The pore-forming membrane proteins are referred to as ion channels, which permit the movement of ion across the membrane. In the axonal membrane, channels are present for potassium ion (K + ) and sodium ions (Na + ). Their main functions include establishing a resting membrane potential of -70mV in absence of signal and producing action potential after stimulation.

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Answer 1

Question

Chapter 46, Problem 1TYK

Summary Introduction

Introduction:

The pore-forming membrane proteins are referred to as ion channels, which permit the movement of ion across the membrane. In the axonal membrane, channels are present for potassium ion (K⁺) and sodium ions (Na⁺). Their main functions include establishing a resting membrane potential of -70mV in absence of signal and producing action potential after stimulation.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

The neurons have a significantly larger number of potassium leaky channels, which facilitate the leakage of potassium ion across the membrane. These ions help to create the resting potential.

Explanation of Solution

Explanation/Justification for the correct answer:

Option (b) is given as potassium ion (K⁺) help to create the resting potential. The axonal membrane is almost impermeable to all cations except potassium ion. Thus the K⁺ will leak from the membrane along its electrochemical gradient. This helps in achieving the negative resting potential of the cell, that is attaining of depolarization. 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. They are present on the outer side of the membrane; their inward movement does not create resting membrane potential. So, it is a wrong answer.

Option (d) is given as chloride ions (Cl^-). The number of leaky channels for Cl^- is very less. 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 create the resting membrane potential.

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Students have asked these similar questions

a) How does E allow faster transmission of signals? b) What would happen if G has a lack of Calcium? c) Most neurons have the style of junction (chemical) shown in the diagram, rather than gap (electrical) junctions. Why does this make sense?

In the membrane of a neuron, what happens during an IPSP? A. All the ion gates in the membrane close. B. The sodium gates open. C. The potassium or chloride gates open. D. All the ion gates in the membrane open.

Which one of these is an example of an excitatory postynaptic potential in a typical neuron? a) A voltage change from -70mV to -70.5mV b) A voltage change from +35mV to 0MV c) A voltage change from 0mV to +0.35mV d) A voltage change from -69.5mV to -70mV

Answer 2

Question

Chapter 46, Problem 1TYK

Summary Introduction

Introduction:

The pore-forming membrane proteins are referred to as ion channels, which permit the movement of ion across the membrane. In the axonal membrane, channels are present for potassium ion (K⁺) and sodium ions (Na⁺). Their main functions include establishing a resting membrane potential of -70mV in absence of signal and producing action potential after stimulation.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

The neurons have a significantly larger number of potassium leaky channels, which facilitate the leakage of potassium ion across the membrane. These ions help to create the resting potential.

Explanation of Solution

Explanation/Justification for the correct answer:

Option (b) is given as potassium ion (K⁺) help to create the resting potential. The axonal membrane is almost impermeable to all cations except potassium ion. Thus the K⁺ will leak from the membrane along its electrochemical gradient. This helps in achieving the negative resting potential of the cell, that is attaining of depolarization. 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. They are present on the outer side of the membrane; their inward movement does not create resting membrane potential. So, it is a wrong answer.

Option (d) is given as chloride ions (Cl^-). The number of leaky channels for Cl^- is very less. 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 create the resting membrane potential.

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Answer 3

Question

Chapter 46, Problem 1TYK

Summary Introduction

Introduction:

The pore-forming membrane proteins are referred to as ion channels, which permit the movement of ion across the membrane. In the axonal membrane, channels are present for potassium ion (K⁺) and sodium ions (Na⁺). Their main functions include establishing a resting membrane potential of -70mV in absence of signal and producing action potential after stimulation.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

The neurons have a significantly larger number of potassium leaky channels, which facilitate the leakage of potassium ion across the membrane. These ions help to create the resting potential.

Explanation of Solution

Explanation/Justification for the correct answer:

Option (b) is given as potassium ion (K⁺) help to create the resting potential. The axonal membrane is almost impermeable to all cations except potassium ion. Thus the K⁺ will leak from the membrane along its electrochemical gradient. This helps in achieving the negative resting potential of the cell, that is attaining of depolarization. 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. They are present on the outer side of the membrane; their inward movement does not create resting membrane potential. So, it is a wrong answer.

Option (d) is given as chloride ions (Cl^-). The number of leaky channels for Cl^- is very less. 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 create the resting membrane potential.

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Answer 4

Question

Chapter 46, Problem 1TYK

Summary Introduction

Introduction:

The pore-forming membrane proteins are referred to as ion channels, which permit the movement of ion across the membrane. In the axonal membrane, channels are present for potassium ion (K⁺) and sodium ions (Na⁺). Their main functions include establishing a resting membrane potential of -70mV in absence of signal and producing action potential after stimulation.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

The neurons have a significantly larger number of potassium leaky channels, which facilitate the leakage of potassium ion across the membrane. These ions help to create the resting potential.

