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Ion Channel Proteins in Cell Membranes

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Questions and Answers

What is the primary reason why ligand gated ion channels can exhibit a diverse range of structural and functional properties?

The different compositions of the multi-metric complexes that make up the channels (correct)

The involvement of intermediate biochemical steps in the activation process

The speed of the response (in milliseconds) due to direct activation of the channel

The functional role of these receptors in synaptic transmission

What is the primary reason for the very fast (millisecond) response of ligand gated ion channels?

The diverse structural and functional properties of the different multi-metric complexes

The involvement of intermediate biochemical steps in the activation process

The important functional role of these receptors in synaptic transmission

The direct interaction between the ligand and the ion channel, which influences ion flow (correct)

How do ligand gated ion channels influence the electrical state of the cell membrane?

By playing an important functional role in synaptic transmission

By directly activating intermediate biochemical steps

By contributing to the diversity of structural and functional properties

By directly influencing ion flow, leading to either hyperpolarization or depolarization (correct)

Why do ligand gated ion channels play an important functional role in synaptic transmission?

Because of their very fast (millisecond) response time Signup and view all the answers

Which of the following is NOT a reason for the diversity in structural and functional properties of ligand gated ion channels?

The involvement of intermediate biochemical steps in the activation process Signup and view all the answers

What is the function of an ion channel protein when it is open?

It creates a water-filled pore for the movement of ions Signup and view all the answers

How does the selectivity of ion channels for specific ions occur?

Based on the charge and size of the structure inside the pore Signup and view all the answers

What regulates the gating of ion channels between open and closed states?

Binding of specific ligands to the channel Signup and view all the answers

How are many ligand-gated ion channels structured?

Multimeric, composed of multiple protein subunits Signup and view all the answers

What influences the switching between open and closed states in ion channels?

Binding of different ligands to specific sites on the channel Signup and view all the answers