How transport and channel proteins function in a plasma membrane? Introduction: Water and non-polar molecules pass across the membrane by simple diffusion through channel proteins. But, polar molecules and other macromolecules require certain proteins located in the membrane for their transport. These membrane proteins are called membrane transport protein.

Question

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Answer 1

Question

Chapter 5, Problem 1BYB

Summary Introduction

To determine:

How transport and channel proteins function in a plasma membrane?

Introduction:

Water and non-polar molecules pass across the membrane by simple diffusion through channel proteins. But, polar molecules and other macromolecules require certain proteins located in the membrane for their transport. These membrane proteins are called membrane transport protein.

Expert Solution & Answer

Explanation of Solution

The transport proteins are of two types-

Carrier proteins
Channel proteins

Transport proteins perform facilitated diffusion as well as active transport.

CHANNEL PROTEINS – these are open to intracellular as well as extracellular space and are designed for passage of only a single specific substance.

Example - voltage gated channels found in neurons open up in response to change in membrane electrochemical potential and when they open, it causes bulk passage of ions through the cell.
But when closed, they do not allow any ion to pass through plasma membrane.

CARRIER PROTEINS - Open up to one side of membrane only.
They transport substances against concentration gradient and use energy to change their shape.

Example - Sodium potassium pump changes its shape using energy of ATP from being opened to intracellular environment to being open to extracellular solution allowing it to collect ions inside the cell and release them outside.

Conclusion

Hence, these proteins work in response to some or the other changes or substances response.

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Answer 2

Question

Chapter 5, Problem 1BYB

Summary Introduction

To determine:

How transport and channel proteins function in a plasma membrane?

Introduction:

Water and non-polar molecules pass across the membrane by simple diffusion through channel proteins. But, polar molecules and other macromolecules require certain proteins located in the membrane for their transport. These membrane proteins are called membrane transport protein.

Expert Solution & Answer

Explanation of Solution

The transport proteins are of two types-

Carrier proteins
Channel proteins

Transport proteins perform facilitated diffusion as well as active transport.

CHANNEL PROTEINS – these are open to intracellular as well as extracellular space and are designed for passage of only a single specific substance.

Example - voltage gated channels found in neurons open up in response to change in membrane electrochemical potential and when they open, it causes bulk passage of ions through the cell.
But when closed, they do not allow any ion to pass through plasma membrane.

CARRIER PROTEINS - Open up to one side of membrane only.
They transport substances against concentration gradient and use energy to change their shape.

Example - Sodium potassium pump changes its shape using energy of ATP from being opened to intracellular environment to being open to extracellular solution allowing it to collect ions inside the cell and release them outside.

Conclusion

Hence, these proteins work in response to some or the other changes or substances response.

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Answer 3

Question

Chapter 5, Problem 1BYB

Summary Introduction

To determine:

How transport and channel proteins function in a plasma membrane?

Introduction:

Water and non-polar molecules pass across the membrane by simple diffusion through channel proteins. But, polar molecules and other macromolecules require certain proteins located in the membrane for their transport. These membrane proteins are called membrane transport protein.

Expert Solution & Answer

Explanation of Solution

The transport proteins are of two types-

Carrier proteins
Channel proteins

Transport proteins perform facilitated diffusion as well as active transport.

CHANNEL PROTEINS – these are open to intracellular as well as extracellular space and are designed for passage of only a single specific substance.

Example - voltage gated channels found in neurons open up in response to change in membrane electrochemical potential and when they open, it causes bulk passage of ions through the cell.
But when closed, they do not allow any ion to pass through plasma membrane.

CARRIER PROTEINS - Open up to one side of membrane only.
They transport substances against concentration gradient and use energy to change their shape.

Example - Sodium potassium pump changes its shape using energy of ATP from being opened to intracellular environment to being open to extracellular solution allowing it to collect ions inside the cell and release them outside.

Conclusion

Hence, these proteins work in response to some or the other changes or substances response.

Want to see more full solutions like this?

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

Answer 4

Question

Chapter 5, Problem 1BYB

Summary Introduction

To determine:

How transport and channel proteins function in a plasma membrane?

Introduction:

Water and non-polar molecules pass across the membrane by simple diffusion through channel proteins. But, polar molecules and other macromolecules require certain proteins located in the membrane for their transport. These membrane proteins are called membrane transport protein.