Explanation of Solution

Explanation/Justification for the correct answer:

Option (b) is given as potassium ion (K⁺) help to create the resting potential. The axonal membrane is almost impermeable to all cations except potassium ion. Thus the K⁺ will leak from the membrane along its electrochemical gradient. This helps in achieving the negative resting potential of the cell, that is attaining of depolarization. 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. They are present on the outer side of the membrane; their inward movement does not create resting membrane potential. So, it is a wrong answer.

Option (d) is given as chloride ions (Cl^-). The number of leaky channels for Cl^- is very less. 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 create the resting membrane 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 46, Problem 1TYK

Summary Introduction

Introduction:

The pore-forming membrane proteins are referred to as ion channels, which permit the movement of ion across the membrane. In the axonal membrane, channels are present for potassium ion (K⁺) and sodium ions (Na⁺). Their main functions include establishing a resting membrane potential of -70mV in absence of signal and producing action potential after stimulation.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

The neurons have a significantly larger number of potassium leaky channels, which facilitate the leakage of potassium ion across the membrane. These ions help to create the resting potential.

Explanation of Solution

Explanation/Justification for the correct answer:

Option (b) is given as potassium ion (K⁺) help to create the resting potential. The axonal membrane is almost impermeable to all cations except potassium ion. Thus the K⁺ will leak from the membrane along its electrochemical gradient. This helps in achieving the negative resting potential of the cell, that is attaining of depolarization. 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. They are present on the outer side of the membrane; their inward movement does not create resting membrane potential. So, it is a wrong answer.

Option (d) is given as chloride ions (Cl^-). The number of leaky channels for Cl^- is very less. 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 create the resting membrane potential.

Answer 6

Chapter 46, Problem 1TYK

Summary Introduction

Introduction:

The pore-forming membrane proteins are referred to as ion channels, which permit the movement of ion across the membrane. In the axonal membrane, channels are present for potassium ion (K⁺) and sodium ions (Na⁺). Their main functions include establishing a resting membrane potential of -70mV in absence of signal and producing action potential after stimulation.

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

The neurons have a significantly larger number of potassium leaky channels, which facilitate the leakage of potassium ion across the membrane. These ions help to create the resting potential.

Explanation of Solution

Explanation/Justification for the correct answer:

Option (b) is given as potassium ion (K⁺) help to create the resting potential. The axonal membrane is almost impermeable to all cations except potassium ion. Thus the K⁺ will leak from the membrane along its electrochemical gradient. This helps in achieving the negative resting potential of the cell, that is attaining of depolarization. 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. They are present on the outer side of the membrane; their inward movement does not create resting membrane potential. So, it is a wrong answer.

Option (d) is given as chloride ions (Cl^-). The number of leaky channels for Cl^- is very less. 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 create the resting membrane potential.

Answer 7

Chapter 46, Problem 1TYK

Summary Introduction

Introduction:

The pore-forming membrane proteins are referred to as ion channels, which permit the movement of ion across the membrane. In the axonal membrane, channels are present for potassium ion (K⁺) and sodium ions (Na⁺). Their main functions include establishing a resting membrane potential of -70mV in absence of signal and producing action potential after stimulation.

Answer 8

Expert Solution & Answer

Answer to Problem 1TYK

Correct answer:

The neurons have a significantly larger number of potassium leaky channels, which facilitate the leakage of potassium ion across the membrane. These ions help to create the resting potential.

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⁺) help to create the resting potential. The axonal membrane is almost impermeable to all cations except potassium ion. Thus the K⁺ will leak from the membrane along its electrochemical gradient. This helps in achieving the negative resting potential of the cell, that is attaining of depolarization. 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. They are present on the outer side of the membrane; their inward movement does not create resting membrane potential. So, it is a wrong answer.

Option (d) is given as chloride ions (Cl^-). The number of leaky channels for Cl^- is very less. 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 create the resting membrane potential.

Answer 13

Ch. 46 - Prob. 1TYK Ch. 46 - Prob. 3TYK Ch. 46 - Prob. 2TYK Ch. 46 - In a neuron, what creates the electrochemical...Ch. 46 - Prob. 5TYK Ch. 46 - Explain the difference between a ligand-gated K+...Ch. 46 - 6. Draw a graph of an action potential and label...Ch. 46 - Explain why the Na+/K+-ATPase is...Ch. 46 - Prob. 9TYU Ch. 46 - Prob. 10TYU

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