Nervous System: Ion Channels 1. What structures in the cell membrane function as ion channels? 2. Channels can be classified as either gated or non-gated channels. A sodium channel that is always open would be classified as a _______channel. 3. Would sodium ions move into or out of the neuron through these channels?

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JonahAcuff1996 JonahAcuff1996

04-11-2019
Biology

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Nervous System: Ion Channels 1. What structures in the cell membrane function as ion channels? 2. Channels can be classified as either gated or non-gated channels. A sodium channel that is always open would be classified as a _______channel. 3. Would sodium ions move into or out of the neuron through these channels?

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onderozbasak onderozbasak · Answer 1 · 2019-11-07T19:56:26+01:00

Answer:

1: Ion channels are classified as "integral membrane proteins"

2: A sodium channel that is always open falls into "non-gated" channels.

3: Sodium ions would move into these channels.

Explanation:

1: Integral membrane proteins are usually spans the whole membrane and these type of integral proteins are "transmembrane" proteins. To form a channel they need to span lipid bilayer (two layers) and needs to be attached to it all the time (see first figure). Ion channels are no exception.

2: If it a sodium channel is always open it means it has no gate (non-gated) and allows the ions to travel freely (see second figure).

3: To create the action potential, the electrical current that allows neurons to pass on the information ion channels pumps the sodium ions inside and the potassium ions outside (see third figure)