is a wrong answer.

Option (c) is given as sodium ions (Na⁺). The number of leak channels for Na⁺ ions is comparatively less than that for potassium ions. So, it is a wrong answer.

Option (d) is given as chloride ions (Cl⁺). The chloride ions are present as Cl⁻ and not as Cl⁺. So, it is a wrong answer.

Hence, options (a), (c), and (d) are incorrect.

Conclusion

Therefore, it can be concluded that the potassium ions leak across the neuron’s membrane and thereby accomplish the resting potential.

Answer 6

Chapter 43, Problem 1TYK

Summary Introduction

Introduction:

The pore-forming membrane proteins are referred to as ion channels, which permit the ions to cross the channel pore. Their main functions include establishing a resting membrane potential and shaping action potentials and other signals by allowing the flow of ions across the membrane.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

The neurons have a significantly larger number of potassium leak channels, which facilitate the leakage of potassium ion across the membrane.

Explanation of Solution

Explanation/Justification for the correct answer:

Option (b) is given as potassium ion (K⁺). K⁺ is a micronutrient that is required by almost all cell types and is also necessary for the maintenance of the electrolyte and fluid balance in the body. The sodium–potassium pump creates the potassium gradient across the cell, with the higher concentration of potassium inside the cell. Thus, the K⁺ ions move from a higher concentration region to a lower concentration region, in turn generating an action potential. Furthermore, this helps in achieving the negative resting potential of the cell. Hence, option (b) is correct.

Explanation for incorrect answers:

Option (a) is given as calcium ions (Ca²⁺). The leakage of Ca²⁺ ions does not occur in order to achieve the resting potential as the concentration gradient for Ca²⁺ ions is not created by the sodium–potassium pump. So, it is a wrong answer.

Option (c) is given as sodium ions (Na⁺). The number of leak channels for Na⁺ ions is comparatively less than that for potassium ions. So, it is a wrong answer.

Option (d) is given as chloride ions (Cl⁺). The chloride ions are present as Cl⁻ and not as Cl⁺. So, it is a wrong answer.

Hence, options (a), (c), and (d) are incorrect.

Conclusion

Therefore, it can be concluded that the potassium ions leak across the neuron’s membrane and thereby accomplish the resting potential.

Answer 7

Chapter 43, Problem 1TYK

Summary Introduction

Introduction:

The pore-forming membrane proteins are referred to as ion channels, which permit the ions to cross the channel pore. Their main functions include establishing a resting membrane potential and shaping action potentials and other signals by allowing the flow of ions across the membrane.

Answer 8

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

The neurons have a significantly larger number of potassium leak channels, which facilitate the leakage of potassium ion across the membrane.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

Explanation of Solution

Explanation/Justification for the correct answer:

Option (b) is given as potassium ion (K⁺). K⁺ is a micronutrient that is required by almost all cell types and is also necessary for the maintenance of the electrolyte and fluid balance in the body. The sodium–potassium pump creates the potassium gradient across the cell, with the higher concentration of potassium inside the cell. Thus, the K⁺ ions move from a higher concentration region to a lower concentration region, in turn generating an action potential. Furthermore, this helps in achieving the negative resting potential of the cell. Hence, option (b) is correct.

Explanation for incorrect answers:

Option (a) is given as calcium ions (Ca²⁺). The leakage of Ca²⁺ ions does not occur in order to achieve the resting potential as the concentration gradient for Ca²⁺ ions is not created by the sodium–potassium pump. So, it is a wrong answer.

Option (c) is given as sodium ions (Na⁺). The number of leak channels for Na⁺ ions is comparatively less than that for potassium ions. So, it is a wrong answer.

Option (d) is given as chloride ions (Cl⁺). The chloride ions are present as Cl⁻ and not as Cl⁺. So, it is a wrong answer.

Hence, options (a), (c), and (d) are incorrect.

Answer 12

Conclusion

Therefore, it can be concluded that the potassium ions leak across the neuron’s membrane and thereby accomplish the resting potential.

Answer 13

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The pore-forming membrane proteins are referred to as ion channels, which permit the ions to cross the channel pore. Their main functions include establishing a resting membrane potential and shaping action potentials and other signals by allowing the flow of ions across the membrane.

Concept explainers

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Introduction:

The pore-forming membrane proteins are referred to as ion channels, which permit the ions to cross the channel pore. Their main functions include establishing a resting membrane potential and shaping action potentials and other signals by allowing the flow of ions across the membrane.

Answer to Problem 1TYK

Explanation of Solution

Want to see more full solutions like this?

Chapter 43 Solutions

The pore-forming membrane proteins are referred to as ion channels, which permit the ions to cross the channel pore. Their main functions include establishing a resting membrane potential and shaping action potentials and other signals by allowing the flow of ions across the membrane.

Concept explainers

Videos

Introduction: The pore-forming membrane proteins are referred to as ion channels, which permit the ions to cross the channel pore. Their main functions include establishing a resting membrane potential and shaping action potentials and other signals by allowing the flow of ions across the membrane.

Answer to Problem 1TYK

Explanation of Solution

Want to see more full solutions like this?

Chapter 43 Solutions