Expert Solution & Answer

Explanation of Solution

The transport proteins are of two types-

Carrier proteins
Channel proteins

Transport proteins perform facilitated diffusion as well as active transport.

CHANNEL PROTEINS – these are open to intracellular as well as extracellular space and are designed for passage of only a single specific substance.

Example - voltage gated channels found in neurons open up in response to change in membrane electrochemical potential and when they open, it causes bulk passage of ions through the cell.
But when closed, they do not allow any ion to pass through plasma membrane.

CARRIER PROTEINS - Open up to one side of membrane only.
They transport substances against concentration gradient and use energy to change their shape.

Example - Sodium potassium pump changes its shape using energy of ATP from being opened to intracellular environment to being open to extracellular solution allowing it to collect ions inside the cell and release them outside.

Conclusion

Hence, these proteins work in response to some or the other changes or substances response.

Want to see more full solutions like this?

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

Answer 5

Chapter 5, Problem 1BYB

Summary Introduction

To determine:

How transport and channel proteins function in a plasma membrane?

Introduction:

Water and non-polar molecules pass across the membrane by simple diffusion through channel proteins. But, polar molecules and other macromolecules require certain proteins located in the membrane for their transport. These membrane proteins are called membrane transport protein.

Expert Solution & Answer

Explanation of Solution

The transport proteins are of two types-

Carrier proteins
Channel proteins

Transport proteins perform facilitated diffusion as well as active transport.

CHANNEL PROTEINS – these are open to intracellular as well as extracellular space and are designed for passage of only a single specific substance.

Example - voltage gated channels found in neurons open up in response to change in membrane electrochemical potential and when they open, it causes bulk passage of ions through the cell.
But when closed, they do not allow any ion to pass through plasma membrane.

CARRIER PROTEINS - Open up to one side of membrane only.
They transport substances against concentration gradient and use energy to change their shape.

Example - Sodium potassium pump changes its shape using energy of ATP from being opened to intracellular environment to being open to extracellular solution allowing it to collect ions inside the cell and release them outside.

Conclusion

Hence, these proteins work in response to some or the other changes or substances response.

Answer 6

Chapter 5, Problem 1BYB

Summary Introduction

To determine:

How transport and channel proteins function in a plasma membrane?

Introduction:

Water and non-polar molecules pass across the membrane by simple diffusion through channel proteins. But, polar molecules and other macromolecules require certain proteins located in the membrane for their transport. These membrane proteins are called membrane transport protein.

Expert Solution & Answer

Explanation of Solution

The transport proteins are of two types-

Carrier proteins
Channel proteins

Transport proteins perform facilitated diffusion as well as active transport.

CHANNEL PROTEINS – these are open to intracellular as well as extracellular space and are designed for passage of only a single specific substance.

Example - voltage gated channels found in neurons open up in response to change in membrane electrochemical potential and when they open, it causes bulk passage of ions through the cell.
But when closed, they do not allow any ion to pass through plasma membrane.

CARRIER PROTEINS - Open up to one side of membrane only.
They transport substances against concentration gradient and use energy to change their shape.

Example - Sodium potassium pump changes its shape using energy of ATP from being opened to intracellular environment to being open to extracellular solution allowing it to collect ions inside the cell and release them outside.

Conclusion

Hence, these proteins work in response to some or the other changes or substances response.

Answer 7

Chapter 5, Problem 1BYB

Summary Introduction

To determine:

How transport and channel proteins function in a plasma membrane?

Introduction:

Water and non-polar molecules pass across the membrane by simple diffusion through channel proteins. But, polar molecules and other macromolecules require certain proteins located in the membrane for their transport. These membrane proteins are called membrane transport protein.

Answer 8

Expert Solution & Answer

Explanation of Solution

The transport proteins are of two types-

Carrier proteins
Channel proteins

Transport proteins perform facilitated diffusion as well as active transport.

CHANNEL PROTEINS – these are open to intracellular as well as extracellular space and are designed for passage of only a single specific substance.

Example - voltage gated channels found in neurons open up in response to change in membrane electrochemical potential and when they open, it causes bulk passage of ions through the cell.
But when closed, they do not allow any ion to pass through plasma membrane.

CARRIER PROTEINS - Open up to one side of membrane only.
They transport substances against concentration gradient and use energy to change their shape.

Example - Sodium potassium pump changes its shape using energy of ATP from being opened to intracellular environment to being open to extracellular solution allowing it to collect ions inside the cell and release them outside.